EU Regulation 396/2005: Pesticide Residue Testing and the Critical Role of QuEChERS Evaporation in Food Safety

<div><div><p><strong>Researchers led by </strong><a target="_blank" rel="noopener noreferrer" href="https://kudova.group.uochb.cz/en"><strong>Eva Kudová</strong></a><strong> from IOCB Prague and Jitka Viktorová from UCT Prague have identified new androstane-based steroid derivatives that can significantly improve the effectiveness of existing antibiotics against multidrug-resistant </strong><i><strong>Staphylococcus aureus</strong></i><strong>.</strong></p></div></div><div><p>The team screened dozens of natural steroidal hormones and synthetic derivatives to see whether they could block bacterial efflux pumps – mechanisms that bacteria use to eject antibiotics and survive treatment. Two compounds emerged as particularly promising: they inhibited efflux pumps and lowered the effective doses of antibiotics such as ciprofloxacin and erythromycin.</p><p>Further analysis showed that one of the compounds also suppressed genes linked to bacterial virulence. Another key finding is that the most active molecules are non-toxic to human immune cells and showed no detectable endocrine activity, suggesting a favorable safety profile.</p><p>These findings support the idea that rationally designed steroid-based molecules could act as antibiotic adjuvants, helping existing drugs overcome bacterial resistance.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/IOCB_Prague_Steroidal_hormones_and_neurosteroids_novel_therapeutic_strategies_in_bacterial_infections_8e5d2a7b48.jpg" alt="IOCB Prague: Steroidal hormones and neurosteroids – novel therapeutic strategies in bacterial infections" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_IOCB_Prague_Steroidal_hormones_and_neurosteroids_novel_therapeutic_strategies_in_bacterial_infections_8e5d2a7b48.jpg 222w," sizes="100vw" width="1258" height="886"></p><blockquote><h4><strong>Original Article</strong></h4><h4><a target="_blank" rel="noopener noreferrer" href="https://www.sciencedirect.com/science/article/pii/S0223523426001613?via%3Dihub"><strong>Steroidal hormones and neurosteroids - novel therapeutic strategies in bacterial infections: Design, synthesis, and biological evaluation</strong></a></h4><p>Daniela Brdová, Bára Křížkovská, Jan Špaček, Zdeněk Míchal, Eva Jablonská, Ondřej Strnad, Hana Chodounská, Eszter Szánti-Pintér, Marina Morozovová, Václav Hanžl, Jan Tkadlec, Martijn Riool, Jan Lipov, Jitka Viktorová, Eva Kudová&nbsp;</p><p><i><strong>Eur. J. Med. Chem., 2026, 308, 118716</strong></i></p><p><a target="_blank" rel="noopener noreferrer" href="https://doi.org/10.1016/j.ejmech.2026.118716">https://doi.org/10.1016/j.ejmech.2026.118716</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><h4><strong>Abstract</strong></h4><p>The global rise of antibiotic resistance necessitates novel therapeutic strategies for infectious diseases. Inhibition of bacterial efflux pumps, which contribute to multidrug resistance, represents a promising approach to restore or even increase the efficacy of existing antibiotics. Using fluorescence-based ethidium bromide accumulation, broth microdilution, and checkerboard assays, we evaluated 26 endogenous steroidal hormones and neurosteroids, along with 30 synthetic derivatives, for their ability to enhance antibiotic susceptibility in multidrug-resistant <i>Staphylococcus aureus</i>. Structure-activity relationship analysis identified compounds <strong>13</strong> and <strong>16</strong> as lead candidates, exhibiting strong efflux pump inhibition and marked reductions in the minimum inhibitory concentrations of ciprofloxacin and erythromycin. Both compounds showed additive effects in checkerboard assays. Modifications at C-3 (polar substitution) and C-17 (3α,5β-stereochemistry and nonpolar substitution) were essential for potent efflux inhibition and sensitization, although these modifications were not additive when combined. Transcriptome analysis further revealed that compound <strong>13</strong> significantly downregulated <i>S. aureus</i> virulence-associated genes when administered alone or in combination with antibiotics. Cytotoxicity assessment in human peripheral blood mononuclear cells and receptor transactivation assays for estrogen, androgen, and progesterone receptors indicated that the most active derivatives were non-toxic and lacked detectable endocrine activity, suggesting a favorable safety profile. Overall, these findings support the concept that rationally designed andostane-based steroidal scaffolds can function as competitive bacterial efflux pump inhibitors and serve as potential antibiotic adjuvants to mitigate efflux-mediated resistance.</p><h4><strong>Instrumentation</strong></h4><h5><strong>Structural characterization</strong></h5><ul><li><strong>AVANCE III 400 MHz NMR spectrometer</strong> (Bruker)</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library?mainauthorItems=3&amp;search=LTQ+Orbitrap+XL"><strong>LTQ Orbitrap XL HRMS</strong></a> (Thermo Fisher Scientific, ESI)</li></ul></div>

Steroidal hormones and neurosteroids – novel therapeutic strategies in bacterial infections

<p><strong>Metformin is currently the first-line oral drug of choice for the treatment of type 2 diabetes. It reduces glucose production in the liver, improves tissue sensitivity to insulin, and does not cause weight gain or hypoglycemia, which sets it apart from some other antidiabetic drugs. Moreover, its long-term beneficial effects on the risk of cardiovascular complications and mortality in people with type 2 diabetes have been well established. Researchers from the Institute of Physiology CAS (IPHYS) have identified a new group of blood metabolites that could help physicians objectively monitor whether patients with type 2 diabetes are taking their metformin as prescribed.</strong></p><h4><strong>New biomarkers for metformin use</strong></h4><p>A team led by Tomáš Čajka from the Laboratory of Translational Metabolism at IPHYS analyzed plasma samples from <strong>637 patients with type 2 diabetes treated with metformin</strong> and <strong>143 non-diabetic controls</strong> using advanced metabolomics and lipidomics. Among 614 detected metabolites, they identified five from the group of <strong>N-lactoyl-amino acids </strong>(e.g. N‑lactoyl-phenylalanine), which had previously been seen as unknown signals due to missing reference spectra in databases. The levels of these metabolites in the blood closely reflected the plasma concentrations of metformin. In patients with the highest metformin exposure, the concentrations of these metabolites were up to 7.2 times higher than in controls.</p><h4><strong>A sensitive “fingerprint” of the drug’s effect</strong></h4><p>N-Lactoyl-amino acids are formed in cells by combining lactate and amino acids, thus reflecting the metformin-induced changes in cellular energy metabolism. “<i>Importantly, even though they occur in plasma only at nanomolar concentrations, they reliably distinguish patients who take metformin regularly from those who take it irregularly or not at all</i>,” emphasizes T. Čajka.</p><h4><strong>Metabolomics in practice and international collaboration</strong></h4><p>The study also provides a detailed description of broader metabolic changes in type 2 diabetes, including increases in lactate, organic acids, and branched-chain amino acids, as well as extensive remodelling of the lipid profile. In addition to T. Čajka’s team, collaborators from the Institute for <strong>Clinical and Experimental Medicine in Prague</strong> and the <strong>West Coast Metabolomics Center</strong> (University of California, Davis) also participated in the study.</p><p>The results demonstrate that advanced metabolomics approaches developed at IPHYS within the <strong>CarDia project</strong> can find highly practical applications both in clinical studies and in personalized monitoring of treatment in patients with diabetes.</p><blockquote><h4><strong>The original article</strong></h4><h4><a target="_blank" rel="noopener noreferrer" href="https://ascpt.onlinelibrary.wiley.com/doi/10.1002/cpt.70205"><strong>Untargeted Metabolomics Identifies N-Lactoyl-Amino Acids as Dose-Responsive Plasma Biomarkers of Metformin Adherence in Type 2 Diabetes</strong></a></h4><p>Tomas Cajka, Jiri Hricko, Lucie Rudl Kulhava, Michaela Paucova, Michaela Novakova, Veronika Hola, Stanislava Rakusanova, Oliver Fiehn, Vojtech Skop, Ivana Lankova, Iva Miskova, Terezie Pelikanova, Martin Haluzik</p><p>Clin Pharmacol Ther, 119: 1057-1069</p><p><a target="_blank" rel="noopener noreferrer" href="https://doi.org/10.1002/cpt.70205">https://doi.org/10.1002/cpt.70205</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><h4><strong>Abstract</strong></h4><p>Metformin is the most widely prescribed antidiabetic drug, yet adherence remains difficult to objectively assess. Using untargeted metabolomics and lipidomics, we analyzed plasma from 637 patients with type 2 diabetes (T2D) with confirmed metformin use and 143 nondiabetic controls, annotating 614 metabolites. Patients were stratified by plasma metformin into sub-therapeutic, therapeutic, and supra-therapeutic groups, and associations were evaluated by multiple linear regression and composite metabolite ranking. Five previously unannotated features were structurally identified as N-lactoyl-amino acids, whose levels correlated strongly with plasma metformin (ρ = 0.42–0.55, P &lt; 0.0001) and increased up to 7.2-fold in the supra-therapeutic group (&gt; 2000 ng/mL). While N-lactoyl-amino acids were consistently detected in the nanomolar range, they still displayed robust and dose-dependent associations with metformin. Broader metabolic changes in T2D included elevated lactate, organic acids, and branched-chain amino acids, together with reduced urea cycle metabolites. Lipidomics showed increases in saturated triacylglycerols and diacylglycerols and decreases in cholesteryl esters, sphingomyelins, and phospholipids. These findings establish N-lactoyl-amino acids as robust, dose-responsive plasma biomarkers of metformin exposure. Despite being up to four orders of magnitude less abundant than their amino acid precursors, they sensitively reflect mitochondrial lactate overflow and pharmacodynamic adaptation, offering objective assessment of adherence.</p>

New blood biomarkers reveal how faithfully diabetes patients take metformin

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The Czech Academy of Sciences (CAS) was established by Act No. 283/1992 Coll. as the Czech successor of the former Czechoslovak Academy of Sciences. It is set up as a complex of 54 public research institutions.

Czech Academy of Sciences

The Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences (IOCB Prague) is a leading scientific institution in the Czech Republic, recognized internationally. Its primary mission is basic research in the fields of chemical biology and medicinal chemistry, organic and material oriented chemistry, chemistry of natural compounds, biochemistry and molecular biology, physical chemistry, theoretical chemistry, and analytical chemistry. 

Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences

Organomation, founded in 1959, designs and manufactures high-quality nitrogen evaporators and extraction systems. Known for innovation and durability, their lab instruments are used globally for efficient sample preparation with strong customer support.

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The UPLC method resulted in a 4x reduction in run time and a 10x reduction in solvent consumption resulting in improved sample throughput and reduced cost per analysis." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_UPLC_H_Class_PLUS_System_2_97e7735374.jpg 245w," sizes="100vw" width="1024" height="613"></p></div></div><div><div><h3><strong>Discover the best method for the best results</strong></h3><p>Get the <strong>versatility</strong> to discover the best set of chromatographic conditions for your sample, providing a <strong>more robust method</strong>. The flexibility of the <strong>ACQUITY UPLC H-Class PLUS Quaternary System</strong> allows you to <strong>automatically screen important method parameters</strong>, including:</p><ul><li>Up to <strong>six columns</strong> in independently temperature-controlled compartments</li><li>pH and ionic strength with <a target="_blank" rel="noopener noreferrer" href="https://www.waters.com/waters/Auto%E2%80%A2Blend-Plus/nav.htm?cid=134623262"><strong>Auto•Blend Plus</strong></a><strong> Technology</strong></li><li><strong>Optional and integrated solvent selection valve</strong> expands access to six additional mobile phase lines&nbsp;</li><li><strong>11 unique gradient profiles</strong></li></ul><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_UPLC_H_Class_PLUS_System_3_fc2b3f925b.jpg" alt="Waters ACQUITY UPLC H-Class PLUS System: (A) Auto·Blend Plus method gradient table for trastuzumab pH optimization. (B) pH optimization on trastuzumab charge variants separation. Gradient: 20 mM MES buffer, 50–155 mM NaCl in 15 min." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_UPLC_H_Class_PLUS_System_3_fc2b3f925b.jpg 245w," sizes="100vw" width="1024" height="622"></p></div></div><div><div><h3><strong>Deliver greater speed and precision for routine analyses</strong></h3><p>The <strong>ACQUITY UPLC H-Class PLUS Binary System</strong> combines the <strong>proven reliability and performance</strong> of the H-Class PLUS System with the <strong>precision and lowest system volume</strong> offered by our <strong>high-pressure mixing binary solvent manager</strong>, allowing you to:</p><ul><li>Accommodate the <strong>most challenging sample matrices</strong></li><li>Tackle applications with <strong>long shallow gradients</strong></li><li><strong>Improve the throughput</strong> of your methods</li></ul><p><strong>Combine </strong>the capabilities of the <strong>ACQUITY UPLC H-Class PLUS Binary System</strong> with <strong>Waters </strong><a target="_blank" rel="noopener noreferrer" href="https://www.waters.com/waters/global/Tandem-Quadrupole-%28-Triple-Quadrupole-%29-Mass-Spectrometry/nav.htm?cid=134656172"><strong>Tandem quadruple technology</strong></a><strong> </strong>for routine quantitative UPLC-MS/MS applications, so you can confidently quantify and trace components in the most complex of samples.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_UPLC_H_Class_PLUS_System_4_618bbb6347.jpg" alt="Waters ACQUITY UPLC H-Class PLUS System: Direct transfer without a gradient delay offers the opportunity for method improvement with the analysis time going from 5 minutes to 3 minutes representing a 40% reduction in runtime." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_UPLC_H_Class_PLUS_System_4_618bbb6347.jpg 245w," sizes="100vw" width="1024" height="600"></p><h3><strong>Specifications</strong></h3><ul><li><strong>Maximum operating pressure</strong>: 15,000 psi</li><li><strong>pH range</strong>: 1–12.5 (<i><span>For specific test conditions, contact your Waters sales representative)</span></i></li><li><strong>Operating flow rate range</strong>: Up to 2.2 mL/min</li><li><strong>Sample flow path</strong>: Stainless-steel</li><li><strong>Sample carryover</strong>: ≤0.002% (Caffeine) under UV conditions</li><li><strong>Sample compartment</strong>: 4–40 °C</li><li><strong>Pump options</strong>: Binary, Quaternary</li><li><strong>Solvent conditioning</strong>: Active Pre-heating</li><li><strong>Column tracking</strong>: eCord Technology tracks column information and archives column usage</li><li><strong>Column capacity</strong>: Up to 6 columns of 150 mm length and up to 4.6 mm I.D.</li><li><strong>Maximum sample capacity</strong>: Up to 20 plates (with Sample Organizer)</li><li><strong>Detector options</strong>:&nbsp;<ul><li>PDA Detector</li><li>TUV Detector</li><li>FLR Detector</li><li>RI Detector</li><li>ELS Detector</li><li>Mass Spectrometers</li></ul></li><li><strong>External control</strong>:&nbsp;<ul><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/627">Empower Software</a></li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/635">MassLynx Software</a></li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/1544">waters_connect</a></li><li>UNIFI Scientific Information System</li></ul></li><li><strong>Physical specifications</strong> <strong>(QSM or BSM, SM-FTN, CHA):</strong><ul><li>Width: 34.3 cm (13.5 in.)</li><li>Height: 71.1 cm (28.0 in.)</li><li>Depth: 71.2 cm (28.0 in.)</li></ul></li></ul></div></div></div></div></div></div></div></div>

Waters ACQUITY UPLC I-Class PLUS System

With the ACQUITY UPLC I-Class PLUS System, your lab can achieve highly efficient, rapid separations from ultra-low dispersion and delay volume.

<div><div><h4><strong>Complex chromatography challenges, solved</strong></h4></div></div><div><div><p><strong>Looking for answers to the most complex scientific challenges is what you do, and the scientific tools you deploy and the information they provide can make all the difference. With industry-leading separations performance, the ACQUITY UPLC I-Class PLUS System provides new possibilities for maximizing the resolution and sensitivity of your methods, enhancing the characterization of your samples, and improving productivity to advance the science of your laboratory.</strong></p><div><div><div><div><p>With the <strong>ACQUITY UPLC I-Class PLUS System</strong>, your lab can achieve <strong>highly efficient, rapid separations</strong> from <strong>ultra-low dispersion and delay volume</strong>. The system enables your lab to get <strong>narrow, ultra-efficient peaks</strong>, enhancing the <strong>sensitivity of any mass spectrometer</strong> and simplifying the characterization of the most complex sample.</p><ul><li><strong>Achieve precise and accurate binary solvent blending</strong> with the Binary Solvent Manager, ideal for up to four solvents with integrated solvent-select valve</li><li><strong>Get sample injection versatility</strong>, depending upon your application with the flow-through needle and fixed loop injector options</li><li><strong>Manage ultra-low carryover</strong> through programmable method settings to ensure compatibility even with the most sensitive mass spectrometers</li><li><strong>Get accurate temperature control</strong> across the entire column, configurable for 1 to 2 columns with active preheating</li><li><strong>Improve the performance of any mass spectrometer</strong> with the highest chromatographic resolution which minimizes interference from co-elutions</li><li><strong>Minimize the time and cost</strong> associated with annual qualification with the Waters Empower-based automated system qualification tool (SQT)</li><li><strong>Supported by Empower, Masslynx, UNIFI</strong>, and several third-party software packages</li></ul></div></div><div><div><h5><strong>Recommended Use</strong></h5><p><strong>Enhance the characterization of your samples</strong>, while <strong>improving productivity</strong> to advance the science of your laboratory.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_UPLC_I_Class_PLUS_System_9b05f209f6.jpg" alt="Waters ACQUITY UPLC I-Class PLUS System: ACQUITY UPLC I-Class PLUS System FTN-H PDA angled." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_UPLC_I_Class_PLUS_System_9b05f209f6.jpg 245w," sizes="100vw" width="1024" height="637"></p><div><div><div><div><h3><strong>Get a clearer picture of your sample</strong></h3><p>Get improved resolution through <strong>reduced system dispersion</strong> with the <strong>ACQUITY UPLC I-Class PLUS System</strong>, providing separations that can amplify your research.</p><p><strong>Shorten analysis times</strong>, <strong>reduce solvent usage</strong>, and <strong>speed access to the data</strong> you need for critical decisions. Designed to fit into your existing LC workflow, the ACQUITY UPLC I-Class PLUS System provides a <strong>clear view into what lies within the sample</strong>.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_UPLC_I_Class_PLUS_System_2_c2d3e9e7d9.jpg" alt="Waters ACQUITY UPLC I-Class PLUS System: In this example, the impurity analysis of tetracaine was run under the same conditions on the ACQUITY UPLC I-Class PLUS System (system band spread of 4 µL) and a UHPLC system (system band spread of 20 µL). Significantly better resolution was achieved on the ACQUITY UPLC I-Class PLUS System." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_UPLC_I_Class_PLUS_System_2_c2d3e9e7d9.jpg 245w," sizes="100vw" width="1024" height="595"></p></div></div></div></div></div></div></div></div><div><div><h3><strong>An inlet that improves the performance of any MS</strong></h3><p>The ACQUITY UPLC I-Class PLUS System is designed specifically for the <strong>rapid pace of laboratories</strong> on the <strong>cutting edge of research</strong> where <strong>LC-MS plays a critical role</strong>.</p><p><strong>With the ACQUITY UPLC I-Class PLUS System, your lab will:</strong></p><ul><li><strong>Improve resolution and ionization efficiency</strong> with narrow peak widths, enhancing <strong>mass spectrometry sensitivity</strong></li><li><strong>Enhance sensitivity</strong> through <strong>industry-leading carryover performance</strong></li><li><strong>Improve sample characterization</strong> through <strong>selective isolation</strong> with multidimensional UPLC configurations</li><li><strong>Achieve exceptionally fast analysis times</strong> with <strong>ultra-low delay volume</strong></li><li><strong>Achieve ultimate peak capacity</strong> with <strong>CORTECS Columns</strong></li></ul><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_UPLC_I_Class_PLUS_System_3_d8d5bb46be.jpg" alt="Waters ACQUITY UPLC I-Class PLUS System: A high sensitivity UPLC-MS/MS bioanalytical methodology for the quantification of midazolam and imipramine in rat plasma using the Xevo TQ Absolute Tandem Quadrupole Mass Spectrometer in combination with an ACQUITY UPLC I-Class PLUS System." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_UPLC_I_Class_PLUS_System_3_d8d5bb46be.jpg 182w," sizes="100vw" width="1024" height="878"></p></div></div><div><div><h3><strong>Achieve ultimate peak capacity with CORTECS Columns</strong></h3><p>When paired with <a target="_blank" rel="noopener noreferrer" href="https://www.waters.com/nextgen/global/products/columns/cortecs-columns.html"><strong>CORTECS 1.6 µm solid-core columns</strong></a>, the ACQUITY UPLC I-Class PLUS System enables scientists to achieve new levels of resolution, sensitivity, and chromatographic performance. With <strong>CORTECS Columns</strong> and the ACQUITY UPLC I-Class PLUS System, you can increase resolution for even your toughest samples and get the flexibility and power you need to rapidly separate a wide array of compounds.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_UPLC_I_Class_PLUS_System_4_2dfd32bd0d.jpg" alt="Waters ACQUITY UPLC I-Class PLUS System: By pairing the ultra-low dispersion ACQUITY UPLC I-Class PLUS System with high-efficiency CORTECS Columns, you’ll achieve new levels of UPLC performance. These 1.6 µm columns deliver exceptional levels of efficiency, performance, and throughput, resulting in narrower peaks and higher peak capacity." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_UPLC_I_Class_PLUS_System_4_2dfd32bd0d.jpg 210w," sizes="100vw" width="1024" height="761"></p><h3><strong>Specifications</strong></h3><ul><li><strong>Maximum operating pressure</strong>: 18,000 psi</li><li><strong>pH Range</strong>*: 1–12.5</li><li><strong>Operating flow rate range</strong>: Up to 2.0 mL/min</li><li><strong>Sample flow path</strong>: Stainless-steel</li><li><strong>Sample carryover</strong>: &lt;0.001% (Caffeine) under UV conditions</li><li><strong>Sample compartment</strong>: 4–40 °C</li><li><strong>Pump options</strong>: Binary</li><li><strong>Solvent conditioning</strong>: Active Pre-heating</li><li><strong>Column tracking</strong>: eCord Technology tracks column information and archives column usage</li><li><strong>Column capacity</strong>: Up to 2 columns of 150 mm length and up to 4.6 mm I.D.</li><li><strong>Maximum sample capacity</strong>: Up to 20 plates (with Sample Organizer)</li><li><strong>Detector options</strong>:&nbsp;<ul><li>PDA Detector</li><li>TUV Detector</li><li>FLR Detector</li><li>RI Detector</li><li>ELS Detector</li><li>Mass Spectrometers</li></ul></li><li><strong>External control</strong>:&nbsp;<ul><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/627">Empower Software</a></li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/635">MassLynx Software</a></li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/1544">waters_connect</a></li><li>UNIFI Scientific Information System</li></ul></li><li><strong>Physical specifications (QSM or BSM, SM-FTN, CHA):</strong><ul><li>Width: 34.3 cm (13.5 in.)</li><li>Height: 71.1 cm (28.0 in.)</li><li>Depth: 71.2 cm (28.0 in.)</li></ul></li></ul></div></div></div></div>

Waters ACQUITY Arc LC System

The ACQUITY™ Arc™ System is an all-in-one platform for HPLC and UHPLC, designed for robust method development and seamless transfer between modern LC systems, addressing a wide range of analytical challenges.

<p class="cke-user_style-important"><strong>Built upon a foundation of reliability</strong></p><p data-pm-slice="1 1 []"><strong>The method development process is changing. New regulations, software and analytical technologies are rapidly changing how methods are designed, transferred, and monitored over their lifecycle. An all-in-one platform for HPLC and UHPLC separations, the ACQUITY™ Arc™ System is designed to meet the spectrum of challenges you face from robust method development to seamless transfer between any modern LC systems.</strong></p><p data-pm-slice="1 1 []">With the <strong>ACQUITY Arc System</strong>, you can experience true plug-and-play method compatibility for HPLC and UHPLC separations. Significant productivity gains can be realized by deploying a single LC platform that allows for the efficient transfer, adjustment, and improvement of methods from any LC platform without compromise in method integrity.</p><figure class="image"><img style="aspect-ratio:768/886;" src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_Arc_System_63246061ea.jpg" alt="Waters ACQUITY Arc System" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_Arc_System_63246061ea.jpg 136w," sizes="100vw" width="768" height="886"></figure><p data-pm-slice="1 1 []">Laboratory-driven organizations have relied on Waters for over 60 years to deliver reliable, robust, and reproducible solutions to ensure confidence in their analytical results. With over 100,000 LC systems installed, we understand the significant impact the right technology has on your business, and the implications it has on characterizing the quality and safety of your products.</p><p data-pm-slice="1 1 []">Methods with greater agility, robustness, and capacity for change can help you reduce regulatory burden, risk of failure and costs. Visit <a disabled="true">www.methods.waters.com</a> to learn more about how method life cycle management (MLCM) connects your method today to your method tomorrow.</p><h3><strong>Designed for discovery to routine QC applications</strong></h3><p>The <strong>ACQUITY Arc System</strong> is the only available LC system with regulatory compliant-ready hardware and software for both HPLC and UHPLC separations in one instrument. With unrivaled column capacity and Arc Multi-flow path™ technology, the<strong> ACQUITY Arc System</strong> allows you to generate new methods and modernize legacy HPLC methods faster than ever before.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_Arc_System_2_c06ba42baa.jpg" alt="Waters ACQUITY Arc System: The ACQUITY Arc System can replicate your established HPLC methods by compensating for these differences with unique features such as the Arc Multi-Flow Path technology and Gradient SmartStart. These innovative attributes enable seamless replication of your existing chromatographic results to meet your acceptance criteria without changes to validated gradient tables." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_Arc_System_2_c06ba42baa.jpg 234w," sizes="100vw" width="1024" height="682"></p><h4><strong>Comprehensive detector portfolio</strong></h4><p>High-performance analytical detectors designed to maximize HPLC and UHPLC performance, delivering exceptional sensitivity and linearity for your assays.</p><p>Photodiode array, UV/Vis, fluorescence, refractive index, evaporative light scattering, and mass detection, including the ACQUITY QDa™ Detector.</p><h4><strong>Gradient SmartStart</strong></h4><p>Automatically manage gradient start time and pre-injection steps to maximize sample throughput. Automatically counteract differences in system dwell volume without the need to alter gradient table inputs.</p><h4><strong>Quaternary solvent management</strong></h4><p>Precise and accurate blending of up to four solvents with automated solvent compressibility compensation. Increase solvent flexibility with an optional, integrated solvent select valve, providing access to six additional solvents.</p><h4><strong>Negligible carryover</strong></h4><p>Advanced flow-through needle design minimizes carryover by continuously cleansing the needle during run. User-configurable wash settings provide flexibility to address even the most complex sample matrices.</p><h4><strong>Thermal management options</strong></h4><p>Column manager options available for up to 15 columns ranging in length from 50 mm to 300 mm, with a temperature range of 4 °C to 90 °C. Integrated column selection valve options provide unattended, fast column changeover.</p><h4><strong>Auto•Blend™ Plus Technology</strong></h4><p>Program gradients directly in terms of pH and ionic strength to minimize manual mobile phase preparation, reduce potential for human error, and accelerate method robustness testing for chromatographic methods.</p><h4><strong>Arc Multi-flow path technology</strong></h4><p>Delivers plug-and-play method compatibility with HPLC or UHPLC methods with the flip of a switch.</p><p>Easily replicate or improve established methods by simply selecting between Path 1 (HPLC) or Path 2 (UHPLC) without any manual user intervention.</p><h4><strong>Column Technology</strong></h4><p>Industry-leading selectivity choices to meet the needs of virtually every LC application.</p><h4><strong>Laboratory Informatics</strong></h4><p>Software control within your existing Empower™ or MassLynx™ infrastructure.</p><h3><strong>Replicate your established methods</strong></h3><p data-pm-slice="1 1 []">The <strong>ACQUITY Arc System</strong>, enabled by unique Arc Multi-flow path technology, easily accepts and replicates methods from any HPLC platform, without compromise.&nbsp;</p><p data-pm-slice="1 1 []">Whether you are trying to replicate an out-of-date HPLC method, transfer methods across the organization, or to contract partners, the <strong>ACQUITY Arc System</strong> gives you ultimate flexibility to reproduce, modernize, and transfer existing methods with ease and greater cost efficiency, while preserving the integrity of your methods.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_Arc_System_3_c8c7901de3.jpg" alt="Waters ACQUITY Arc System: Analysis run on a Vendor X LC system and replicated on the ACQUITY Arc System. Conditions: 15 to 35% B in 3 min, 35 to 95% B in 2 min; Mobile phase A: 0.1% HCOOH in H 2 O, mobile phase B: 0.1% HCOOH in ACN; Flow rate = 2.0 mL/min; Column: XSelect™ CSH C 18 , 4.6 x 150 mm, 5 μm; Temp. = 30 °C; UV@ 260 nm; 10.0 μL injection volume." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_Arc_System_3_c8c7901de3.jpg 245w," sizes="100vw" width="1099" height="596"></p><p>Upgrade your laboratory with a versatile, modern LC system that delivers HPLC and UHPLC method compatibility at the flip of a switch.</p><h3><strong>Modernize your methods</strong></h3><p>The United States Pharmacopeia (USP) is championing pharmacopeial harmonization and modernization efforts, and international organizations are following suit. As a result, the USP is encouraging the modernization of older compendial methods to ensure they are fit for purpose.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_Arc_System_4_a1aaab8d02.jpg" alt="Waters ACQUITY Arc System: Quetiapine fumarate system suitability solution analyzed on the ACQUITY Arc System using HPLC, UHPLC, and UPLC™ column/method conditions for the quetiapine impurity method. Peak identification: (1) quetiapine related compound G, (2) quetiapine related compound B, (3) quetiapine desethoxy, and (4) quetiapine." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_Arc_System_4_a1aaab8d02.jpg 245w," sizes="100vw" width="1092" height="678"></p><p>Revisions to these guidelines give you more flexibility to modify your existing pharmacopeial methods with modern techniques and technologies, and in some cases avoid revalidation. The <strong>ACQUITY Arc System</strong>, featuring the Waters Columns Calculator, allows you to confidently scale your gradient methods from a 3.5 μm to a 2.5 μm particle, decreasing run times, lowering solvent consumption, and increasing sample throughput.</p><h3><span><strong>Save time. Reduce cost.</strong></span></h3><p data-pm-slice="1 1 []">With the right column, the <strong>ACQUITY Arc System</strong> is the ideal solution to accommodate methods from any LC platform.&nbsp;</p><p data-pm-slice="1 1 []">From concept to production, the transition your product takes through the product development cycle often requires rigorous LC assays to properly characterize and assess its readiness to advance to the next stage. These LC assays are often adapted to accommodate the technology available from one stage to the next, in some cases requiring an adjustment from a smaller particle size (sub-2-μm) to a larger particle size (2.5 μm–5 μm).</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_Arc_System_5_d9dd95135c.jpg" alt="Waters ACQUITY Arc System: The ACQUITY Arc System enables the support of HPLC and UHPLC methods on a single platform." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_Arc_System_5_d9dd95135c.jpg 173w," sizes="100vw" width="959" height="860"></p><p>The <strong>ACQUITY Arc System</strong> provides the flexibility to maximize productivity through efficient and rapid 2.5 μm–2.7 μm UHPLC separations, or to accommodate larger 3.0 μm–5 μm HPLC particles.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_Arc_System_6_1ebc2c67e7.jpg" alt="Waters ACQUITY Arc System: Save time. Reduce cost." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_Arc_System_6_1ebc2c67e7.jpg 245w," sizes="100vw" width="1683" height="469"></p><h3><span><strong>Mitigate your risk</strong></span></h3><p data-pm-slice="1 1 []">With an expanded range of column manager options enabling up to 15-column switching from 4 °C to 90 °C, the <strong>ACQUITY Arc System</strong> will help you significantly reduce the time spent generating robust methods. Equipped with the plug-and-play ACQUITY QDa Mass Detector, the <strong>ACQUITY Arc System</strong> tracks peaks in your method and reveals hidden coelutions of similar analytes, ensuring you have complete confidence in the reliability and reproducibility of your method now and far into the future.</p><h4><strong>Thermal management options</strong></h4><p data-pm-slice="1 1 []">Active and passive pre-heating options available, with up to 15-column switching from 4 °C to 90 °C. Automated monitoring and tracking of column usage with eCord™ technology available with active pre-heating options.</p><h4><strong>Quaternary solvent management</strong></h4><p data-pm-slice="1 1 []">Accelerate your method development with precise and accurate blending of up to four solvents. Increase solvent flexibility with an optional solvent select valve, providing access to six additional solvents.</p><h4><strong>Auto•Blend Plus Technology</strong></h4><p data-pm-slice="1 1 []">Reduce human error and accelerate method robustness testing for chromatographic methods by programming gradients to control mobile phase pH and ionic strength.</p><h4><strong>Comprehensive detector portfolio</strong></h4><p>Diverse portfolio of detectors for method development, method transfer, and routine use.</p><h4><strong>ACQUITY QDa Detector</strong></h4><p>Mass detection built around the needs of analytical scientists for chromatographic analysis. Robust, reliable and requiring no adjustments, it easily integrates with your<strong> ACQUITY Arc System.</strong></p><h5><strong>Support</strong></h5><p data-start="0" data-end="175">Empower eLearning modules to help train your lab on Empower 3 and Method Validation. Applications support that’s customized based on your method development needs.</p><h5><strong>Consumables</strong></h5><p data-start="177" data-end="410" data-is-last-node="">Industry-leading selectivity choices to meet the needs of virtually every LC application. Quality Control (QC) Reference Material benchmarks your <strong>ACQUITY Arc System </strong>and enables perfect resolution. Certified clean vials.</p><h5><strong>Laboratory Informatics</strong></h5><p>Software control within your existing Empower or MassLynx infrastructure. Empower 3 Method Validation Manager allows you to perform chromatographic method validation in one application. Optional S-Matrix Fusion Software automates your method development according to AQbD guidelines.</p><h3><span><strong>Develop methods that stand the test of time</strong></span></h3><p>Need an orthogonal detection approach to UV in your method development? Streamline your method development with an LC-MS solution that’s as easy to use as photodiode array detection.</p><p>The <strong>ACQUITY Arc System</strong> is fully compatible with the ACQUITY Arc, supporting efficient and robust method development by expanding the information you can get from your system using the same Empower Software. The system automatically pairs qualitative mass spectral data to the peaks in your chromatogram, leaving nothing to chance.</p><ul><li>Confirm the identity of peaks in a separation without injecting standards.</li><li>Identify new peaks in a separation with molecular weight information.&nbsp;</li><li>Detect unresolved peaks and determine if a peak is homogeneously pure.</li><li>Easily track peaks as method conditions are changed.</li></ul><p data-start="272" data-end="600">Using Empower 3 Software and its Custom Calculations and Custom Reporting functions enables you to quickly and automatically evaluate chromatographic data. Configurable reports allow you to choose optimal conditions based on metrics rather than judgment, ensuring a comprehensive assessment of data and best method conditions.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_Arc_System_7_e7ef959203.jpg" alt="Waters ACQUITY Arc System: Method transfer of USP Assay for Fluconazole using the ACQUITY Arc System. Here the peak has same m/z of a related compound. Conditions: Mobile phase: 20:80 acetonitrile/ water; Flow rate = 0.5 mL/min; Column: XSelect HSS T3, 4.6 x 150 mm, 3.5 μm; UV@ 260 nm; 20.0 μL injection volume." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_Arc_System_7_e7ef959203.jpg 224w," sizes="100vw" width="939" height="654"></p><h3><strong>Streamline your workflow</strong></h3><div><div data-message-author-role="assistant" data-message-id="7b732be9-0a45-45fb-b585-70a90c1a74d6" dir="auto" data-message-model-slug="gpt-4o"><div><div><p data-start="602" data-end="827">How would you benefit from increased assay consistency between analysts and from lab to lab? What would you gain by accelerating your robustness testing prior to transferring methods to QA/QC?</p><p data-start="829" data-end="1392" data-is-last-node="">Auto•Blend Plus Technology is a novel software tool that extends traditional quaternary solvent blending to permit gradient programming directly in units of pH and ionic strength, providing the ability to vary composition in even the smallest increments of pH (even those differing by 0.1 pH units or less).&nbsp;</p><p data-start="829" data-end="1392" data-is-last-node="">With Auto•Blend Plus, the cumbersome and error-prone approach of manually preparing several pre-mixed mobile phases can now be eliminated with on-demand mobile phase creation, providing significant time savings and improved productivity to the laboratory.</p></div></div></div></div>

Products focused on HPLC - page 8

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