At MSACL 2025, a Thermo Fisher Scientific–sponsored workshop led by Qin Fu addressed one of the most persistent challenges in proteomics: how to efficiently and reproducibly translate biomarker discoveries into clinically meaningful assays. Drawing on experience spanning academia and industry—including prior work in Jennifer Van Eyk’s lab—Fu shared practical insights into building a scalable, end-to-end biomarker discovery-to-validation pipeline.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Thermo_Fisher_Scientific_Accelerating_Biomarker_Discovery_and_Validation_From_Discovery_to_Clinical_Utility_9558364cf2.jpg" alt="Thermo Fisher Scientific: Accelerating Biomarker Discovery and Validation: From Discovery to Clinical Utility" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Thermo_Fisher_Scientific_Accelerating_Biomarker_Discovery_and_Validation_From_Discovery_to_Clinical_Utility_9558364cf2.jpg 245w," sizes="100vw" width="1024" height="512">The session highlighted how emerging mass spectrometry technologies, automation, and informatics are reshaping biomarker research—reducing complexity, improving reproducibility, and accelerating the path to clinical utility.<h3>The three tiers of biomarker assays</h3>The workshop opened with a review of the widely accepted three-tier framework that guides biomarker development from early discovery through clinical validation:<h4>Tier 3 – discovery</h4>Exploratory, untargeted workflows such as data-dependent acquisition (DDA) and data-independent acquisition (DIA). These approaches prioritize breadth, enabling the identification of large-magnitude biological changes across hundreds to thousands of analytes, typically with low-to-moderate precision and without internal standards.<h4>Tier 2 – verification</h4>Research-grade targeted assays, including parallel reaction monitoring (PRM) and multiple reaction monitoring (MRM). These methods focus on tens to hundreds of analytes, delivering improved precision and repeatability to confirm trends observed during discovery.<h4>Tier 1 – validation</h4>Clinically validated assays designed to meet rigorous quality and regulatory standards. These workflows incorporate internal standards and strict quality controls to ensure quantitative reproducibility suitable for clinical and translational use.Each tier represents a critical step toward ensuring that biomarker candidates can ultimately deliver reliable patient benefit.<h3>The central challenge: from sample to signal</h3>Reliable biomarker development depends on consistency across the entire analytical workflow—from biological sample preparation to mass spectrometry data acquisition and downstream analysis. Every step introduces potential sources of variability, and minimizing this analytical noise while preserving biological signal is essential.Automation emerged as a central theme of the workshop. Beyond improving throughput, automation fundamentally enhances reproducibility. Robotic sample preparation reduces variability associated with digestion, pipetting, and handling—enabling consistent performance across hundreds or thousands of samples, a scale that is difficult to achieve manually.<h3>Technological innovation powering a paradigm shift</h3>Recent advances in mass spectrometry are enabling researchers to bridge the gap between discovery and validation more efficiently than ever before. The workshop highlighted several Thermo Fisher Scientific platforms driving this shift:<ul><li>Thermo Scientific Orbitrap Astral mass spectrometer Optimized for discovery workflows, the Astral system delivers rapid acquisition and deep proteome coverage while maintaining high precision across large cohorts.</li><li>Thermo Scientific Stellar platform Designed for high-throughput targeted quantification, the Stellar platform supports scalable PRM workflows. Features such as PRM Conductor enable adaptive retention time tracking, which is essential for robust performance in large studies.</li><li>Thermo Scientific OptaSpray Ion Source (under evaluation) A hands-free ionization source designed to deliver consistent spray performance with simplified maintenance, supporting reproducibility across thousands of injections.</li></ul>Together, these technologies create a smoother continuum across assay tiers, shortening timelines and reducing barriers to clinical translation.<h3>Case study: Inflammatory bowel disease (IBD) cohort</h3>A key highlight of the presentation was a large-scale biomarker study in inflammatory bowel disease (IBD). The team conducted a 500-sample discovery analysis, followed by validation in a 1,000-sample cohort. Discovery was performed using the Orbitrap Astral system, while targeted validation employed the Stellar platform.This integrated approach successfully confirmed established biomarkers such as C-reactive protein (CRP) while also identifying novel protein candidates with strong translational potential. Importantly, these markers demonstrated consistency across discovery and validation data sets—underscoring the power of advanced instrumentation combined with robust workflows and informatics.<h3>From high quantity to high quality</h3>Historically, biomarker discovery has involved a tradeoff between throughput and data quality. The workshop demonstrated that this compromise is no longer necessary. By integrating automated sample preparation, optimized informatics, and next-generation mass spectrometry, researchers can now generate high-quality, high-throughput data that is both scalable and reproducible.This shift enables faster discovery while increasing confidence that candidate biomarkers are ready for downstream validation and clinical follow-up.<h3>The future of biomarker translation</h3>The workshop concluded on an optimistic note. Innovations in proteomics are fundamentally transforming biomarker development—shortening timelines, reducing costs, and accelerating the transition from discovery to clinical application.By integrating platforms such as Orbitrap Astral, Stellar, and OptaSpray, Thermo Fisher Scientific is helping advance a new era of translational biomarker science—where precision, scalability, and reliability work together to deliver meaningful clinical impact.Watch the full workshop recording to <a target="_blank" rel="noopener noreferrer" href="https://www.youtube.com/watch?v=ziyffQzZTwk">explore the data, workflows, and results behind this end-to-end approach to biomarker discovery and validation.</a><h3>Intended use disclaimer</h3>General Laboratory Equipment – Not For Diagnostic Procedures. Thermo Scientific general laboratory equipment, consumables, and software are intended for research, academic, and industrial use only. These products are not designed, validated, or approved for in vitro diagnostic or clinical use. Use of these products for diagnostic purposes may result in inaccurate results and potential health and safety risks.<h3>Resources</h3>Workshop &amp; educational content<ul><li>MSACL 2025 workshop recording: <a target="_blank" rel="noopener noreferrer" href="https://www.youtube.com/watch?v=ziyffQzZTwk">Accelerating Biomarker Discovery and Validation</a></li><li>Other MSACL workshop recordings coming soon</li></ul>Thermo Fisher Scientific Product Pages<ul><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/2207">Thermo Scientific TSQ Certis Mass Spectrometer</a></li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/836">Thermo Scientific Orbitrap Astral Mass Spectrometer</a></li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/1149">Thermo Scientific Stellar Mass Spectrometer</a></li><li><a target="_blank" rel="noopener noreferrer" href="https://www.thermofisher.com/order/catalog/product/B51004132">Thermo Scientific OptaSpray Ion Source</a></li><li><a target="_blank" rel="noopener noreferrer" href="https://www.thermofisher.com/content/lifetech/global/en/home/industrial/mass-spectrometry/mass-spectrometer-price-affordability-programs.html">Mass spectrometer affordability programs</a> (Refurbished MS, trade-in, financing/ leasing)</li></ul>Peer-Reviewed Literature<ul><li>Baker ES et al. <a target="_blank" rel="noopener noreferrer" href="https://europepmc.org/article/MED/22943415">Mass spectrometry for translational proteomics: progress and clinical implications.</a> Genome Medicine (2012).</li><li>Fu Q et al. <a target="_blank" rel="noopener noreferrer" href="https://academic.oup.com/clinchem/article/62/1/198/5611803">An Empirical Approach to Signature Peptide Choice for Selected Reaction Monitoring.</a> Clinical Chemistry (2016).</li><li>Fu Q et al. <a target="_blank" rel="noopener noreferrer" href="https://doi.org/10.1002/mas.21750">Automated proteomic sample preparation: The key component for high throughput and quantitative mass spectrometry analysis.</a> Mass Spectrometry Reviews (2023).</li><li>Fu Q et al. <a target="_blank" rel="noopener noreferrer" href="https://doi.org/10.1021/acs.jproteome.7b00623">Highly Reproducible Automated Proteomics Sample Preparation Workflow for Quantitative Mass Spectrometry.</a> Journal of Proteome Research (2018).</li><li>Fu Q et al. <a target="_blank" rel="noopener noreferrer" href="https://doi.org/10.1002/anie.202409446">A Proteomics Pipeline for Generating Clinical Grade Biomarker Candidates from DIA-MS Discovery.</a> Angewandte Chemie International Edition (2024).</li><li>Fu Q et al. <a target="_blank" rel="noopener noreferrer" href="https://doi.org/10.1002/anie.202507610">Development and Clinical Evaluation of a Multiplexed Health Surveillance Panel Using Ultra High-Throughput PRM-MS in an Inflammatory Bowel Disease Cohort.</a> Angewandte Chemie International Edition (2025).</li></ul><blockquote>Visit us on&nbsp;<a target="_blank" rel="noopener noreferrer" href="https://www.linkedin.com/showcase/72003132/admin/dashboard/">LinkedIn:</a>&nbsp;#Omics #BiomarkerDiscovery #MassSpectrometry #ClinicalResearch</blockquote>

Accelerating Biomarker Discovery and Validation: From Discovery to Clinical Utility

Choosing the correct membrane for a syringe filter is an important step in achieving dependable and reproducible analytical results. Whether you work with nylon, PTFE, hydrophilic PTFE, or cellulose acetate filters, the membrane material directly influences filtration efficiency, sample integrity, and overall method performance. In this article, we explore why membrane selection matters, review the characteristics of common membrane materials, and provide practical guidance for choosing the best option for your application.<h4>Why Are Syringe Filters Important?</h4>Syringe filters are routinely used to remove particulate matter from samples prior to analysis. Unfiltered samples can introduce contaminants into chromatographic systems, leading to clogged columns, increased system backpressure, reduced instrument lifetime, and compromised analytical performance.Selecting an appropriate membrane is therefore essential for developing a robust and reliable HPLC workflow. An ideal membrane effectively removes particles while preserving the original composition of the sample. Since the membrane comes into direct contact with both the analyte and the sample solvent, compatibility must always be carefully considered.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_syringe_filters_f3eaa1381e.webp" alt="KNAUER: Syringe filters" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_syringe_filters_f3eaa1381e.webp 156w," sizes="100vw" width="720" height="720">Let’s examine the key factors involved in choosing the most suitable membrane.<h4>Step 1: Consider the Nature of Your Sample</h4>The first and most important factor is the chemical composition of the sample and the solvents involved. Different membrane materials offer different chemical resistance and sample interaction characteristics.<h5>Nylon Membranes</h5>Nylon is one of the most commonly used membrane materials in HPLC laboratories because of its broad compatibility with aqueous solutions and many organic solvents.Recommended applications:<ul><li>Routine filtration of HPLC samples containing aqueous solvents, organic solvents, or mixed mobile phases.</li><li>Removal of suspended particles prior to chromatographic injection.</li><li>General-purpose laboratory filtration where versatility is required.</li></ul>Avoid using Nylon when:<ul><li>Working with strongly acidic solutions or samples with pH values below 3.</li><li>Filtering protein-containing samples, since proteins can adsorb to the membrane surface and reduce recovery.</li></ul><h5>Cellulose Acetate (CA) Membranes</h5>Cellulose acetate membranes exhibit very low protein binding and are widely used for biological and biochemical applications.Recommended applications:<ul><li>Filtration of biological fluids such as serum, plasma, and cell culture media.</li><li>Applications where protein recovery must be maximized.</li><li>Aqueous laboratory procedures involving enzymes or other sensitive biomolecules.</li></ul>Avoid using CA when:<ul><li>Filtering samples containing organic solvents that may damage the membrane.</li><li>Working under highly acidic or highly alkaline conditions that could degrade the material.</li></ul><h5>Hydrophilic PTFE (hPTFE) Membranes</h5>Hydrophilic PTFE combines the exceptional chemical resistance of PTFE with the ability to process aqueous samples without pre-wetting.Recommended applications:<ul><li>Filtration of both aqueous and organic solutions.</li><li>HPLC sample preparation involving mixed solvent systems.</li><li>Applications requiring compatibility across a broad pH range.</li></ul>Avoid using hPTFE when:<ul><li>Processing highly viscous samples that may rapidly clog the membrane.</li><li>Performing PFAS analysis, where fluorinated materials may introduce unwanted contamination.</li></ul><h5>PTFE Membranes</h5>PTFE membranes provide excellent resistance to aggressive chemicals and are especially suitable for demanding solvent environments.Recommended applications:<ul><li>Samples containing strong acids, strong bases, or aggressive organic solvents.</li><li>Environmental, industrial, and chemical analyses involving non-polar solvents such as hexane, toluene, or acetone.</li><li>Filtration of predominantly organic solvent-based samples.</li></ul>Avoid using PTFE when:<ul><li>Filtering aqueous solutions without first wetting the membrane or using a hydrophilic PTFE alternative.</li><li>Working with protein-rich or highly hydrophilic samples where adsorption or poor wetting may occur.</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Fig_1_4_Nylon_top_left_CA_top_right_h_PTFE_bottom_left_and_PTFE_bottom_right_86a6481d0b.jpg" alt="KNAUER: Fig. 1–4 Nylon (top left), CA (top, right), hPTFE (bottom, left), and PTFE (bottom, right)" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Fig_1_4_Nylon_top_left_CA_top_right_h_PTFE_bottom_left_and_PTFE_bottom_right_86a6481d0b.jpg 157w," sizes="100vw" width="1111" height="1107"><h4>Step 2: Select an Appropriate Pore Size</h4>The membrane pore size determines the level of particulate removal and should be selected according to the requirements of the analytical method.Common pore sizes include:<ul><li>0.2 µm – Suitable for removing very fine particles and for sterile filtration. Frequently used in UHPLC and LC-MS workflows.</li><li>0.45 µm – The standard choice for most routine HPLC applications.</li><li>1.0 µm and larger – Often used for coarse filtration or as a pre-filtration step for heavily contaminated samples.</li></ul>Choosing the correct pore size helps protect instrumentation while minimizing unnecessary sample loss.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Fig_1_2_0_22_m_left_and_0_45_m_right_Nylon_Syringe_Filter_48ffc3d777.jpg" alt="KNAUER: Fig. 1–2 0.22 µm (left), and 0.45 µm (right) Nylon Syringe Filter" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Fig_1_2_0_22_m_left_and_0_45_m_right_Nylon_Syringe_Filter_48ffc3d777.jpg 245w," sizes="100vw" width="1177" height="573"><h4>Step 3: Verify Chemical Compatibility</h4>Before selecting a membrane, confirm that it is compatible with both the sample matrix and the solvents present. Incompatible materials may swell, degrade, release extractables, or alter the composition of the sample.Consulting a solvent compatibility chart is highly recommended whenever unfamiliar solvents or mixtures are involved.<h4>Step 4: Match the Membrane to the Application</h4>Different analytical applications often benefit from specific membrane types.<h5>HPLC Analysis</h5><ul><li>Nylon and PTFE membranes are among the most frequently used options due to their broad chemical compatibility and excellent filtration performance.</li></ul><h5>Protein and Biomolecule Analysis</h5><ul><li>CA, PVDF, and PES membranes are generally preferred because they exhibit low protein binding and help preserve sample recovery.</li></ul><h5>Microbiological Testing</h5><ul><li>Mixed cellulose ester (MCE) membranes are commonly employed for microbial monitoring and microbiological quality control procedures.</li></ul>Selecting a membrane tailored to the analytical objective can significantly improve data quality and method reliability.<h4>Step 5: Evaluate Product Quality and Certification</h4>Not all syringe filters are manufactured to the same standards. For critical applications, select products that comply with recognized quality systems and certifications such as ISO standards or CE requirements.This becomes particularly important in regulated industries, where traceability, consistency, and documented performance are essential.<h4>Practical Recommendations for Using Syringe Filters</h4>Following good filtration practices can further improve analytical performance.<ul><li>Pre-Wet Hydrophobic Membranes: Hydrophobic materials such as PTFE often require pre-wetting with a compatible organic solvent before filtering aqueous samples.</li><li>Avoid Excessive Pressure: Applying excessive force may rupture the membrane or cause leakage. Luer-lock syringes are recommended to provide secure connections and controlled pressure.</li><li>Use Filters Only Once: Syringe filters are intended for single-use operation. Reusing filters increases the risk of carryover and cross-contamination.</li><li>Dispose of Filters Properly: Used syringe filters should be discarded according to laboratory safety procedures and local waste disposal regulations.</li></ul><h4>Final Thoughts</h4>Selecting the right syringe filter membrane is a key factor in obtaining accurate, reproducible, and reliable analytical results. By considering sample composition, solvent compatibility, pore size, and application requirements, laboratories can choose filtration solutions that protect instruments, preserve sample integrity, and improve overall analytical performance.A carefully selected membrane may seem like a small detail, but it can have a substantial impact on the quality and robustness of your entire analytical workflow.<blockquote>If you want to optimize your HPLC workflow, check out our brand-new <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/2380">SEPAPURE Syringe Filter</a>.</blockquote>

How to Choose the Right Membrane for Your Syringe Filter

News from LabRulezLCMS Library - Week 26, 2026

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Based in Berlin, KNAUER is a medium-sized, owner-managed company that has been serving the sciences since 1962. We develop and manufacture scientific instruments of superior quality for liquid chromatography, including: Analytical HPLC/UHPLC, Preparative HPLC, Fast protein liquid chromatography (FPLC), Multi-column chromatography/Simulated moving bed (SMB) chromatography. High pressure dosing, in-line detection systems, and osmometry are additional business areas.

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Phenomenex Biozen dSEC-1 LC columns

Phenomenex Biozen dSEC-1 is a high-resolution SEC column for peptide therapeutics, delivering fast, reproducible aggregate analysis with improved peak shape and compatibility with SEC-MS and SEC-MALS.

<h4>High-Resolution Aggregate Analysis for Peptide Therapeutics</h4>Biozen dSEC-1 columns are engineered to meet the growing demand for aggregate analysis in peptide therapeutics and mid-sized biologics. Packed with 90 Å small pore silica and featuring inert diol-based surface chemistry, dSEC-1 delivers enhanced resolution for low and high molecular weight peptide aggregates. Its robust design ensures reproducibility and compatibility with advanced workflows like SEC-MS and SEC-MALS.<h5>Robust Performance for Peptide Aggregate Analysis</h5><ul><li>High resolution for low/high MW peptide aggregates (1–50 kDa)</li><li>Reproducible, and fast analysis with extended column lifetime</li><li>Improved peak asymmetry by up to 40%</li><li>Recommended Use: Analysis of peptides, protein fragments, and small biologics with reduced analysis times and improved column lifetimes.</li></ul><h4>Aggregate and Monomer Separation in Liraglutide Formulations</h4><ul><li>Baseline resolution of monomer and two aggregates achieved in under 10 minutes</li><li>Exceptional reproducibility with retention time RSD ≤ 0.08% and peak area RSD ≤ 0.01%</li><li>Clear detection at low levels with S/N ratios of 13, 75, and 10,917 for aggregates and monomer</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_separation_in_liraglutide_formulations_3_b0d97cd01f.jpg" alt="Phenomenex: Aggregate and Monomer Separation in Liraglutide Formulations" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_separation_in_liraglutide_formulations_3_b0d97cd01f.jpg 245w," sizes="100vw" width="938" height="307"><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_separation_in_liraglutide_formulations_2_035bfea3bc.jpg" alt="Phenomenex: Aggregate and Monomer Separation in Liraglutide Formulations" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_separation_in_liraglutide_formulations_2_035bfea3bc.jpg 245w," sizes="100vw" width="1700" height="1050"><h3>Biozen SEC Proprietary Silica Particle Technology</h3>The Biozen dSEC columns are packed with low pore volume silica coupled with a proprietary hydrophilic diol-type bonded surface chemistry that prevents the silica surface from interacting with protein samples.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Biozen_SEC_Proprietary_Silica_Particle_Technology_502218b910.jpg" alt="Phenomenex: Biozen SEC Proprietary Silica Particle Technology" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Biozen_SEC_Proprietary_Silica_Particle_Technology_502218b910.jpg 245w," sizes="100vw" width="1448" height="469"><h4>Improved Column Lifetime and Performance Stability</h4>Phenomenex’s optimized SEC column loading technology has significantly improved the overall packing density and silica distribution of the columns leading to improved chromatographic lifetime and stability.<h4>New Standard for Platform SEC Methods</h4>Whether IgG2 or IgG4 isotypes, bispecifics, or Fc-Fusions, dSEC-2 provides excellent separation and sample recovery for many different classes of antibodies and related recombinant proteins.<h3>Phenomenex Biozen Biologics LC Columns</h3>With a new titanium BioTi™ biocompatible hardware to minimize priming, four particle platforms for optimal versatility and nine particle chemistries to maximize selectivity and sensitivity, Biozen UHPLC/HPLC columns for protein analysis are seamlessly designed to bring peace of mind to your analysis of biologics through:<ul><li>Charge Variant Analysis</li><li>Aggregate Analysis</li><li>Peptide Mapping</li><li>Intact Mass Analysis</li><li>Intact and Subunit Analysis</li><li>Glycan Analysis</li><li>Peptide Quantitation</li><li>Drug Antibody Ratio (DAR)</li><li>Oligonucleotide Characterization</li></ul><h3>Biocompatible Flow Path with BioTi™ Hardware</h3>Keep your mind at ease knowing that we’ve minimized the need for priming with a new titanium infused biocompatible hardware and frit that doesn’t interfere with protein or peptide integrity!<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Bio_Ti_Hardware_991fb53395.jpg" alt="Phenomenex: BioTi Hardware" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Bio_Ti_Hardware_991fb53395.jpg 245w," sizes="100vw" width="1378" height="426"><h3>4 Advanced Particle Platforms</h3>All four of the Biozen particle platforms were individually designed and built by Phenomenex to take advantage of integral levels of performance, ruggedness, and reproducibility for protein characterization applications. Individually, each platform differs in the proprietary processing techniques used to control particle size and morphology.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Advanced_Particle_Platforms_a0959aca03.jpg" alt="Phenomenex: Advanced Particle Platforms" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Advanced_Particle_Platforms_a0959aca03.jpg 245w," sizes="100vw" width="1439" height="868">

Phenomenex Rezex RHM-Monosaccharide H+ (8%) IEX HPLC Columns

Rezex RHM-Monosaccharide H⁺ (8%) is a versatile ion-exclusion HPLC column for monosaccharides and related compounds, typically operated with water as the mobile phase and compliant with USP L17.

<h4>Key Features of the Rezex RHM-Monosaccharide H+ (8%) Ion Exclusion HPLC Column:</h4><ul><li>8% cross-linked hydrogen</li><li>For use with monosaccharides in combination with organic acids, fatty acids, alcohols, ketones, neutral compounds, or inorganic salts</li><li>Versatile column, generally run with a mobile phase of deionized water</li><li>USP L17</li></ul><h4>Specifications and Operating Recommendations</h4><ul><li>Part No.: 00H-0132-K0</li><li>Ionic Form: Hydrogen</li><li>Standard Dimensions: 300 x 7.8 mm</li><li>Matrix: Sulfonated Styrene Divinyl Benzene</li><li>Cross Linking: 8 %</li><li>Particle Size (μm): 8</li><li>Min. Efficiency (p/m) based on last peak: 35,000</li><li>Typical Pressure (psi @ Testing Flow Rate): 275</li><li>Max. Pressure (psi @ Max Flow Rate): 1,000</li><li>Max. Flow Rate (mL/min): 1.0</li><li>Max. Temperature (°C): 85</li><li>Typical Mobile Phase: Water</li><li>pH Range: 1-8</li><li>Guard Column Part: 03B-0132-K0</li></ul><h4>Cleaning, Regeneration and Storage&nbsp;&nbsp;&nbsp;&nbsp; </h4><ul><li>Organic Modifiers (Max): 5 % Methanol, IPA, EtOH</li><li>Inorganic Modifiers: 5 % HNO3, H3PO4</li><li>Avoid: Acids, Bases, Salts or Metal Ions, &gt; 30 % Acetonitrile</li><li>Cleaning Solvent: 100 % Water</li><li>Flow Rate(mL/min): 0.4</li><li>Temperature (°C): 85</li><li>Duration (hrs): 12</li><li>Regeneration Solvent: 0.025 M H2SO4</li><li>Flow Rate (mL/min): 0.2</li><li>Duration (hrs): 4-16</li><li>Ship/Storage Solvent: Water</li></ul><h4>Cross Reference Guide</h4><ul><li>Phase: RHM-Monosaccharide (L17 USP packing)*&nbsp;&nbsp;&nbsp;&nbsp;</li><li>Description: 8 % cross-linked HYDROGEN</li><li>Applications: Monosaccharides in combination with organic acids, fatty acids, alcohols, ketones, neutral compounds, or inorganic salts</li><li>Bio-Rad® Aminex®: HPX-87H (125-0140)</li><li>Supelco® Supelcogel™: Supelcogel (C-610H &amp; H)&nbsp;&nbsp;&nbsp;</li><li>Waters® SugarPak™: N/A</li><li>Transgenomic® CARBOSep™: ICSep (ION-300)</li><li>Sepax® Carbomi®: Carbomix H</li></ul>

Phenomenex Rezex RNM-Carbohydrate Na+ IEX HPLC Columns

Rezex RNM-Carbohydrate Na⁺ (8%) is an ion-exclusion HPLC column designed for mono-, di-, and trisaccharide analysis in high-sodium matrices, offering easy regeneration and USP L58 compliance.

<h4>Key Features of the Rezex RNM-Carbohydrate Na+ Ion Exclusion HPLC Column:</h4><ul><li>8% cross-linked sodium</li><li>For the analysis of matrices containing high concentrations of inorganic sodium (e.g. molasses)</li><li>Analysis of mono-, di-, and tri- saccharides</li><li>Easy to regenerate the original ionic strength</li><li>USP L58</li></ul><h4>Specifications and Operating Recommendations</h4><ul><li>Part No.: 00H-0136-K0</li><li>Ionic Form: Sodium</li><li>Standard Dimensions: 300 x 7.8 mm</li><li>Matrix: Sulfonated Styrene Divinyl Benzene</li><li>Cross Linking: 8 %</li><li>Particle Size (μm): 8</li><li>Min. Efficiency (p/m) based on last peak: 30,000</li><li>Typical Pressure (psi @ Testing Flow Rate): 170</li><li>Max. Pressure (psi @ Max Flow Rate): 1,000</li><li>Max. Flow Rate (mL/min): 1.0</li><li>Max. Temperature (°C): 85</li><li>Typical Mobile Phase: Water</li><li>pH Range: Neutral</li><li>Guard Column Part: 03B-0136-K0</li></ul><h4>Cleaning, Regeneration and Storage&nbsp;&nbsp;&nbsp;&nbsp; </h4><ul><li>Organic Modifiers (Max): 5 % Methanol, IPA, EtOH</li><li>Inorganic Modifiers: 5 % Sodium Salts</li><li>Avoid: Acids, Bases, Non-Sodium Salts or Metal Ions, &gt; 30 % Acetonitrile</li><li>Cleaning Solvent: 100 % Water</li><li>Flow Rate(mL/min): 0.4</li><li>Temperature (°C): 85</li><li>Duration (hrs): 12</li><li>Regeneration Solvent: 0.1 M NaNO3</li><li>Flow Rate (mL/min): 0.2</li><li>Duration (hrs): 4-16</li><li>Ship/Storage Solvent: Water</li></ul><h4>Cross Reference Guide</h4><ul><li>Phase: RHM-Carbohydrate (USP L58 packing)</li><li>Description: 8 % cross-linked SODIUM</li><li>Bio-Rad® Aminex®: HPX-87N (125-0143)</li><li>Supelco® Supelcogel™: N/A</li><li>Waters® SugarPak™: N/A</li><li>Transgenomic® CARBOSep™: N/A</li><li>Sepax® Carbomi®: Carbomix Na</li></ul>

Phenomenex Rezex RPM-Monosaccharide Pb+2 IEX HPLC Columns

Phenomenex Rezex RPM-Monosaccharide Pb²⁺ (8%) IEX HPLC column is designed for high-resolution analysis of monosaccharides and sugar alcohols, offering robust separations using water as the mobile phase and USP L34 compliance.

<h4>Key Features of the Phenomenex Rezex RPM-Monosaccharide Pb+2 IEX HPLC Columns:</h4><ul><li>8% cross-linked lead</li><li>Ideal for monosaccharide and sugar alcohol analysis</li><li>For separations of cellobiose, glucose, xylose, arabinose, and mannose and other cellulose products</li><li>100 x 7.8 mm dimensions available for sugar alcohol analysis according to the USP procedure &nbsp;</li></ul><h4>Specifications and Operating Recommendations</h4><ul><li>Part No.: 00H-0135-K0</li><li>Ionic Form: Lead</li><li>Standard Dimensions: 300 x 7.8 mm</li><li>Matrix: Sulfonated Styrene Divinyl Benzene</li><li>Cross Linking: 8 %</li><li>Particle Size (μm): 8</li><li>Min. Efficiency (p/m) based on last peak: 35,000</li><li>Typical Pressure (psi @ Testing Flow Rate): 190</li><li>Max. Pressure (psi @ Max Flow Rate): 1,000</li><li>Max. Flow Rate (mL/min): 1.0</li><li>Max. Temperature (°C): 85</li><li>Typical Mobile Phase: Water</li><li>pH Range: Neutral</li><li>Guard Column Part: 03B-0135-K0</li></ul><h4>Cleaning, Regeneration and Storage&nbsp;&nbsp;&nbsp;&nbsp; </h4><ul><li>Organic Modifiers (Max): 5 % Lead Nitrile</li><li>Inorganic Modifiers: 5% Methanol, IPA, EtOH</li><li>Avoid: Acids, Bases, Non-Lead Salts or Metal Ions, &gt; 30 % Acetonitrile</li><li>Cleaning Solvent: 100 % Water</li><li>Flow Rate(mL/min): 0.4</li><li>Temperature (°C): 85</li><li>Duration (hrs): 12</li><li>Regeneration Solvent: 0.1 M Pb(NO3)2</li><li>Flow Rate (mL/min): 0.2</li><li>Duration (hrs): 4-16</li><li>Ship/Storage Solvent: Water</li></ul><h4>Cross Reference Guide</h4><ul><li>Phase: RPM-Monosaccharide (USP L34 packing)</li><li>Description: 8 % cross-linked LEAD</li><li>Bio-Rad® Aminex®: HPX-87P (125-0098)</li><li>Supelco® Supelcogel™: Supelcogel Pb</li><li>Waters® SugarPak™: N/A</li><li>Transgenomic® CARBOSep™: CARBOSep COREGEL-87P</li><li>Sepax® Carbomi®: Carbomix Pb</li></ul>

Phenomenex Rezex ROA-Organic Acid H+ (8%) IEX HPLC Columns

Rezex ROA-Organic Acid H⁺ (8%) is an ion-exclusion HPLC column for simultaneous analysis of organic acids, sugars, and alcohols, ideal for bioethanol fermentation monitoring in a single run.

<h4>Key Features of the Rezex ROA-Organic Acid H+ (8%) Ion Exclusion HPLC Column:</h4><ul><li>8% cross-linked hydrogen</li><li>For use with organic acids in combination with carbohydrates, alcohols, fatty acids, neutral compounds; amino sugars</li><li>Uniquely suited to monitor starches, sugars, organic acids, and ethanol in one run for bioethanol fermentation analysis</li><li>Applications<ul><li>Organic acids in combination with carbohydrates, alcohols, fatty acids, or neutral compounds</li><li>Ethanol, acetic acid, glycerol, and standard alcohol mixtures</li><li>Amino sugars</li></ul></li><li>Achieve excellent base line separation between Dp3 and Dp4+</li></ul><h4>Specifications and Operating Recommendations</h4><ul><li>Part No.: 00H-0138-K0</li><li>Ionic Form: Hydrogen</li><li>Standard Dimensions: 300 x 7.8 mm</li><li>Matrix: Sulfonated Styrene Divinyl Benzene</li><li>Cross Linking: 8 %</li><li>Particle Size (μm): 8</li><li>Min. Efficiency (p/m) based on last peak: 50,000</li><li>Typical Pressure (psi @ Testing Flow Rate): 580</li><li>Max. Pressure (psi @ Max Flow Rate): 1,000</li><li>Max. Flow Rate (mL/min): 1.0</li><li>Max. Temperature (°C): 85</li><li>Typical Mobile Phase: 0.005 N H2SO4</li><li>pH Range: 1-8</li><li>Guard Column Part: 03B-0138-K0</li></ul><h4>Cleaning, Regeneration and Storage&nbsp;&nbsp;&nbsp;&nbsp; </h4><ul><li>Organic Modifiers (Max): 5 % Methanol, IPA, EtOH</li><li>Inorganic Modifiers: 5 % HNO3, H3PO4</li><li>Avoid: Acids, Bases, Salts or Metal Ions, pH &gt; 3, &gt; 30 % Acetonitrile</li><li>Cleaning Solvent: 100 % Water</li><li>Flow Rate(mL/min): 0.4</li><li>Temperature (°C): 85</li><li>Duration (hrs): 12</li><li>Regeneration Solvent: 0.025 M H2SO4</li><li>Flow Rate (mL/min): 0.2</li><li>Duration (hrs): 4-16</li><li>Ship/Storage Solvent: 0.005 M H2SO4</li></ul><h4>Cross Reference Guide</h4><ul><li>Bio-Rad® Aminex®: HPX-87H (125-0140)</li><li>Supelco® Supelcogel™: Supelcogel (C-610H &amp; H)&nbsp;&nbsp;&nbsp;</li><li>Waters® SugarPak™: N/A</li><li>Transgenomic® CARBOSep™: N/A</li><li>Sepax® Carbomi®: N/A</li></ul>

Phenomenex Rezex RFQ-Fast Acid H+ (8%) IEX HPLC Columns

Rezex RFQ-Fast Acid H⁺ (8%) is an ion-exclusion HPLC column designed for rapid food quality screening, delivering separation of ethanol, organic acids, and alcohols in under 5 minutes.

<h4>Key Features of the Rezex RFQ-Fast Acid H+ (8%) Ion Exclusion HPLC Column:</h4><ul><li>8% cross-linked hydrogen</li><li>Rapid screening of food quality; ethanol, acetic acid, glycerol, and standard alcohol mixtures</li><li>Analytes are routinely chromatographed under 5 minutes!</li><li>Applications<ul><li>Rapid screening of fruit quality</li><li>Ethanol, acetic acid, glycerol and standard alcohol mixtures</li></ul></li></ul><h4>Specifications and Operating Recommendations</h4><ul><li>Part No.: 00H-0223-K0</li><li>Ionic Form: Hydrogen</li><li>Standard Dimensions: 100 x 7.8 mm</li><li>Matrix: Sulfonated Styrene Divinyl Benzene</li><li>Cross Linking: 8 %</li><li>Particle Size (μm): 8</li><li>Min. Efficiency (p/m) based on last peak: 30,000</li><li>Typical Pressure (psi @ Testing Flow Rate): 365</li><li>Max. Pressure (psi @ Max Flow Rate): 1,000</li><li>Max. Flow Rate (mL/min): 1.0</li><li>Max. Temperature (°C): 85</li><li>Typical Mobile Phase: 0.005 N H2SO4</li><li>pH Range: 1-8</li><li>Guard Column Part: 03B-0223-K0</li></ul><h4>Cleaning, Regeneration and Storage&nbsp;&nbsp;&nbsp;&nbsp; </h4><ul><li>Organic Modifiers (Max): 5 % Methanol, IPA, EtOH</li><li>Inorganic Modifiers: 5 % HNO3, H3PO4</li><li>Avoid: Acids, Bases, Salts or Metal Ions, pH &gt; 3, &gt; 30 % Acetonitrile</li><li>Cleaning Solvent: 100 % Water</li><li>Flow Rate(mL/min): 0.4</li><li>Temperature (°C): 85</li><li>Duration (hrs): 12</li><li>Regeneration Solvent: 0.025 M H2SO4</li><li>Flow Rate (mL/min): 0.2</li><li>Duration (hrs): 4-16</li><li>Ship/Storage Solvent: 0.005 M H2SO4</li></ul><h4>Cross Reference Guide</h4><ul><li>Bio-Rad® Aminex®: Fast Acid 125-0100&nbsp;&nbsp;&nbsp;&nbsp;</li><li>Supelco® Supelcogel™: N/A</li><li>Waters® SugarPak™: N/A</li><li>Transgenomic® CARBOSep™: N/A</li><li>Sepax® Carbomi®: N/A</li></ul>

Phenomenex Rezex RNO-Oligosaccharide Na+ (4%) IEX HPLC Columns

Rezex RNO-Oligosaccharide Na⁺ (4%) is an ion-exclusion HPLC column designed for high-resolution separation of oligosaccharides, using water as the mobile phase and optimized for gentle, low-pressure operation.

<h4>Key Features of the Rezex RNO-Oligosaccharide Na+ (4%) Ion Exclusion HPLC Column:</h4><ul><li>4% cross-linked sodium</li><li>High resolution of oligosaccharides</li><li>Particle Size: 12</li></ul><h4>Specifications and Operating Recommendations</h4><ul><li>Part No.: 00P-0137-N0</li><li>Ionic Form: Sodium</li><li>Standard Dimensions: 200 x 10 mm</li><li>Matrix: Sulfonated Styrene Divinyl Benzene</li><li>Cross Linking: 4 %</li><li>Particle Size (μm): 12</li><li>Min. Efficiency (p/m) based on last peak: N/A</li><li>Typical Pressure (psi @ Testing Flow Rate): 130</li><li>Max. Pressure (psi @ Max Flow Rate): 300</li><li>Max. Flow Rate (mL/min): 0.3</li><li>Max. Temperature (°C): 85</li><li>Typical Mobile Phase: Water</li><li>pH Range: Neutral</li><li>Guard Column Part: 03R-0137-N0</li></ul><h4>Cleaning, Regeneration and Storage&nbsp;&nbsp;&nbsp;&nbsp; </h4><ul><li>Organic Modifiers (Max): 5 % Methanol, IPA, EtOH</li><li>Inorganic Modifiers: 5 % Sodium Salts</li><li>Avoid: Acids, Bases, Non-Sodium Salts or Metal Ions, &gt; 30 % Acetonitrile</li><li>Cleaning Solvent: 100 % Water</li><li>Flow Rate(mL/min): 0.1</li><li>Temperature (°C): 85</li><li>Duration (hrs): 12</li><li>Regeneration Solvent: 0.1 M NaNO3</li><li>Flow Rate (mL/min): 0.2</li><li>Duration (hrs): 4-16</li><li>Ship/Storage Solvent: Water</li></ul><h4>Cross Reference Guide</h4><ul><li>Bio-Rad® Aminex®: N/A</li><li>Supelco® Supelcogel™: N/A</li><li>Waters® SugarPak™: N/A</li><li>Transgenomic® CARBOSep™: CARBOSep (COREGEL-87N)</li><li>Sepax® Carbomi®: N/A</li></ul>

Phenomenex Rezex RSO-Oligosaccharide Ag+ (4%) IEX HPLC Columns

Rezex RSO-Oligosaccharide Ag⁺ (4%) is an ion-exclusion HPLC column delivering high-resolution separation of oligosaccharides up to DP18, using silver-based selectivity and a water mobile phase.

<h4>Key Features of the Rezex RSO-Oligosaccharide Ag+ (4%) Ion Exclusion HPLC Column:</h4><ul><li>4% cross-linked silver</li><li>High resolution of oligosaccharides up to 18 degrees of polymerization (Dp)</li><li>Particle Size: 12</li></ul><h4>Specifications and Operating Recommendations</h4><ul><li>Part No.: 00P-0133-N0</li><li>Ionic Form: Silver</li><li>Standard Dimensions: 200 x 10 mm</li><li>Matrix: Sulfonated Styrene Divinyl Benzene</li><li>Cross Linking: 4 %</li><li>Particle Size (μm): 12</li><li>Min. Efficiency (p/m) based on last peak: N/A</li><li>Typical Pressure (psi @ Testing Flow Rate): 115</li><li>Max. Pressure (psi @ Max Flow Rate): 300</li><li>Max. Flow Rate (mL/min): 0.3</li><li>Max. Temperature (°C): 85</li><li>Typical Mobile Phase: Water</li><li>pH Range: Neutral</li><li>Guard Column Part: 03R-0133-N0</li></ul><h4>Cleaning, Regeneration and Storage&nbsp;&nbsp;&nbsp;&nbsp; </h4><ul><li>Organic Modifiers (Max): 5 % Methanol, IPA, EtOH</li><li>Inorganic Modifiers: 5 % Silver Nitrate</li><li>Avoid: Acids, Bases, Non-Silver Salts or Metal Ions, &gt; 30 % Acetonitrile</li><li>Cleaning Solvent: 100 % Water</li><li>Flow Rate(mL/min): 0.1</li><li>Temperature (°C): 85</li><li>Duration (hrs): 12</li><li>Regeneration Solvent: 0.1 M AgNO3</li><li>Flow Rate (mL/min): 0.1</li><li>Duration (hrs): 4-16</li><li>Ship/Storage Solvent: Water</li></ul><h4>Cross Reference Guide</h4><ul><li>Bio-Rad® Aminex®: HPX-42A (125-0097)</li><li>Supelco® Supelcogel™: Supelcogel (AG1 &amp; AG2)</li><li>Waters® SugarPak™: N/A</li><li>Transgenomic® CARBOSep™: N/A</li><li>Sepax® Carbomi®: N/A</li></ul>

Phenomenex Rezex RKP-Potassium K+ (8%) IEX HPLC Columns

Rezex RKP-Potassium K⁺ (8%) is an ion-exclusion HPLC column designed for the analysis of glyphosate, using potassium form chemistry and an 8% cross-linked resin for reliable separations.

<h4>Key Features of the Rezex RKP-Potassium K+ (8%) Ion Exclusion HPLC Column:</h4><ul><li>8% cross-linked potassium</li><li>Analysis of glyphosate</li><li>Particle Size: 8</li></ul><h4>Cross Reference Guide</h4><ul><li>Bio-Rad® Aminex®: HPX-87K (125-0142)</li><li>Supelco® Supelcogel™: Supelcogel K</li><li>Waters® SugarPak™: N/A</li><li>Transgenomic® CARBOSep™: CARBOSep (COREGEL-87K)</li><li>Sepax® Carbomi®: Carbomix K</li></ul>

Phenomenex Luna Omega HILIC HPLC Columns

Phenomenex Luna Omega HILIC combines a bonded diol phase with fully porous particles for superior retention and selectivity of polar analytes in HILIC applications.

Luna Omega HILIC columns combine thermally modified fully porous particles with a bonded diol stationary phase to provide enhanced retention and selectivity for polar analytes under HILIC conditions. Designed for small polar molecules, metabolites, nucleobases, pharmaceuticals, and other challenging compounds, these columns deliver excellent chromatographic performance and robustness.The diol stationary phase provides multiple interaction mechanisms that improve retention and separation of polar compounds while maintaining excellent peak shape and reproducibility. The thermally modified fully porous particles extend column lifetime and ensure reliable performance across demanding analytical workflows.<h3>Technical Specifications</h3><h4>Stationary Phase</h4><ul><li>Phase: Diol</li><li>USP Classification: L20</li></ul><h4>Particle Characteristics</h4><ul><li>Particle Sizes:<ul><li>1.6 µm</li><li>3 µm</li></ul></li><li>Pore Size: 100 Å</li><li>Surface Area: 260 m²/g</li><li>Carbon Load: 5 %</li></ul><h4>Chemical Properties</h4><ul><li>pH Range: 2.0–7.0</li><li>Maximum Pressure: 1034 bar (15,000 psi)</li></ul><h4>Available Dimensions</h4><ul><li>Lengths:<ul><li>50 mm</li><li>100 mm</li><li>150 mm</li><li>250 mm</li></ul></li><li>Internal Diameters:<ul><li>2.1 mm</li><li>3.0 mm</li><li>4.6 mm</li></ul></li></ul><h4>Typical Applications</h4><ul><li>HILIC separations</li><li>Nucleobases</li><li>Nucleotides</li><li>Metabolomics</li><li>Pharmaceutical analysis</li><li>Bioanalytical workflows</li><li>Food analysis</li><li>Environmental testing</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Luna_Omegs_HILIC_b02079eee2.jpg" alt="Phenomenex: Separation of Nucleobases with Luna Omega 3μm HILIC. 1. Thymine 2. Uracil 3. Adenine 4. Cytosine 5. Guanine" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Luna_Omegs_HILIC_b02079eee2.jpg 245w," sizes="100vw" width="1284" height="648"><h3>Phenomenex Luna Omega HPLC/UHPLC Columns</h3>The cutting edge thermally modified Luna Omega particle delivers high efficiency, ruggedness, reproducibility, and dependability for a wide range of chromatographic analyses. Luna Omega HPLC and UHPLC columns are built upon more then 20 years of applied knowledge, invention, and customer experience in the manufacture and packing of LC columns. The particle’s novel design and proprietary manufacturing process results in greater particle inertness, a stronger particle morphology, and more consistent porosity.<ul><li>Greater separation muscle and retention</li><li>Consistent porous structure and elimination of micropores</li><li>Extreme ruggedness and reproducibility</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Thermal_modified_pore_structure_of_Luna_Omega_Column_particles_37138bb135.jpg" alt="Phenomenex:Thermal modified pore structure of Luna Omega Column particles" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Thermal_modified_pore_structure_of_Luna_Omega_Column_particles_37138bb135.jpg 245w," sizes="100vw" width="1257" height="369"><h3>Explore Luna Omega Columns</h3><h5>Astounding Performance</h5>The undeniably high efficiency levels found in each Luna Omega UHPLC column provide you with the potential of huge gains in method performance. While traditional silica and hybrid fully porous particles claim high performance, when compared to Luna Omega 1.6 μm, they drastically fall short and prevent UHPLC scientists from reaching their UHPLC potential.<h5>Separation Muscle</h5>Our industry leading bonding technologies in conjunction with high efficiency levels ensure excellent stationary phase coverage and improved separation power. Now, with Luna Omega 1.6 μm, you can turn difficult separations into resolution achievements.<h5>Inert Foundation</h5>Luna Omega UHPLC columns contain a unique silica modified using a proprietary, post-synthetic thermal treatment process to provide extraordinary mechanical strength and significantly greater inertness than traditional fully porous and hybrid materials. This greatly minimizes secondary interactions that negatively affect peak shape, allowing for greater method accuracy.<h5>Consistent Results</h5>Batch-to-batch and column-to-column, Luna® Omega media and columns are designed to be consistent and incredibly accurate tools for your analysis. Each batch and column are quality tested to ensure dependability and reproducibility.

Products focused on LC columns from Phenomenex - page 1

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