<p><strong>🎤Dr. Christopher Reid (Professor of Chemistry and Biochemistry at Bryant University in Rhode Island)</strong></p><p><strong>In this episode of Concentrating on Chromatography, host Dave Oliva sits down with Chris Reid to explore how chemical biology and LC-MS are being used to tackle one of the most urgent global challenges: antimicrobial resistance.</strong></p><p>As antibiotic resistance continues to rise—and new drug development struggles to keep pace—researchers are looking beyond traditional approaches. Instead of targeting how bacteria build their cell walls, Chris’s work focuses on how they break them down, opening the door to entirely new antimicrobial strategies.</p><h4><strong>What You’ll Learn in This Episode:</strong></h4><ul><li>Why antimicrobial resistance is accelerating globally</li><li>What peptidoglycan is and why it’s essential to bacterial survival</li><li>How targeting cell wall degradation differs from traditional antibiotics</li><li>The strategy behind designing small molecule probes and inhibitors</li><li>How LC-MS is used to analyze peptidoglycan fragments and enzyme activity</li><li>Key analytical challenges: complex mixtures, low-abundance species, and structural similarity</li><li>The importance of sample preparation and reproducibility in LC-MS workflows</li><li>How this research could lead to new antibiotic targets</li></ul><h3><strong>Video Transcription</strong></h3><h4><strong>The Growing Challenge of Antibiotic Resistance</strong></h4><p>According to Reid, antibiotic resistance is increasing across a broad spectrum of bacterial pathogens that were once readily treated with existing therapies. In some cases, clinicians must now rely on only a handful of last-line antibiotics, while resistance is also rising in diseases such as tuberculosis.</p><p>One of the major obstacles is the limited commercial incentive to develop entirely new antibiotics. Because bacterial resistance can emerge relatively quickly after a drug reaches the market, pharmaceutical companies often favor modifying existing antibiotics or combining them with resistance-modifying agents rather than investing in completely new drug classes. As a result, genuinely novel antibacterial targets remain urgently needed.</p><h4><strong>Why the Bacterial Cell Wall Remains an Attractive Target</strong></h4><p>The bacterial cell wall consists primarily of <strong>peptidoglycan</strong>, a highly cross-linked polymer that provides structural integrity, maintains cell shape, and enables bacterial growth and division.</p><p>Many widely used antibiotics—including the β-lactam antibiotics such as penicillins—target enzymes responsible for synthesizing or cross-linking peptidoglycan. These pathways have proven highly successful therapeutic targets because peptidoglycan is unique to bacteria and absent from human cells, minimizing unwanted effects on the host.</p><p>However, most existing antibiotics target only specific stages of peptidoglycan biosynthesis. Reid's research explores another part of this complex pathway: enzymes responsible for degrading the carbohydrate backbone of peptidoglycan during normal bacterial growth and remodeling. These enzymes may represent an underexplored class of antimicrobial targets capable of overcoming existing resistance mechanisms.</p><h4><strong>Targeting the Glycan Backbone</strong></h4><p>A key advantage of focusing on the carbohydrate backbone is its remarkable conservation across both Gram-positive and Gram-negative bacteria.</p><p>Whereas the peptide components of peptidoglycan vary considerably between bacterial species—and frequently acquire mutations associated with antibiotic resistance—the glycan backbone remains highly conserved and tolerates relatively few structural modifications.</p><p>This biological constraint makes enzymes acting on the glycan backbone particularly attractive targets. Reid's group developed a series of <strong>small-molecule probes and inhibitors</strong> designed to recognize enzymes known as <strong>N-acetylglucosaminidases</strong>, which cleave glycosidic bonds within peptidoglycan and generate soluble degradation products.</p><p>Rather than beginning with purified enzymes, the researchers adopted a <strong>top-down phenotypic screening strategy</strong>. Candidate compounds were first evaluated for their ability to inhibit bacterial growth before progressively narrowing the list of potential molecular targets through genetic studies, microscopy, enzyme assays, and biochemical characterization. This iterative workflow ultimately identified compounds capable of inhibiting the desired enzyme class while simultaneously providing valuable chemical probes for studying bacterial cell wall biology.</p><h4><strong>LC-MS as a Central Analytical Tool</strong></h4><p>Liquid chromatography coupled with mass spectrometry plays a central role throughout the project by enabling detailed characterization of structural changes occurring within peptidoglycan after bacterial cells are treated with candidate inhibitors.</p><p>Because intact peptidoglycan is an insoluble polymer, sample preparation begins with isolation of the bacterial cell wall through detergent extraction and differential centrifugation. Additional purification steps remove proteins, nucleic acids, and teichoic acids before enzymatic digestion converts the insoluble material into soluble fragments suitable for chromatographic analysis.</p><p>The resulting digest is analyzed by LC-MS to examine changes in the distribution of peptidoglycan fragments. Chromatographic retention times provide an immediate indication of changes in cross-linking, with larger oligomers such as trimers and tetramers generally eluting later than monomeric fragments. Mass spectrometry then confirms the identity of these fragments by measuring their intact molecular masses, while tandem MS experiments can provide further structural information when required.</p><h4><strong>Sample Preparation Determines Data Quality</strong></h4><p>Reid emphasized that sample preparation represents one of the most critical—and challenging—stages of the entire workflow.</p><p>Because peptidoglycan analysis involves multiple purification, digestion, and reduction steps, even minor procedural differences between samples can introduce analytical artifacts that complicate biological interpretation.</p><p>Maintaining strict consistency throughout sample preparation is therefore essential. Appropriate controls must accompany every experiment, ensuring that observed chromatographic and mass spectrometric differences truly reflect biological responses rather than experimental variability. The complexity of bacterial cell wall composition further increases the analytical challenge, as subtle differences in amino acid substitutions and low-abundance cross-linked species can complicate LC-MS data interpretation.</p><h4><strong>Chemical Biology for Future Antibiotic Discovery</strong></h4><p>Although the identified compounds may eventually serve as starting points for antibiotic development, Reid views them primarily as <strong>chemical biology tools</strong>.</p><p>By selectively inhibiting individual enzymes, these probes allow researchers to investigate previously unexplored aspects of bacterial cell wall remodeling that cannot easily be studied using classical genetic approaches alone.</p><p>The research team is now expanding this strategy by combining their probes with <strong>proximity-labeling proteomics and mass spectrometry</strong>, aiming to map protein interaction networks associated with bacterial cell wall degradation. Such studies may reveal entirely new antibacterial targets and provide deeper insight into the biological processes governing bacterial growth and division.</p><p>Ultimately, the work illustrates how integrating synthetic chemistry, microbiology, molecular biology, and advanced LC-MS can accelerate the search for innovative therapeutic strategies against antimicrobial resistance. As existing antibiotics become progressively less effective, multidisciplinary approaches such as these may play an increasingly important role in identifying the next generation of antibacterial targets.</p><blockquote><p><strong>This text has been automatically transcribed from a video presentation using AI technology. It may contain inaccuracies and is not guaranteed to be 100% correct.</strong></p></blockquote><blockquote><h4><strong>Concentrating on Chromatography Podcast</strong></h4><p>Dive into the frontiers of chromatography, mass spectrometry, and sample preparation with host David Oliva. Each episode features candid conversations with leading researchers, industry innovators, and passionate scientists who are shaping the future of analytical chemistry. From decoding PFAS detection challenges to exploring the latest in AI-assisted liquid chromatography, this show uncovers practical workflows, sustainability breakthroughs, and the real-world impact of separation science. Whether you’re a chromatographer, lab professional, or researcher you'll discover inspiring content!</p><p>You can find <strong>Concentrating on Chromatography Podcast </strong>in podcast apps:</p><ul><li><a target="_blank" rel="noopener noreferrer" href="https://open.spotify.com/show/1wZg67rCjoGju4yhqxI3tL"><strong>Spotify</strong></a></li><li><a target="_blank" rel="noopener noreferrer" href="https://podcasts.apple.com/tz/podcast/concentrating-on-chromatography/id1788429185"><strong>Apple podcast</strong></a></li><li><a target="_blank" rel="noopener noreferrer" href="https://podscan.fm/podcasts/concentrating-on-chromatography"><strong>podscan</strong></a></li></ul><p>and on <a target="_blank" rel="noopener noreferrer" href="https://www.youtube.com/@ChromatographyTalk/videos"><strong>YouTube channel</strong></a></p></blockquote>

 Fighting Antibiotic Resistance with LC-MS: Targeting Bacterial Cell Walls

<p><strong>This study compares a commercial ELISA assay with a validated UHPLC-MS/MS method for determining total ergot alkaloids in wheat and durum samples. In addition to method performance, the authors investigated cross-reactivity and matrix effects to explain differences between immunoassay and chromatographic results.</strong></p><p>While ELISA demonstrated good repeatability and is well suited for high-throughput screening, systematic biases were observed due to compound- and matrix-dependent cross-reactivity. The findings support ELISA as an effective screening tool, whereas UHPLC-MS/MS remains the preferred method for accurate quantification and regulatory confirmation of ergot alkaloids.</p><blockquote><h4><strong>The original article</strong></h4><h4><a target="_blank" rel="noopener noreferrer" href="https://pubs.acs.org/doi/10.1021/acs.jafc.6c05234"><strong>Comparative Evaluation of Total Ergot Alkaloids Determination by ELISA and UHPLC-MS/MS in Wheat: Implications of Cross-Reactivity and Matrix Effects</strong></a></h4><p>Chamali Kodikara*, Dainna Drul, Nandika Bandara, and Sheryl A. Tittlemier*</p><p>J. Agric. Food Chem. 2026, 74, 25, 20015–20027</p><p><a target="_blank" rel="noopener noreferrer" href="https://doi.org/10.1021/acs.jafc.6c05234">https://doi.org/10.1021/acs.jafc.6c05234</a></p><h6>licensed under <a target="_blank" rel="noopener noreferrer" href="https://creativecommons.org/licenses/by/4.0/"><strong>CC-BY 4.0</strong></a></h6></blockquote><p><strong>Selected sections from the article follow. Formats and hyperlinks were adapted from the original.</strong></p><div><p>Ergot alkaloids (EAs) are a structurally diverse group of indole-derived mycotoxins produced primarily by phytopathogenic fungi of the genus <i>Claviceps</i>, most notably <i>Claviceps purpurea</i>. These fungi infect the flowering heads of cereal crops, replacing the developing grain with hardened fungal structures (sclerotia) that contain ergot alkaloids. Cereals such as rye, wheat, barley, oats, and triticale are particularly susceptible, with infection severity strongly influenced by environmental conditions during flowering, including rainfall and humidity. <a href="javascript:void(0);">(1−3)</a> Although improvements in agronomic practices and grain cleaning have reduced the prevalence of visible ergot sclerotia, ergot alkaloids can persist in cereals and cereal-based foods even in the absence of detectable sclerotia. This may occur because sclerotia can fragment during harvesting, handling, cleaning, or milling, producing small particles that are not visually detected but may still contribute ergot alkaloids to grain or processed products, continuing to pose food and feed safety concerns. <a href="javascript:void(0);">(4)</a> <a href="javascript:void(0);">(5)</a> Ergot alkaloids share a common tetracyclic ergoline backbone and occur as structurally related compounds, including ergometrine, ergotamine, ergosine, ergocristine, ergocryptine, and ergocornine, together with their corresponding C-8 epimers. These epimers occur as <i>R-</i> and <i>S-</i>configurations, commonly referred to as -ine and -inine forms, respectively. Epimerization at the C-8 position can occur during fungal metabolism and during sample extraction, storage, and analysis, complicating accurate quantification. <a href="javascript:void(0);">(6,7)</a> Although S-epimers were historically considered biologically inactive, recent evidence indicates that they may contribute to overall exposure and toxicity, supporting their inclusion in analytical and regulatory frameworks. <a href="javascript:void(0);">(3)</a></p><p>Dietary exposure to elevated levels of ergot alkaloids has been associated with a range of adverse health effects, collectively referred to as ergotism, including vasoconstriction, ischemia, neurological disturbances, and hallucinations. <a href="javascript:void(0);">(3)</a> These effects arise primarily from interactions with adrenergic, serotonergic, and dopaminergic receptors. <a href="javascript:void(0);">(8−10)</a> In response, regulatory limits for ergot alkaloids in food have been introduced or revised in several jurisdictions. In the European Union, maximum levels have been established for the sum of 12 ergot alkaloids in cereal milling products under Regulation (EU) 2021/1399, which was subsequently consolidated under Regulation (EU) 2023/915. This sum includes ergometrine, ergosine, ergotamine, ergocornine, ergocryptine, and ergocristine together with their corresponding -inine epimers, increasing the demand for reliable analytical methods to support routine monitoring and enforcement. <a href="javascript:void(0);">(1,11)</a></p><p>Liquid chromatography-tandem mass spectrometry (LC-MS/MS), particularly ultrahigh performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS), is widely regarded as the reference technique for confirmatory determination of ergot alkaloids due to its sensitivity, selectivity, and ability to resolve epimeric forms. Recent methods routinely achieve low microgram-per-kilogram limits of quantification across a range of cereal matrices. <a href="javascript:void(0);">(12−17)</a> However, LC-MS/MS approaches are resource-intensive and typically confined to centralized laboratories, limiting their suitability for high-throughput screening or rapid decision-making in grain-handling and quality-control settings. Consequently, rapid screening methods, most notably enzyme-linked immunosorbent assays (ELISAs), are commonly employed as complementary tools to chromatographic analysis. <a href="javascript:void(0);">(18−21)</a> ELISAs offer reduced analysis time, simplified workflows, and lower per-sample costs, making them attractive for preliminary screening and sample triage. <a href="javascript:void(0);">(22−24)</a></p><p>In contrast to other regulated mycotoxins, however, the commercial availability of ELISAs for ergot alkaloids is limited. While multiple kits have been evaluated, performance has varied substantially across assays and matrices. <a href="javascript:void(0);">(1)</a> At present, the Randox Food Diagnostics Ergot Alkaloids ELISA is the only widely marketed microplate ELISA that quantifies the sum of 12 major ergot alkaloids, comprising ergometrine, ergosine, ergotamine, ergocornine, ergocryptine, and ergocristine together with their corresponding -inine epimers, consistent with the analyte scope used for EU maximum levels for ergot alkaloids in specified cereal products. <a href="javascript:void(0);">(25)</a></p><p>In addition, cereal matrix effects may influence antibody binding and signal generation, potentially resulting in biased quantification relative to LC-MS/MS reference methods. These limitations are particularly relevant given the compositional variability of ergot alkaloids across cereal species, geographic regions, and growing conditions. <a href="javascript:void(0);">(12)</a> Recent reviews emphasize the need for systematic, matrix-specific evaluation of immunoassay performance before such methods can be confidently integrated into regulatory or industrial monitoring programs. <a href="javascript:void(0);">(1,6,11)</a> However, independent evaluations of commercially available ergot alkaloid ELISAs, particularly those benchmarked against validated UHPLC-MS/MS methods using naturally infested wheat samples, remain limited.</p><p>In this context, we hypothesized that measurements of total ergot alkaloids obtained using a commercially available ELISA are influenced by matrix effects and antibody cross-reactivity, resulting in systematic differences compared to UHPLC-MS/MS, which provides compound-specific quantification. To test this, the objective of the present study was to conduct a comprehensive performance evaluation of a commercially available ELISA for the detection of ergot alkaloids in wheat, using UHPLC-MS/MS as a reference method. Specific aims included assessment of repeatability and intermediate precision, extraction efficiency and extract stability, the influence of test portion mass, method accuracy relative to UHPLC-MS/MS, and characterization of antibody cross-reactivity toward individual ergot alkaloids in both solvent and wheat matrix. The results provide data-driven guidance on the appropriate use of ELISA-based screening within tiered analytical strategies for regulatory monitoring and food safety decision-making.</p><h4><strong>2. Materials and Methods</strong></h4><h5><strong>2.3. UHPLC-MS/MS Reference Method</strong></h5><p>UHPLC-MS/MS analysis of ergot alkaloids was performed using the validated Canadian Grain Commission (CGC) method described by Tittlemier et al. (2015). Briefly, ground grain (10 g) was extracted with 50 mL of acetonitrile/aqueous ammonium carbonate (84:16, v/v; 3.03 mM ammonium carbonate) to provide alkaline extraction conditions, then shaken for 30 min and centrifuged at 2450<i>g</i> for 10 min at room temperature. An aliquot of extract (464 μL) was combined with internal standard solution (dihydroergotamine; 20 μL of 4 ng/μL) and aqueous ammonium carbonate (1536 μL), vortex-mixed, and filtered through a 0.45 μm polytetrafluoroethylene syringe filter before injection into the UHPLC-MS/MS system. As in the validated reference method, dihydroergotamine was added after extraction to correct for postextraction analytical variability; extraction recovery was evaluated during method validation. Chromatographic separation was achieved using a reversed-phase <strong>BEH C18 column</strong> (2.1 × 100 mm, 1.7 μm; Waters, Milford, MA, USA) with the autosampler maintained at 15 °C and the column at 30 °C. Mobile phases consisted of (A) 3.03 mM aqueous ammonium carbonate and (B) acetonitrile. The gradient program was as follows: initial, 75% A/25% B; 1.00 min, 60% A/40% B; 5.00 min, 40% A/60% B; 8.00 min, 22% A/78% B; 10.50–11.00 min, 10% A/90% B; and 13.00–16.00 min, 75% A/25% B, with a total run time of 16 min. Detection was performed using positive electrospray ionization in multiple reaction monitoring mode on a <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/554"><strong>Waters Xevo triple quadrupole mass spectrometer</strong></a> (Waters, Milford, MA, USA). Under the validated chromatographic conditions, dihydroergotamine did not coelute with ergotamine, ergotaminine, or the other target ergot alkaloids. Identification and quantification were based on retention-time criteria and compound-specific MRM transitions, thereby minimizing potential isotopic or coelution interference. Precautions to minimize epimerization, including controlled handling of standards and extracts and reduced light exposure, were followed as described in the reference method. UHPLC-MS/MS quantification was performed using analyte-specific, matrix-matched calibration curves prepared according to the validated CGC reference method, with calibration levels of 0.046, 0.2, 1, 2, 10, and 20 μg/kg. Dihydroergotamine was used as the internal standard, and concentrations were calculated from internal-standard-normalized analyte responses with method dilution factors applied. Total ergot alkaloid concentration was calculated as the arithmetic sum of all quantified ergot alkaloids and epimers included in the validated method. <a href="javascript:void(0);">(26)</a></p><h4><strong>3. Results and Discussion</strong></h4><h5><strong>3.4. Comparison of ELISA and UHPLC-MS/MS Results</strong></h5><p>For method comparison, UHPLC-MS/MS was used as the chemical reference method, providing compound-specific quantification of individual ergot alkaloids and their epimers. A total ergot alkaloid concentration was calculated as the arithmetic sum of all quantified alkaloids included in the method. This summed value represents a chemically defined total based on compound-specific quantification of each analyte, rather than an immunoreactivity-weighted response governed by antibody affinity. As such, the UHPLC-MS/MS total serves as a chemically defined comparator against which the immunoreactivity-weighted ELISA response can be interpreted. Agreement between the commercial ELISA and the validated UHPLC-MS/MS reference method was evaluated using wheat and durum wheat cargo samples (<i>n</i> = 102) collected over multiple crop years (<a target="_blank" rel="noopener noreferrer" href="https://pubs.acs.org/doi/10.1021/acs.jafc.6c05234#fig5">Figure 5</a>). Linear regression analysis demonstrated a positive association between ELISA and UHPLC-MS/MS results across the full concentration range, indicating that the ELISA was responsive to increasing ergot alkaloid levels. However, the regression slope deviated substantially from unity, with ELISA results systematically lower than UHPLC-MS/MS values, indicating an approximate 2-fold underestimation.&nbsp;</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/J_Agric_Food_Chem_2026_74_25_20015_20027_Figure_5_Linear_regression_analysis_comparing_total_ergot_alkaloid_concentrations_determined_by_ELISA_and_UHPLC_MS_MS_5d7b5c5c61.jpeg" alt="J. Agric. Food Chem. 2026, 74, 25, 20015–20027: Figure 5. Linear regression analysis comparing total ergot alkaloid concentrations determined by ELISA and UHPLC-MS/MS for wheat and durum wheat cargo samples (n = 102). Each point represents the mean of duplicate measurements (extracted from the same test portion) ELISA determinations for an individual cargo sample, plotted against the corresponding UHPLC-MS/MS result. Statistical analysis was performed using linear regression." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_J_Agric_Food_Chem_2026_74_25_20015_20027_Figure_5_Linear_regression_analysis_comparing_total_ergot_alkaloid_concentrations_determined_by_ELISA_and_UHPLC_MS_MS_5d7b5c5c61.jpeg 197w," sizes="100vw" width="992" height="784"></p><p>Bland-Altman analysis confirmed this proportional bias, showing a consistent negative mean difference between ELISA and UHPLC-MS/MS results across the concentration range (<a target="_blank" rel="noopener noreferrer" href="https://pubs.acs.org/doi/10.1021/acs.jafc.6c05234#fig6">Figure 6</a>). Importantly, the magnitude of disagreement did not increase randomly with concentration; rather, it reflected a systematic offset, indicating that the discrepancy was not driven by analytical imprecision or outliers but by fundamental differences in method response characteristics. This pattern indicates method-level bias rather than random analytical variability, which may arise from combined workflow effects including extraction, matrix response, and immunochemical cross-reactivity. The magnitude of the ELISA-UHPLC-MS/MS bias was substantially greater than the intermediate precision observed for the ELISA quality-control material, supporting the interpretation that the disagreement reflects systematic differences in method response rather than insufficient ELISA repeatability. Such behavior is well documented when immunoassays are compared with chromatographic methods for complex mycotoxin mixtures, including ergot alkaloids and other structurally diverse mycotoxins in cereals and feed. <a href="javascript:void(0);">(28,30,33)</a> These studies consistently report matrix- and profile-dependent bias in ELISA relative to LC-MS/MS, arising from differential antibody cross-reactivity and the summed immunoreactivity response of the assay, because ELISA produces an immunoreactivity-weighted total that depends on antibody affinity toward individual alkaloids and their relative abundance in the sample, whereas UHPLC-MS/MS quantifies compound-specific concentrations of each alkaloid and its epimers using compound-specific transitions and response factors, and total ergot alkaloid concentration is calculated as the sum of these targeted analytes. In contrast, ELISA produces an immunoreactivity-weighted total, determined by antibody affinity toward individual alkaloids and their competitive binding behavior within the assay format. Consequently, agreement between ELISA and UHPLC-MS/MS depends not only on total concentration, but also on the relative distribution of individual alkaloids within each sample. Although differences in extraction solvent composition and pH may influence ergot alkaloid recovery, stability, and epimeric distribution, each method was applied according to its intended analytical workflow. The ELISA was performed using the manufacturer-recommended acidic methanol/water extraction, whereas UHPLC-MS/MS was performed using the validated acetonitrile/aqueous ammonium carbonate extraction procedure. Therefore, the comparison reflects the performance of the complete methods as used in practice, rather than an isolated comparison of extraction solvents. The sequential extraction experiment further showed that repeating the ELISA extraction under the same kit conditions did not substantially increase the ELISA-measured response, supporting the adequacy of the kit extraction within the ELISA workflow while recognizing that it does not directly compare acidic and ammonium carbonate-based extraction conditions. Previous ELISA-LC-MS/MS comparison studies for ergot alkaloids have reported both under- and overestimation depending on assay design and matrix, including differences in alkaloid profile, cereal type, and antibody cross-reactivity. Turner et al. observed substantial overestimation of ergot alkaloids by ELISA relative to HPLC in rye field samples, attributed to strong antibody cross-reactivity toward alkaloids prevalent in rye matrices. Similar profile-dependent bias has also been reported in interlaboratory and method-comparison studies, <a href="javascript:void(0);">(33)</a> demonstrating that this behavior is not unique to a single data set.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/J_Agric_Food_Chem_2026_74_25_20015_20027_Figure_6_Bland_Altman_plot_comparing_ELISA_and_UHPLC_MS_MS_measurements_of_total_ergot_alkaloids_1be40cce50.jpeg" alt="J. Agric. Food Chem. 2026, 74, 25, 20015–20027: Figure 6. Bland-Altman plot comparing ELISA and UHPLC-MS/MS measurements of total ergot alkaloids for wheat and durum wheat cargo samples (n = 102)." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_J_Agric_Food_Chem_2026_74_25_20015_20027_Figure_6_Bland_Altman_plot_comparing_ELISA_and_UHPLC_MS_MS_measurements_of_total_ergot_alkaloids_1be40cce50.jpeg 230w," sizes="100vw" width="1437" height="977"></p><p>This study provides a comprehensive evaluation of a commercially available ELISA for total ergot alkaloids, using wheat samples as the primary application matrix, and integrates performance metrics with mechanistic insights into method behavior. While the assay demonstrated strong repeatability, calibration stability, and robustness to procedural factors such as test portion mass and extraction conditions, systematic differences relative to UHPLC-MS/MS were consistently observed. By linking these differences to compound-specific antibody cross-reactivity and matrix-dependent signal modulation, this work clarifies that ELISA-derived results reflect an immunochemically weighted response rather than a stoichiometric total. This distinction is critical for the appropriate interpretation of ELISA data and supports its use within tiered analytical strategies as a rapid screening tool, complemented by UHPLC-MS/MS for confirmatory quantification and regulatory decision-making.</p></div>

Comparative Evaluation of Total Ergot Alkaloids Determination by ELISA and UHPLC-MS/MS in Wheat: Implications of Cross-Reactivity and Matrix Effects

<p><strong>In the week of July 6, the following webinars await you in the field of liquid phase and especially HPLC and LC/MS.</strong></p><blockquote><h4><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/webinars"><strong>👉 DETAILS AND REGISTRATION IN THE WEBINARS SECTION</strong></a></h4><p><strong>👉 Search and filter in the largest global database</strong> with over <strong>5 500 GC, LC, MS and spectroscopy webinars</strong>.</p></blockquote><h5><strong>1. Waters Corporation: Characterizing Next-Generation Antibody Therapeutics: LC Strategies for Multispecifics, ADCs &amp; AOCs</strong></h5><ul><li>Tu, 7.7.2026 11:00 CEST</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/webinar/6317">Registration</a></li></ul><p>In this webinar, we share a pragmatic characterization roadmap using LC-based methods across intact, subunit, and peptide-mapping workflows.</p><h5><strong>2. Separation Science: Advances in Antibiotic Extraction from Water: An Automated SPE Approach</strong></h5><ul><li>We, 8.7.2026 09:00 CEST</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/webinar/6319">Registration</a></li></ul><p>Streamline water analysis workflows and gain practical insights for modern environmental monitoring.</p><h5><strong>3. SCIEX: Analysis of per- and polyfluoroalkyl substances (PFAS) in food substances using LC-MS/MS solutions</strong></h5><ul><li>We, 8.7.2026 15:00 CEST</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/webinar/6322">Registration</a></li></ul><p>Master PFAS analysis in food safety. Learn how SCIEX LC-MS/MS solutions and QTRAP workflows overcome analytical challenges to ensure accurate and compliant result confirmation.</p><h5><strong>4. Wiley: From liquids to solids: expand what your UV-Vis-NIR Spectrometer can do</strong></h5><ul><li>We, 8.7.2026 16:00 CEST</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/webinar/6367">Registration</a></li></ul><p>Discover how the Agilent Cary UV-Vis-NIR spectrometer, together with Specac accessories, enables reliable analysis of liquids, powders, films, pellets, and highly scattering solid samples.</p><h5><strong>5. Thermo Fisher Scientific: Advanced tools to maximize your sample throughput with Chromeleon Software and Vanquish UHPLC</strong></h5><ul><li>Th, 9.7.2026 11:00 CEST</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/webinar/6326">Registration</a></li></ul><p>Learn how Chromeleon software and the Vanquish Duo UHPLC system streamline sample analysis, automate routine workflows, increase throughput, and reduce errors through practical demonstrations.</p><h5><strong>6. Bruker: 4D-Metabolomics™ in Action: Real-World Strategies for Deep Discovery and Confident Annotation</strong></h5><ul><li>Th, 9.7.2026 17:00 CEST</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/webinar/6328">Registration</a></li></ul><p>Explore how next-generation mass spectrometry technologies, ion mobility, and computational tools are helping researchers move from complex datasets to confident insight.</p><h5><strong>7. Waters Corporation: Cracking the Code on Nitrogen Methods</strong></h5><ul><li>Th, 9.7.2026 17:00 CEST</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/webinar/6327">Registration</a></li></ul><p>Learn the fundamentals of nitrogen analysis for wastewater testing. Explore analytical methods, QA/QC, sample handling, compliance reporting, and troubleshooting for accurate environmental monitoring.</p><h5><strong>8. SelectScience: Next-generation metabolomics: From annotation to discovery at scale</strong></h5><ul><li>Th, 9.7.2026 17:00 CEST</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/webinar/6281">Registration</a></li></ul><p>Explore how next-generation mass spectrometry, ion mobility, and advanced computational tools accelerate confident small-molecule annotation and discovery in metabolomics.</p><h5><strong>9. SCIEX: LC-MS/HRMS Approaches for Monitoring Organic Micropollutants in Wastewater and Environmental Systems</strong></h5><ul><li>Fr, 10.7.2026 15:00 CEST</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/webinar/6370">Registration</a></li></ul><p>Discover how advanced LC-MS/HRMS workflows enable trace-level detection of organic micropollutants, suspect and non-target screening, and environmental monitoring of wastewater systems.</p>

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Waters Xevo G2-XS QTof Quadrupole Time-of-Flight Mass Spectrometry

The Xevo® G2-XS QTof combines StepWaveTM ion optics with the XS Collision Cell, providing a significant increase in sensitivity with no reduction in selectivity.

<h4><strong>eXtreme Sensitivity, eXtraordinary Selectivity, eXceptional Solutions</strong></h4><div><p><strong>For the scientist who needs to identify, quantify and confirm the broadest range of compounds in the most complex and challenging samples.</strong></p><ul><li>Maximum robustness with no compromise in performance</li><li>Class-leading real-world quantitative sensitivity</li><li>Highest quality, most comprehensive qualitative information</li><li>Flexibility to adapt to changing needs</li><li>Accessible to experts and non-experts alike</li></ul><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_Xevo_G2_XS_Q_Tof_Quadrupole_Time_of_Flight_Mass_Spectrometry_1_b9f8dd32be/Waters-Xevo-G2-XS-QTof-Quadrupole-Time-of-Flight-Mass-Spectrometry-1.jpg" alt="Waters Xevo G2-XS QTof Quadrupole Time-of-Flight Mass Spectrometry." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_Xevo_G2_XS_Q_Tof_Quadrupole_Time_of_Flight_Mass_Spectrometry_1_b9f8dd32be/thumbnail_Waters-Xevo-G2-XS-QTof-Quadrupole-Time-of-Flight-Mass-Spectrometry-1.jpg 173w," sizes="100vw" width="1099" height="991"></p><h3><strong>Overview</strong></h3><div><h4><strong>Maximum robustness with no compromise in performance</strong></h4><p>The trend for increasing complexity of both samples and studies can result in difficulty obtaining high quality data for every component of interest while maintaining optimum performance throughout the analysis.</p><p>The <strong>Xevo® G2-XS QTof</strong> combines <strong>StepWave<sup>TM</sup> ion optics</strong> with the <strong>XS Collision Cell</strong>, providing a significant increase in sensitivity with no reduction in selectivity.&nbsp; During long analyses, critical hardware components stay clean for longer, so results are more reproducible and the laboratory stays productive.</p><p>Meaningful information is obtained for a greater number of components across a larger population of samples than ever before, giving a more complete picture for improved understanding and more confident decision making.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_Xevo_G2_XS_Q_Tof_Quadrupole_Time_of_Flight_Mass_Spectrometry_437f84bacd.jpg" alt="Waters Xevo G2-XS QTof Quadrupole Time-of-Flight Mass Spectrometry: Maximum robustness with no compromise in performance." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_Xevo_G2_XS_Q_Tof_Quadrupole_Time_of_Flight_Mass_Spectrometry_437f84bacd.jpg 224w," sizes="100vw" width="900" height="628"></p><div><h4><strong>Class-leading real-world quantitative sensitivity</strong></h4><p>In targeted quantitative analysis, the greatest challenge is to detect and quantify components of interest down to the lowest possible levels, often in the presence of interferences from complex matrix.&nbsp; Large variation in the concentrations of different components further adds to this challenge.</p><p>The <strong>Xevo G2-XS QTof</strong> combines sensitivity and selectivity with the mass accuracy, dynamic range and speed provided by <strong>QuanTofTM technology</strong> and the enhanced quantitative capability of <strong>Tof-MRM data acquisition</strong>.&nbsp; The end result is class-leading quantitative performance in real everyday laboratory conditions, demonstrated by limits of detection and quantification superior to anything achieved before with high resolution MS.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_Xevo_G2_XS_Q_Tof_Quadrupole_Time_of_Flight_Mass_Spectrometry_2_d805c7aa49.jpg" alt="Waters Xevo G2-XS QTof Quadrupole Time-of-Flight Mass Spectrometry: Class-leading real-world quantitative sensitivity." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_Xevo_G2_XS_Q_Tof_Quadrupole_Time_of_Flight_Mass_Spectrometry_2_d805c7aa49.jpg 245w," sizes="100vw" width="900" height="312"></p><div><h4><strong>Highest quality, most comprehensive qualitative information</strong></h4><p>In addition to accurate quantitative profiles, complete understanding of a sample requires detailed and comprehensive qualitative information.</p><p><strong>MS<sup>E</sup></strong> is a simple but powerful approach that delivers accurate mass precursor and fragment ion data for every detectable component, whether chromatographically resolved or not.&nbsp; This represents the ultimate in qualitative information, and because the approach is un-targeted, the data can be interrogated again later as scientific questions evolve.</p><p><strong>FastDDA</strong> is an automated, targeted data acquisition method that provides rapid, intelligent accurate mass MS/MS capability for confirmation of known compounds or characterization of unknowns, for situations where only true MS/MS data will suffice.</p><h4><strong>Flexibility to adapt to changing needs</strong></h4><div><p>The growing emphasis on efficiency and productivity in the laboratory demands analytical systems that are not only robust and reliable, but that also have the flexibility to accomplish a wide variety of tasks today, with future-proofing for the innovations of tomorrow.&nbsp;</p><p><strong>Waters’ Universal Ion Source Architecture</strong> enables the use of a single analytical platform for many different applications and molecule types, as well as providing the option to add new functionality as requirements and priorities change.&nbsp; All source options are designed to be quickly interchangeable and ready to use within minutes, maximizing versatility and minimizing downtime.</p><div><h3><strong>Accessible to experts and non-experts alike</strong></h3><p>Traditionally the ability to achieve and maintain optimum performance from such a powerful analytical system would require a level of knowledge and experience held only by expert users.</p><p>The <strong>Xevo G2-XS QTof</strong> features <strong>IntelliStartTM technology</strong>, an intuitive user interface that automates routine tasks and ensures reproducible data of the highest quality, ensuring the full capability of the system is accessible to all.</p><p><strong>IntelliStart enables essential functions to be carried out automatically:</strong></p><ul><li>MS resolution and calibration checks</li><li>Simple setup of diverse experiments</li><li>Scheduled LC-MS system checks</li><li>Continuous system monitoring</li></ul><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_Xevo_G2_XS_Q_Tof_Quadrupole_Time_of_Flight_Mass_Spectrometry_3_279cf35277.jpg" alt="Waters Xevo G2-XS QTof Quadrupole Time-of-Flight Mass Spectrometry: Accessible to experts and non-experts alike." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_Xevo_G2_XS_Q_Tof_Quadrupole_Time_of_Flight_Mass_Spectrometry_3_279cf35277.jpg 136w," sizes="100vw" width="900" height="1038"></p></div></div></div></div></div></div>

Waters Xevo TQ-XS Triple Quadrupole Mass Spectrometer

Expanding your analytical capabilities with the next step in detection, the Xevo TQ-XS offers superior performance for your routine quantitative workflows.

<h4><strong>Superior performance in your routine quantitative analyses</strong></h4><p><strong>Expanding your analytical capabilities with the next step in detection, the Xevo TQ-XS offers superior performance for your routine quantitative workflows. &nbsp;With solutions for today’s needs and technologies to overcome tomorrow’s challenges, explore what the adaptable, flexible, and proven Xevo TQ-XS Tandem Quadrupole Mass Spectrometer coupled with ACQUITY UPLC can afford your laboratory’s productivity and capabilities. &nbsp;</strong></p><div><div><div><div><ul><li><strong>Expanding your efficiencies</strong>: Maximize your laboratory’s potential in high sensitivity quantitative analysis by extending your capabilities, confidently and productively</li><li><strong>Performance that’s proven</strong>: Trust the proven Xevo TQ-XS to meet the analytical demands of your challenging applications , injection after injection</li><li><strong>Digesting your data</strong>: Reduce the burden in data handling with flexible and adaptable software solutions to meet your application and quality system needs</li><li><strong>Supporting your success</strong>: Have confidence that you will exceed your analytical requirements using Waters end to end solutions with flexible service and application focused training and support</li></ul></div></div><div><div><h5><strong>Recommended Use</strong></h5><p>Quantitative analysis where <strong>high sensitivity instrument performance</strong> is required (e.g.,&nbsp;to reach <strong>low level concentrations (ppt)</strong>).</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_Xevo_TQ_XS_Triple_Quadrupole_Mass_Spectrometer_5e2d4a8690.jpg" alt="Waters Xevo TQ-XS Triple Quadrupole Mass Spectrometer: The Xevo TQ-XS System." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_Xevo_TQ_XS_Triple_Quadrupole_Mass_Spectrometer_5e2d4a8690.jpg 245w," sizes="100vw" width="1024" height="545"></p><div><div><h3><strong>Expand your analytical capabilities with enhanced sensitivity</strong></h3><p>Delivering the next step in reliable sensitivity, the <strong>Xevo TQ-XS</strong> enables your laboratory to expand your analytical capacity and productivity. Whether seeking more sensitivity to detect your analytes routinely, looking to extend your scope of analytes with increased confidence or revise your workflow to reduce time and costs, explore what <strong>Xevo TQ-XS</strong>, coupled with <strong>ACQUITY UPLC</strong> and <strong>ACQUITY Premier Systems</strong> can offer your lab.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_Xevo_TQ_XS_Triple_Quadrupole_Mass_Spectrometer_2_53f3f2443c.jpg" alt="Waters Xevo TQ-XS Triple Quadrupole Mass Spectrometer: Vancomycin: Xevo TQ-XS versus Xevo TQ-S. On average, the analyte area counts on Xevo TQ-XS were >10x higher than area counts on Xevo TQ-S for Vancomycin." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_Xevo_TQ_XS_Triple_Quadrupole_Mass_Spectrometer_2_53f3f2443c.jpg 245w," sizes="100vw" width="1024" height="295"></p></div></div><div><div><h3><strong>Proven performance you can trust for your challenging analyses</strong></h3><p>Whether looking to streamline your methods or advance your laboratory’s performance, explore how <strong>Xevo TQ-XS</strong>, coupled with <strong>LC (UPLC), GC (APGC) or SFC (UPC2)</strong> can benefit your challenging applications. Trust the proven <strong>Xevo TQ-XS</strong> to meet your <strong>analytical demands</strong>, injection after injection.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_Xevo_TQ_XS_Triple_Quadrupole_Mass_Spectrometer_3_fdd2e3d239.jpg" alt="Waters Xevo TQ-XS Triple Quadrupole Mass Spectrometer: Representative liraglutide LLOQ (0.5 ng/mL) chromatogram, extracted from plasma, demonstrating sensitivity and selectivity with Xevo TQ-XS." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_Xevo_TQ_XS_Triple_Quadrupole_Mass_Spectrometer_3_fdd2e3d239.jpg 245w," sizes="100vw" width="1024" height="536"></p></div></div><div><div><h3><strong>Software solutions to overcome a common bottleneck</strong></h3><p>While quantitation of targeted analytes can be a routine experiment, the volume of data acquired and generated for processing, review and management can be significant. <strong>Waters</strong>’ informatics platforms offer extensive toolsets to support efficient and compliant <strong>data handling</strong> to support your <strong>21 CFR 11 and ISO 17025</strong> environments.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_Xevo_TQ_XS_Triple_Quadrupole_Mass_Spectrometer_4_a3e46ecd44.jpg" alt="Waters Xevo TQ-XS Triple Quadrupole Mass Spectrometer: With the Xevo TQ-XS System, you’ll get robust results you can trust with the most demanding sample matrices." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_Xevo_TQ_XS_Triple_Quadrupole_Mass_Spectrometer_4_a3e46ecd44.jpg 234w," sizes="100vw" width="1024" height="683"></p></div></div><div><div><h3><strong>Accelerating your success with award winning service</strong></h3><p>Ensure your laboratory runs efficiently and is ready to address the opportunities of tomorrow with Waters comprehensive analytical solutions with expert training (<a target="_blank" rel="noopener noreferrer" href="https://www.waters.com/nextgen/global/services/instrument-services.html"><strong>APS</strong></a>) and flexible and cost-effective solutions to advance your business with system service <strong>(</strong><a target="_blank" rel="noopener noreferrer" href="https://www.waters.com/nextgen/global/services/instrument-services/flexchoice-instrument-service-coverage.html"><strong>FlexCHOICE</strong></a>), trade-ins and technological upgrades (<a target="_blank" rel="noopener noreferrer" href="https://www.waters.com/waters/FlexUP-Technology-Renewal-Program-%7C-Upgrade-Lab-Instruments/nav.htm?cid=135071972"><strong>FlexUP</strong></a>).</p></div></div></div></div></div></div>

Waters SELECT SERIES Cyclic IMS

The SELECT SERIES Cyclic IMS combines novel cyclic ion mobility separation with state-of-the-art, high performance, time-of-flight mass spectrometry.

<div><div id="title-c6692d35e8" data-locator="title-with-text"><h3><strong>Endless possibilities. Limitless research.</strong></h3></div></div><div><div id="text-ba9d3d94da" data-locator="text"><p><strong>Developed through focused collaboration, the SELECT SERIES Cyclic IMS combines novel cyclic ion mobility separation with state-of-the-art, high performance, time-of-flight mass spectrometry, enabling leading researchers to unlock the potential in scientific discovery.</strong></p><p>The SELECT SERIES Cyclic IMS enables selection of ions by both mass and mobility, a unique functionality of <strong>Cyclic Ion Mobility (cIM)</strong> that provides unparalleled flexibility and capabilities for research studies in both academia and industry. With ion mobility and mass spectrometry, you can separate by shape as well as&nbsp;<i>m/z</i>&nbsp;for separation of isomers, measure the <strong>Collisional Cross Section (CCS)</strong> of an ion, and achieve significantly cleaner mass spectral data.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_SELECT_SERIES_Cyclic_IMS_Novel_Cyclic_Ion_Mobility_c_IM_Technology_13abf6dd9b.jpg" alt="Waters SELECT SERIES Cyclic IMS: Novel Cyclic Ion Mobility (cIM) Technology." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_SELECT_SERIES_Cyclic_IMS_Novel_Cyclic_Ion_Mobility_c_IM_Technology_13abf6dd9b.jpg 234w," sizes="100vw" width="1024" height="682"></p><h3><strong>Overview</strong></h3><div data-locator="section-container-body"><div><div><div data-locator="layoutcontainer-"><div><div id="text-26eab4b89b" data-locator="text"><ul><li>Combine <strong>cyclic ion mobility (cIM) separation</strong> with <strong>ToF mass spectrometry</strong></li><li>Separate more than ever before with ultimate ion mobility resolution for complete confidence</li><li>Perform <strong>unique IMS<sup>n</sup> experiments</strong> for increased selectivity and advanced characterization</li><li>Enable <strong>pre-mobility mass selection</strong> and <strong>mobility selection of precursor and product ions</strong></li><li>Achieve increased experimental flexibility for solving complex problems with three distinct fragmentation regions</li></ul></div></div><div><div id="text-36ff553b5f" data-locator="text"><h3><strong>Recommended Use</strong></h3><p>For identifying and rapidly monitoring co-eluting, isomeric metabolites in chemical reactions</p><blockquote><p class="cke-user_style-important"><strong>Video: </strong><a target="_blank" rel="noopener noreferrer" href="https://www.youtube.com/watch?v=nauwVH0L91o"><strong>Waters SELECT SERIES Cyclic IMS</strong></a></p></blockquote><div><div id="text-8469d7776e" data-locator="text"><h3 data-locator="modal-title"><strong>Discover more with ultimate ion mobility resolution</strong></h3><p>The instrument design and control software enable a range of experiments, including acquisition of Tof data, Single pass ion mobility, and the ability to scale mobility resolution to match the complexity of a sample. Ion mobility resolution increases with the length of the mobility device and therefore with the number of passes.</p><figure class="image"><img style="aspect-ratio:1024/682;" src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_SELECT_SERIES_Cyclic_IMS_IMS_resolution_increases_with_the_number_of_passes_around_the_c_IM_device_121719dbe0.jpg" alt="Waters SELECT SERIES Cyclic IMS: IMS resolution increases with the number of passes around the cIM device. Demonstrated here by the separation of reverse sequence peptides SDGRG and GRGDS. The Arrival Time Distributions (ATDs) obtained after 100 passes around the device are inset." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_SELECT_SERIES_Cyclic_IMS_IMS_resolution_increases_with_the_number_of_passes_around_the_c_IM_device_121719dbe0.jpg 234w," sizes="100vw" width="1024" height="682"></figure><div><div id="text-bb2fb9f91c" data-locator="text"><h3 data-locator="modal-title"><strong>Unlock the potential in scientific discovery</strong></h3><p>The unique instrument design of the SELECT SERIES Cyclic IMS&nbsp;facilitates advanced ion mobility experiments like IMS<sup>n</sup>&nbsp;isolation. IMS<sup>n</sup>&nbsp;isolation&nbsp;extends the resolution of a specific mobility range,&nbsp;<i>e.g.,</i>&nbsp;ions of a specific species. Eject ions (without acquisition) outside of the desired mobility range, leaving the remaining species in the cIM to continue the separation process. This “trimming” approach can be undertaken numerous times and can be used, for example, to increase specificity of the selected ions or to prevent “wrap-around” in the cIM where high mobility ions catch up with low mobility ions in multi-pass experiments. Multiple cyclic sequences of different numbers of passes can be defined in one, multi-pass LC-MS method, increasing productivity by reducing the need for multiple injections of the same sample.</p></div></div><figure class="image"><img style="aspect-ratio:1024/578;" src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_SELECT_SERIES_Cyclic_IMS_Investigation_into_acyl_glucuronides_via_infusion_f3bf2c67e2.jpg" alt="Waters SELECT SERIES Cyclic IMS: Investigation into acyl glucuronides via infusion. Slicing enables further IMS separation of target metabolite (blue region) of interest and other ions can be ejected. Increasing the IMS resolution reveals an additional 4-O acyl. In collaboration with Imperial College London – Ian D. Wilson." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_SELECT_SERIES_Cyclic_IMS_Investigation_into_acyl_glucuronides_via_infusion_f3bf2c67e2.jpg 245w," sizes="100vw" width="1024" height="578"></figure><div><div id="text-78a4dc4d5e" data-locator="text"><h3 data-locator="modal-title"><strong>Undertake advanced structural characterization</strong></h3><p><strong>IMS<sup>n</sup>&nbsp;activation</strong>&nbsp;is ideal for <strong>advanced structural characterization</strong>. During mobility separation, excise a segment of the mobility separated species and send the ions to the pre array storage device. Unwanted ions are ejected, and the stored ions are then re-injected into the array under collision induced activation/dis-sociation conditions, as required, and subsequent mobility separation performed. The product ions can then be sent to the&nbsp;Tof<i>&nbsp;</i>for detection or can undergo further rounds of mobility selection providing the unique IMS<sup>n</sup>&nbsp;capability.</p></div></div><div><div id="text-079d02ceb8" data-locator="text"><h3 data-locator="modal-title"><strong>Imaging mass spectrometry with DESI XS and Cyclic IMS</strong></h3><p>The unique combination of&nbsp;<a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library?instrumentationItems=26&amp;mainauthorItems=5&amp;search=DESI+XS"><strong>DESI XS</strong></a><strong>&nbsp;</strong>with SELECT SERIES Cyclic IMS provides ultimate levels of specificity for <strong>MS imaging</strong> approaches. DESI XS produces a visual map of the spatial distribution of a wide range of analytes, for example small molecule drugs, metabolites, and lipids across the surface of a tissue sample, and the unique capabilities and modes of acquisition of Cyclic IMS enable comprehensive in-depth experiments to be performed.</p></div></div><div><div id="text-673d117887" data-locator="text"><h3 data-locator="modal-title"><strong>Increased sensitivity provides confidence in what you find</strong></h3><p>To complement the novel <strong>Cyclic Ion Mobility</strong> capability and for complete confidence in your data, the&nbsp;SELECT SERIES&nbsp;Cyclic IMS is equipped with the latest <strong>ToF technology</strong>. The XS transfer device maintains the fidelity of the ion mobility separation while simultaneously conditioning the ion beam for the absolute best time-of-flight performance. The new offset oa-Tof with dual gain detection system <strong>provides improved sensitivity, resolution &gt;100,000 (FWHM), reliable accurate exact mass measurements</strong> (low ppm), and <strong>improved dynamic range</strong>.</p><figure class="image"><img style="aspect-ratio:1024/682;" src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Mass_spectrum_highlighting_resolution_of_100_000_FWHM_on_the_7_charge_state_of_monomeric_9ff8f53204.jpg" alt="Waters SELECT SERIES Cyclic IMS: Mass spectrum highlighting resolution of >100,000 (FWHM) on the 7+ charge state of monomeric." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Mass_spectrum_highlighting_resolution_of_100_000_FWHM_on_the_7_charge_state_of_monomeric_9ff8f53204.jpg 234w," sizes="100vw" width="1024" height="682"></figure></div></div></div></div></div></div></div></div></div></div></div></div>

Waters Xevo TQ-S micro Triple Quadrupole Mass Spectrometry

From the inherently robust Xevo family, the Xevo TQ-S micro tandem quadrupole mass spectrometer provides superior performance per square inch and exceptional analytical flexibility.

<h3><strong>Defining Compact Performance</strong></h3><ul><li><strong>Robust Sensitivity Beyond Expectations</strong></li></ul><p><strong>From the inherently robust Xevo family, the Xevo TQ-S micro tandem quadrupole mass spectrometer provides superior performance per square inch and exceptional analytical flexibility.</strong></p><h4><strong>Reliable performance</strong></h4><p>Achieve your objectives in full with operational performance you can rely on. A Xevo TQ-S micro study analyzing mycotoxins in wheat flour (a complex matrix that can contaminate LC/MS instrumentation) showed consistent performance over 5 days of continuous use with 1000 injections and only 5-9% relative standard deviation (RSD) for peak areas.</p><h4><strong>Maximizing uptime</strong></h4><p>Get the most from your instrument and avoid time-consuming repair visits. Customers using the Xevo TQ-S micro will on average not need an unplanned service visit during the warranty period and for 3 years after.<strong>*</strong>&nbsp;</p><p><strong>*</strong>Source Waters internal service data on unplanned service visits for Xevo TQ-S micro issues that occur globally. Note that warranty period used is 1 year and planned visits for regular scheduled Performance Maintenance are recommended to ensure trouble-free operation</p><h4><strong>Achieve more with less</strong></h4><ul data-spread="false"><li>The Xevo TQ-S micro is 2-3X narrower than other instruments in its class, reducing laboratory space overhead costs.</li><li>Use of the Xevo TQ-S micro provides up to 34% lower electricity power consumption and associated heat production than other instruments in its class.</li></ul><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_Xevo_TQ_S_micro_Triple_Quadrupole_Mass_Spectrometry_With_benchspace_at_a_premium_choose_an_instrument_designed_to_maximize_performance_per_square_inch_15dba17d1b.jpg" alt="Waters Xevo TQ-S micro Triple Quadrupole Mass Spectrometry: With benchspace at a premium, choose an instrument designed to maximize performance per square inch." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_Xevo_TQ_S_micro_Triple_Quadrupole_Mass_Spectrometry_With_benchspace_at_a_premium_choose_an_instrument_designed_to_maximize_performance_per_square_inch_15dba17d1b.jpg 245w," sizes="100vw" width="1024" height="300"></p><h4><strong>Flexibility to meet your analytical needs&nbsp;</strong></h4><p>With the most commonly used atmospheric pressure ionization source of ESI as standard, simply change chromatographic inlet or ionization source to extend your analytical capacity and meet changing demands.</p><h3><strong>Reliable Performance</strong></h3><h4><strong>Keeping Variability to a Minimum</strong></h4><p>Be confident that you will have reliable data over multi-day studies. Two experiments using the Xevo TQ-S micro provide evidence for the longer-term stability of this instrument. By monitoring peak areas whilst running continuous injections, you can see that the Xevo TQ-S micro won’t let you down.</p><p><strong>Experiment 1</strong> – 4 mycotoxins in wheat flour showed consistent performance over 5 days of continuous use with 1,000 injections and only 5-9% RSD for peak areas.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_Xevo_TQ_S_micro_Triple_Quadrupole_Mass_Spectrometry_Experiment_1_showing_data_for_mycotoxins_in_wheat_flour_ad4c8cbe77.jpg" alt="Waters Xevo TQ-S micro Triple Quadrupole Mass Spectrometry: Experiment 1 showing data for mycotoxins in wheat flour." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_Xevo_TQ_S_micro_Triple_Quadrupole_Mass_Spectrometry_Experiment_1_showing_data_for_mycotoxins_in_wheat_flour_ad4c8cbe77.jpg 245w," sizes="100vw" width="1221" height="647"></p><p><strong>Experiment 2</strong> – Acetaminophen in protein precipitated plasma also showed consistent performance over 6 ½ days of continuous use with 2,400 injections and only 4% RSD for peak areas.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_Xevo_TQ_S_micro_Triple_Quadrupole_Mass_Spectrometry_Experiment_2_Acetominophen_in_protein_precipitated_plasma_0e5b14e7ac.jpg" alt="Waters Xevo TQ-S micro Triple Quadrupole Mass Spectrometry: Experiment 2 - Acetominophen in protein precipitated plasma." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_Xevo_TQ_S_micro_Triple_Quadrupole_Mass_Spectrometry_Experiment_2_Acetominophen_in_protein_precipitated_plasma_0e5b14e7ac.jpg 245w," sizes="100vw" width="1220" height="649"></p><p><strong>Less than 1%</strong> of Waters tandem quadrupole mass spectrometers require a detector replacement on an annual basis.<strong>*</strong></p><p><strong>*</strong>Source: Waters internal data on the service history of its tandem quadrupole mass spectrometers launched between 2006 and 2022.</p><h3><strong>Improving Efficiency</strong></h3><h4><strong>Lower Operational Costs and Improved Sustainability</strong></h4><p>As a leading technology innovator in chromatography, mass spectrometry, and thermal analysis instruments and software, Waters shares a common mission with our customers: to leave the world a better place than we found it. Many of our customers are actively working to address environmental sustainability while balancing the need to continually reduce operational costs. The Xevo TQ-S micro consumes less electricity than other instruments in its class and therefore produces less heat – lessening the need for air conditioning and lowering costs.</p><p><strong>Table 1:</strong> Instrument / Power Consumption / Heat Output</p><ul><li><strong>Waters Xevo TQ-S micro</strong> / 1250 W / 4,263 Btu/h</li><li><strong>Competitor B</strong> / 1452 W / 4,950 Btu/h</li><li><strong>Competitor A</strong> / 1600 W / 5,456 Btu/h</li><li><strong>Competitor C</strong> / 1960 W / 6,500 Btu/h</li></ul><blockquote><p><a target="_blank" rel="noopener noreferrer" href="https://www.waters.com/nextgen/us/en/account/sign-in.html"><strong>Xevo TQ-S micro Site Preparation Guide</strong></a><br>Note that power stated for scroll pump configuration. Option for rotary pump configuration is available</p><p>Power and heat outputs for mid tier TQ products, conversion factor 1W = 3.41 Btu/h</p></blockquote><h3><strong>Ultimate Productivity</strong></h3><h4><strong>Achieve More with Flexible Software Solutions</strong></h4><p>The Xevo TQ-S micro is available on both the waters_connect™ and MassLynx™ Software platforms, providing the ultimate flexibility to choose a future-proof solution to meet your lab requirements.</p><ul data-spread="false"><li><strong>waters_connect™:</strong> Our modern, app-based software platform delivers efficiency and usability benefits, including the unique Exception Focused Review (XFR) functionality that can save up to 50% of your data review time.</li><li><strong>MassLynx™: </strong>A well-established software package delivering market-leading versatility and flexibility for all application areas.</li></ul><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_Xevo_TQ_S_micro_Triple_Quadrupole_Mass_Spectrometry_Convert_data_into_meaningful_results_with_waters_connect_and_Mass_Lynx_028cc58bc8.jpg" alt="Waters Xevo TQ-S micro Triple Quadrupole Mass Spectrometry: Convert data into meaningful results with waters_connect and MassLynx." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_Xevo_TQ_S_micro_Triple_Quadrupole_Mass_Spectrometry_Convert_data_into_meaningful_results_with_waters_connect_and_Mass_Lynx_028cc58bc8.jpg 245w," sizes="100vw" width="1024" height="346"></p><h3><strong>Flexibility</strong></h3><h4><strong>Choose the Optimal Separation and Ionization Technique for Your Application</strong></h4><p>Waters' market-leading separation technologies include the ACQUITY™ UPLC™ family of LC systems and APGC™. Application flexibility is further enhanced by the range of quickly interchangeable ion source options made possible by universal ion source architecture.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_Xevo_TQ_S_micro_Triple_Quadrupole_Mass_Spectrometry_UPLCMRM_data_on_Xevo_TQ_XS_4f0ea1bc1f.jpg" alt="Waters Xevo TQ-S micro Triple Quadrupole Mass Spectrometry: UPLC/MRM data on Xevo TQ-XS with UniSpray ion source showing improved sensitivity for three compounds that would typically require a change in ionization technique for optimal analysis." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_Xevo_TQ_S_micro_Triple_Quadrupole_Mass_Spectrometry_UPLCMRM_data_on_Xevo_TQ_XS_4f0ea1bc1f.jpg 245w," sizes="100vw" width="1024" height="384"></p><h3><strong>Optimal Support</strong></h3><h4><strong>Ensure Your Success with World-Renowned Services</strong></h4><p>Waters Service and Support helps maintain system peak performance, minimize downtime, address scientific application challenges, and support stringent compliance requirements.</p><p><strong>Waters award-winning consistent quality support and professional services ensure your success wherever your laboratory is located in the world. With Waters Service and Support offerings* for your Xevo TQ-S micro, you can:</strong></p><h4><strong>Get up and running quickly&nbsp;</strong></h4><p>Get onsite training and consultation to integrate the Xevo TQ-S micro into your laboratory and assist with data migration and method transfer needs with Waters Professional Services.</p><h4><strong>Meet your lab’s unique requirements</strong></h4><p>Protect your high-performance instrument investment with comprehensive &nbsp;portfolio of service plans such as Waters FlexCHOICE™, which provides access to the most in-depth and up-to-date knowledge of the advanced science and technologies within Waters systems.</p><h4><strong>Facilitate compliance</strong></h4><p>Simplify the process of qualification, validation, and recordkeeping so that your business can focus on delivering products to market with Waters Compliance Services – so you can meet the regulations in your industry and in the countries where you conduct business.</p><h4><strong>Reduce total cost of ownership</strong></h4><p>FlexCAPITAL™<strong>**</strong> is designed to support continuous laboratory operation while satisfying the budgeting challenges of a constantly shifting landscape. Minimize total cost of ownership while optimizing instrument performance and protecting your organization from security risks associated with outdated software platforms.</p><h4><strong>Leverage your existing technology</strong></h4><p>With the FlexUP™ technology renewal program, you can upgrade your older tandem quadrupole mass spectrometry system to the Xevo TQ-S micro – improving performance, results, and productivity while controlling costs and mitigating compliance risk.</p><p><strong>*</strong>Availability of offerings varies by country. Contact Waters or your local Waters representative for details.</p><p><strong>**</strong>FlexCAPITAL payment plan options and availability may vary by country. Other restrictions may apply.</p>

Products focused on LC/MS/MS from Waters - page 2

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