Meeting EU Drinking Water Standards: The Critical Role of Sample Prep in Trace Contaminant Analysis

<h3><strong>Charged for Action: The Hidden Secrets of AEX Oligonucleotide Analysis</strong></h3><p><strong>Oligonucleotides—short, well-defined fragments of DNA or RNA—have become indispensable tools in modern life sciences. They underpin cutting-edge applications in molecular diagnostics, gene therapy, and pharmaceutical development. Before oligonucleotides can be confidently used in research or clinical settings, however, their quality must be rigorously assessed. Purity, sequence integrity, length distribution, and chemical modifications all play a decisive role in their performance.</strong></p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Oligos_Made_Easy_Part_2_AEX_2_45eee54fa0.jpg" alt="KNAUER: Oligos Made Easy - Part 2: AEX" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Oligos_Made_Easy_Part_2_AEX_2_45eee54fa0.jpg 245w," sizes="100vw" width="1534" height="711"></p><p>Among the analytical techniques available today, <strong>anion exchange chromatography (AEX)</strong> stands out as a robust and highly informative method for characterizing oligonucleotides. By exploiting their intrinsic negative charge, AEX provides detailed insight into product composition and impurity profiles that are difficult to obtain by other approaches.</p><blockquote><p><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/article/6808"><strong>Part 1 of the Oligos series: A Practical Guide to Oligonucleotide Production – From Concept to Final Product</strong></a></p></blockquote><h4><strong>How Scientists Read Oligonucleotides Using Charge</strong></h4><p>At the core of AEX lies a simple but powerful principle: oligonucleotides carry a negatively charged phosphate backbone. This charge increases in a predictable way with strand length and, to a lesser extent, sequence composition. Anion exchange chromatography uses this property to separate oligonucleotides based on differences in charge strength and interaction with a positively charged stationary phase.</p><p>As a result, AEX has become one of the most widely used analytical tools for evaluating oligonucleotide quality. It allows scientists to distinguish full-length products from truncated species, degradation products, or closely related variants—often with single-nucleotide resolution.</p><h4><strong>Why Ion Exchange Works: Binding, Retention, and Release</strong></h4><p>Ion exchange chromatography (IEX) relies on electrostatic interactions between analytes and a charged stationary phase. In the case of oligonucleotides, <strong>anion exchange</strong> is used, where negatively charged molecules interact with positively charged functional groups on the resin—most commonly quaternary amines.</p><p>The system consists of two main components:</p><ul><li><strong>Stationary phase:</strong> A positively charged resin that binds anionic analytes.</li><li><strong>Mobile phase:</strong> An aqueous buffer system, typically combined with a salt gradient, that controls both pH and elution strength.</li></ul><p>Retention in AEX is governed primarily by charge. Molecules with weaker overall charge interact less strongly with the stationary phase and elute earlier, while more highly charged oligonucleotides bind more tightly and require stronger elution conditions.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Oligos_Made_Easy_Part_2_AEX_Figure_1_IEX_overview_including_elution_order_dependency_on_analyte_charge_3419ad3075.jpg" alt="KNAUER: Oligos Made Easy - Part 2 AEX: Figure 1 IEX overview including elution order dependency on analyte charge." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Oligos_Made_Easy_Part_2_AEX_Figure_1_IEX_overview_including_elution_order_dependency_on_analyte_charge_3419ad3075.jpg 245w," sizes="100vw" width="1583" height="654"></p><h4><strong>The Five-Step Workflow of Ion Exchange Chromatography</strong></h4><p>AEX separations generally follow a well-established sequence of steps:</p><ol><li><strong>Column equilibration</strong><br>The column is conditioned with the starting buffer until the baseline and pH are stable. This ensures that all charged sites on the resin are ready for interaction.</li><li><strong>Sample loading</strong><br>Samples, prepared in the starting buffer, are introduced under conditions that promote binding of the target oligonucleotides while minimizing retention of unwanted impurities.</li><li><strong>Washing</strong><br>The column is washed with the starting buffer to remove uncharged or weakly interacting components. The baseline stabilizes as these species are flushed away.</li><li><strong>Elution</strong><br>Bound oligonucleotides are released using a salt or pH gradient. Increasing ionic strength introduces competing ions that displace the analytes from the resin. Weakly bound species elute first; strongly charged oligonucleotides elute later.</li><li><strong>Regeneration and re-equilibration</strong><br>A high-salt buffer removes any remaining bound material. The column is then returned to starting conditions in preparation for the next analysis.</li></ol><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Oligos_Made_Easy_Part_2_AEX_Figure_2_Five_steps_of_IEX_procedure_in_blue_outlined_using_an_example_chromatogram_in_red_38dd70b1b1.jpg" alt="KNAUER: Oligos Made Easy - Part 2 AEX: Figure 2  Five steps of IEX procedure (in blue), outlined using an example chromatogram (in red)." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Oligos_Made_Easy_Part_2_AEX_Figure_2_Five_steps_of_IEX_procedure_in_blue_outlined_using_an_example_chromatogram_in_red_38dd70b1b1.jpg 245w," sizes="100vw" width="1583" height="674"></p><h4><strong>Why AEX Is Especially Effective for Oligonucleotides</strong></h4><p>The repeating phosphate backbone of oligonucleotides gives rise to a strong and uniform anionic character across a wide pH range (typically pH 7–9). This makes oligonucleotides exceptionally well suited for anion exchange separations.</p><p>Key factors influencing AEX behavior include:</p><ul><li><strong>Charge density:</strong> Longer oligonucleotides carry more negative charges and therefore exhibit stronger retention.</li><li><strong>Resin chemistry:</strong> Strong and weak anion exchangers differ in functional groups and pH stability, influencing selectivity and robustness.</li><li><strong>Buffer composition:</strong> The choice of buffering ions and salt gradients directly affects elution strength and resolution.</li></ul><p>Salt gradients—commonly based on chloride ions—compete with the oligonucleotide backbone for binding sites on the resin. By carefully tuning gradient slope and composition, analysts can achieve highly reproducible and finely resolved separations.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Oligos_Made_Easy_Part_2_AEX_Figure_3_Ionic_interactions_and_p_H_influence_on_Anion_Exchange_Chromatography_AEX_612e231ba4.jpg" alt="KNAUER: Oligos Made Easy - Part 2 AEX: Figure 3 Ionic interactions and pH influence on Anion Exchange Chromatography (AEX)." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Oligos_Made_Easy_Part_2_AEX_Figure_3_Ionic_interactions_and_p_H_influence_on_Anion_Exchange_Chromatography_AEX_612e231ba4.jpg 245w," sizes="100vw" width="1547" height="593"></p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Oligos_Made_Easy_Part_2_AEX_Figure_4_AEX_buffer_selection_and_gradient_strategy_chromatogram_with_red_buffer_gradient_curve_53fd1bb11b.jpg" alt="KNAUER: Oligos Made Easy - Part 2 AEX: Figure 4 AEX buffer selection and gradient strategy (chromatogram with red buffer gradient curve)." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Oligos_Made_Easy_Part_2_AEX_Figure_4_AEX_buffer_selection_and_gradient_strategy_chromatogram_with_red_buffer_gradient_curve_53fd1bb11b.jpg 245w," sizes="100vw" width="1600" height="327"></p><h4><strong>AEX as the Gold Standard for Oligonucleotide Separation</strong></h4><p>Anion exchange chromatography has become the method of choice for both analytical and preparative oligonucleotide workflows. Its advantages include:</p><ul><li><strong>High resolving power:</strong> Closely related impurities, including n–1 or n–2 species, can often be separated and quantified.</li><li><strong>Predictable retention behavior:</strong> In many cases, retention time correlates linearly with oligonucleotide length, simplifying identification.</li><li><strong>Compatibility with modified oligonucleotides:</strong> Even chemically modified sequences retain their anionic nature, allowing AEX to resolve both products and related impurities.</li><li><strong>Excellent control via gradient elution:</strong> Salt gradients provide precise tuning of selectivity and resolution.</li></ul><p>Typically, shorter or degraded oligonucleotides elute at lower ionic strength, while full-length products with higher charge density appear later in the chromatogram.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Oligos_Made_Easy_Part_2_AEX_Figure_5_AEX_Advantages_and_Challenges_7835521e34.jpg" alt="KNAUER: Oligos Made Easy - Part 2 AEX: Figure 5 AEX Advantages and Challenges." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Oligos_Made_Easy_Part_2_AEX_Figure_5_AEX_Advantages_and_Challenges_7835521e34.jpg 245w," sizes="100vw" width="1535" height="707"></p><h4><strong>Final Perspective: Mastering AEX with Confidence</strong></h4><p>Anion exchange chromatography may appear complex at first, but with thoughtful optimization of pH, buffer composition, and gradient conditions, it becomes a highly precise and reliable tool for oligonucleotide analysis. When properly applied, AEX delivers sharp peaks, excellent resolution, and robust performance—even for challenging sequences and modifications.</p><p>For laboratories developing or refining oligonucleotide workflows, AEX offers both analytical depth and operational confidence.</p><blockquote><p>If you would like to discuss AEX method development or optimization for oligonucleotides, feel free to contact us at <strong>sales@knauer.net</strong>. More insights into practical oligonucleotide analysis will follow in our <i>“Oligos Made Easy”</i> series.</p><p>For technical questions or in-depth discussion, the author can be reached at <strong>kindler@knauer.net</strong></p></blockquote>

Oligos Made Easy - Part 2: AEX

<p><strong>Although modern agriculture needs to be based on accurate real-time data on soil, plant, and environmental conditions, affordable, sufficiently sensitive, and robust monitoring devices for this purpose are currently missing. According to scientists, low-cost sensors based on new smart materials and printing technologies offer a suitable solution. The results of multidisciplinary research thus far and proposals for the development of these devices have been presented by researchers from Czechia, Great Britain, Spain, and the USA in a review article in the prestigious journal </strong><a target="_blank" rel="noopener noreferrer" href="https://www.nature.com/articles/s41467-026-68778-6#Abs1"><i><strong>Nature Communications</strong></i></a><strong>.</strong></p><p>“<i>Sensor technologies for monitoring plant health are still in their infancy. Only simple sensors capable of monitoring basic parameters such as pH, soil moisture, or temperature are commonly available on the market. However, if farmers are to face current challenges, including climate change, and ensure sufficient food for humanity, they need much more effective tools that will enable them to monitor, for example, various pathogens, including bacteria and fungi. In our opinion, a suitable solution is a combination of new smart materials and printing for the production of inexpensive, durable, and scalable materials</i>,” said the article’s first author, <strong>David Panáček</strong> from CATRIN, who worked on the study during his internship at Imperial College London.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/CATRIN_Soucasne_senzory_nestaci_Vedci_navrhuji_novou_cestu_ke_sledovani_zdravi_rostlin_b4014952a3.jpg" alt="CATRIN: David Panáček" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_CATRIN_Soucasne_senzory_nestaci_Vedci_navrhuji_novou_cestu_ke_sledovani_zdravi_rostlin_b4014952a3.jpg 208w," sizes="100vw" width="1536" height="1152"></p><p>Sensors for monitoring plant health, for example, lag behind similar devices used in human medicine. According to the authors, advances in materials science, which will enable the development of scalable sensor technologies, play a key role in this potential shift. “<i>Printing techniques, including inkjet printing, screen printing, aerosol printing, 3D printing, and direct laser writing, offer flexible ways to produce flexible sensors, large-area sensors, and sensors integrated directly into plants. The review article summarizes recent advances in printable low-dimensional materials for agricultural sensors, analyzes their physico-chemical properties in relation to sensor performance, and discusses key challenges and future opportunities requiring interdisciplinary integration</i>,” said one of the corresponding authors, <strong>Michal Otyepka</strong>.</p><p>The research brought together materials scientists, chemists, biologists, sensing experts, and printing technology specialists. Materials research and the use of graphene-based smart materials were led by scientists from CATRIN at Palacký University and VŠB-Technical University of Ostrava. Plant biologists from CATRIN contributed their knowledge of plant development, their responses to stress conditions, and the monitoring of their properties. Researchers from Imperial College London took care of the electronics, while representatives from<a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/companies/36"><strong> CEITEC – VUT</strong></a> focused on printing technologies. The team also included leading experts in sensing from the Catalan Institute of Nanoscience and Nanotechnology in Barcelona, and Joseph Wang of the University of California San Diego, the “father of sensing and electrochemistry,” also contributed his extensive knowledge.</p><p>“<i>This is a groundbreaking study on this topic, which has managed to attract some truly big names in their respective fields. Last but not least, the study demonstrates that interdisciplinarity at CATRIN gives rise to completely new and promising research topics, such as plant sensing and its use for studying plant-environment interactions and smart agriculture,</i>” added another corresponding author, <strong>Nuria De Diego</strong>.</p>

Current sensors are not good enough. Scientists propose a new way to monitor plant health

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The Czech Advanced Technology and Research Institute (CATRIN) at Palacký University is a cutting-edge scientific hub dedicated to advancing research in the fields of nanotechnology, biotechnology, and biomedicine. At its core, CATRIN boasts outstanding scientific teams, featuring international researchers. We emphasize interdisciplinarity, foster global collaborations, and work to translate our research findings into practical applications.

CATRIN

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.

Organomation

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.

KNAUER

Thermo Scientific Syncronis aQ C18 Polar Endcapped HPLC Columns

The polar end-capped C18 phase in Thermo Scientific Syncronis aQ Column provides optimal retention of polar analytes and is fully compatible with 100% aqueous mobile phases. 

<p><strong>Ensure consistent, predictable liquid chromatography (LC) separations of polar analytes using Thermo Scientific™ Syncronis™ aQ Columns. High surface area silica and dense stationary phase coverage minimize secondary interactions and deliver reproducible high-resolution separations. The polar end-capped C18 phase provides optimal retention of polar analytes and is fully compatible with 100% aqueous mobile phases. Manufactured and rigorously tested in ISO 9000 facilities, these columns are designed to meet a range of analytical needs including fast method development, quantitative analysis, and quality control.</strong></p><h5><strong>Highly Reproducible Separations</strong></h5><ul><li>Rigorously tested stationary phase bonded to the highest quality silica ensures consistent, predictable LC performance</li></ul><h5><strong>Excellent Peak Shapes for Enhanced Resolution and Sensitivity</strong></h5><ul><li>Dense surface coverage of silica minimizes secondary interactions and peak tailing</li></ul><h5><strong>Exceptional Column-to-Column Consistency</strong></h5><ul><li>Manufactured, packed, and tested in ISO-9000-accredited facilities</li><li>Every column individually tested to meet stringent retention, efficiency, and peak symmetry specifications</li><li>Enhanced automated packing process</li></ul><h5><strong>Alternative Selectivity</strong></h5><ul><li>Polar end-capped C18 stationary phase enhances retention of polar analytes</li></ul><h5><strong>Compatible with Highly Aqueous Mobile Phases</strong></h5><ul><li>Polar end-capping allows use of 100% aqueous mobile phases without loss of performance or stability</li></ul><h5><strong>Available in Three Particle Sizes</strong></h5><ul><li>1.7μm for rapid ultrahigh-performance LC (UHPLC) separations</li><li>3μm and 5μm for more traditional HPLC analysis</li></ul><h4><strong>Specifications</strong></h4><ul><li><strong>Column type:</strong> Reversed Phase</li><li><strong>Endcapped: </strong>Polar</li><li><strong>Max. Pressure:</strong> 5800 psi (400 bar)</li><li><strong>Packing Material:</strong> Spherical, Fully Porous, Ultrapure Silica</li><li><strong>Stationary phase:</strong> C18</li><li><strong>USP Type:</strong> L1</li><li><strong>Surface Area:</strong> 320 m<sup>2</sup>/g</li><li><strong>Temperature:</strong> 60°C</li><li><strong>Carbon load: </strong>19%</li><li><strong>Phase:</strong> Reversed Phase</li><li><strong>Pore Size: </strong>100 Å</li><li><strong>pH: </strong>2 to 8</li></ul><h4><strong>Syncronis HPLC and UHPLC Columns</strong></h4><h5><strong>Enter a new world of chromatography</strong></h5><p>When developing a new method, one of the most important goals for the chromatographer is to achieve a consistent, reproducible separation. This makes selecting an HPLC column that offers highly-reproducible results essential to attaining this goal.</p><h5><strong>Features of Syncronis columns</strong></h5><p>Thermo Scientific Syncronis LC columns achieve high levels of consistency and reproducibility through:</p><ul><li>Highly-pure, high-surface-area silica</li><li>Dense bonding and double endcapping</li><li>Stringent manufacturing and testing protocols</li></ul>

Thermo Scientific Syncronis Silica HPLC Columns

Optimize the reproducibility of normal phase chromatographic separations using Thermo Scientific™ Syncronis™ Silica LC Columns.

<p><strong>Optimize the reproducibility of normal phase chromatographic separations using Thermo Scientific™ Syncronis™ Silica LC Columns. Highly pure, base-deactivated, high surface area silica media ensure robust, high-resolution separations of nonpolar and moderately polar organic compounds by normal phase chromatography.</strong></p><p>Manufactured and rigorously tested in ISO 9000 facilities, these columns are designed to meet a range of analytical needs including fast method development, quantitative analysis and quality control.</p><h5><strong>Excellent Reproducibility in Normal Phase Chromatography</strong></h5><ul><li>Highest quality silica ensure consistent, predictable LC performance</li><li>Exceptional Column-to-Column Consistency</li><li>Manufactured, packed and tested in ISO-9000-accredited facilities</li><li>Every column individually tested to meet stringent retention, efficiency and peak symmetry specifications</li><li>Enhanced automated packing process</li></ul><h5><strong>Available in Three Particle Sizes</strong></h5><ul><li>1.7μm for rapid ultrahigh-performance LC (UHPLC) separations</li><li>3μm and 5μm for more traditional HPLC analysis</li></ul><h4><strong>Specifications</strong></h4><ul><li><strong>Column type:</strong> Normal Phase</li><li><strong>Max. Pressure:</strong> 5800 psi (400 bar)</li><li><strong>Packing Material:</strong> Spherical, Fully Porous, Ultrapure Silica</li><li><strong>Stationary phase:</strong> Silica</li><li><strong>USP Type:</strong> L3</li><li><strong>Surface Area:</strong> 320 m<sup>2</sup>/g</li><li><strong>Temperature:</strong> 60°C</li><li><strong>Phase:</strong> Normal Phase</li><li><strong>Pore Size: </strong>100 Å</li><li><strong>pH: </strong>2 to 8</li></ul><h4><strong>Syncronis HPLC and UHPLC Columns</strong></h4><h5><strong>Enter a new world of chromatography</strong></h5><p>When developing a new method, one of the most important goals for the chromatographer is to achieve a consistent, reproducible separation. This makes selecting an HPLC column that offers highly-reproducible results essential to attaining this goal.</p><h5><strong>Features of Syncronis columns</strong></h5><p>Thermo Scientific Syncronis LC columns achieve high levels of consistency and reproducibility through:</p><ul><li>Highly-pure, high-surface-area silica</li><li>Dense bonding and double endcapping</li><li>Stringent manufacturing and testing protocols</li></ul>

Thermo Scientific Syncronis Amino HPLC Columns

Improve the consistency and reliability of your liquid chromatography (LC) separations with Thermo Scientific™ Syncronis™ Amino LC Columns.

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Thermo Scientific SurePac Bio 550 SEC MDi HPLC Columns

SurePac™ Bio 550 SEC MDi™ column delivers high-resolution, reproducible AAV size-based separations with 3 μm silica, 550 Å pores, and bioinert hardware for optimal recovery and QC reliability.

<p><strong>Experience the future of Size-Exclusion Chromatography (SEC) with SurePac™ Bio 550 SEC MDi™ analytical columns and guards exclusively designed to deliver robust and reproducible performance at high resolution and throughput to accelerate your therapeutics analysis process. The column's groundbreaking MDi™ technology integrates our advanced 3 μm monodisperse silica particle platform with bioinert hardware to ensure superior reliability for best sample recovery. SurePac™ Bio 550 SEC MDi™ column is ideal for AAV gene therapeutics analysis and offers excellent selectivity due to the dedicated smaller particle (3 μm) size combined with wide-pore (550Å) for separating monomeric AAVs from aggregates based on their size differences.</strong></p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Thermo_Scientific_Sure_Pac_Bio_550_SEC_M_Di_HPLC_Columns_3_8391a584e0.jpg" alt="Thermo Scientific: SEM image of 3μm monodisperse silica particles (left) vs. 3 μm polydisperse particles (right)" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Thermo_Scientific_Sure_Pac_Bio_550_SEC_M_Di_HPLC_Columns_3_8391a584e0.jpg 245w," sizes="100vw" width="1023" height="508"></p><p>SurePac Bio 550 SEC MDi columns and guards are based on high-purity, spherical, porous (550 Å), 3 μm monodispersed silica particles that are covalently modified with a proprietary diol hydrophilic layer. This unique design yields shorter diffusion distances and enhanced reproducible mass transfer and narrower peaks. The consistent size of these particles facilitates precise control over media synthesis and column packing, significantly improving column-to-column and lot-to-lot reproducibility. The columns are housed in a hydrophilic bioinert-coated stainless-steel hardware to eliminate secondary interactions, ensuring optimal performance during the initial injection process.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Thermo_Scientific_Sure_Pac_Bio_550_SEC_M_Di_HPLC_Columns_043f131056.jpg" alt="Thermo Scientific: SurePac Bio 550 SEC MDi HPLC Columns" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Thermo_Scientific_Sure_Pac_Bio_550_SEC_M_Di_HPLC_Columns_043f131056.jpg 156w," sizes="100vw" width="650" height="650"></p><ul><li>Ideal for AAV gene therapy characterization and quality control assessment due to selectivity of the dedicated smaller particle (3 μm) combined with wide-pore (550Å) size</li><li>Superior column-to-column and lot-to-lot reproducibility eliminates column variability as a concern in stability and QA/QC testing</li><li>High-efficiency peaks with excellent recovery</li><li>Higher resolution and throughput for fast turnaround time without sacrificing performance</li><li>Bioinert hardware to eliminate analyte adsorption</li></ul><h4><strong>Specifications</strong></h4><ul><li><strong>Max. Pressure: </strong>3500 psi (241 bar)</li><li><strong>Packing Material:</strong> Monodisperse Silica Resin</li><li><strong>Flow Rate: </strong>0.6 mL/min</li><li><strong>Temperature:</strong> 20°C to 60°C</li><li><strong>Phase:</strong> Size Exclusion</li><li><strong>Particle Size: </strong>3 μm</li><li><strong>pH: </strong>2 to 8</li></ul>

Thermo Scientific Hypersil GOLD C18 Selectivity HPLC Columns

Achieve exceptional peak shape and resolution for your HPLC and LC/MS applications with Thermo Scientific™ Hypersil GOLD™ HPLC columns. 

<p><strong>Achieve exceptional peak shape and resolution for your HPLC and LC/MS applications with Thermo Scientific™ Hypersil GOLD™ HPLC columns.</strong> These endcapped, ultrapure, silica-based columns deliver significant reduction in peak tailing using generic gradients with C18 selectivity. With their excellent resolution, efficiency, and sensitivity, Hypersil GOLD columns give you confidence in the accuracy and quality of your analytical data.</p><h5><strong>Novel Bonding</strong></h5><ul><li>Proprietary derivatization and endcapping</li><li>C18 (USP L1) selectivity</li></ul><h5><strong>pH Stability</strong></h5><ul><li>Robust performance at high pH</li><li>Excellent column stability at low pH</li></ul><h5><strong>Flexible Formats</strong></h5><ul><li>Javelin HTS columns for high-throughput screening</li><li>Semi-preparative columns with 12 μm particles available</li></ul><h4><strong>About the Hypersil GOLD Family of HPLC Columns</strong></h4><p>Meet the challenges of modern chromatography with state-of-the-art columns that provide outstanding performance and consistent separations. Twelve different column chemistries are available so you can optimize separations and maximize productivity. Get outstanding peak shapes in reversed phase, ion exchange, HILIC, or normal phase chromatography.</p><ul><li>Excellent peak symmetry</li><li>Narrow peaks for outstanding efficiency</li><li>Enhanced sensitivity and improved resolution</li><li>Exceptional reproducibility for reliable chromatography, column after column</li><li>Solutions for high-throughput screening</li><li>1.9, 3, and 5 μm particle sizes for all your separation needs</li></ul><h4><strong>Specifications</strong></h4><ul><li><strong>Endcapped:</strong> Yes</li><li><strong>For Use With:</strong> LC/MS</li><li><strong>Max. Pressure: </strong>5800 psi (400 bar)</li><li><strong>Packing Material:</strong> Spherical, Fully Porous, Ultrapure Silica</li><li><strong>Stationary Phase:</strong> C18 Selectivity</li><li><strong>Surface Area:</strong> 220 m²/g</li><li><strong>Temperature:</strong> 60°C</li><li><strong>USP Type: </strong>L1</li><li><strong>Carbon Load</strong>: 11%</li><li><strong>Phase:</strong> Reversed Phase</li><li><strong>Pore Size: </strong>175 Å</li><li><strong>pH: </strong>1 to 11</li></ul>

Thermo Scientific Accucore RP-MS HPLC Columns

Optimized for MS detection, Thermo Scientific™ Accucore™ RP-MS LC Columns are an excellent combination of speed and quality of separation.

<p><strong>Optimized for MS detection, Thermo Scientific™ Accucore™ RP-MS LC Columns are an excellent combination of speed and quality of separation.</strong></p><p>Based on Core Enhanced Technology, Accucore columns provide fast, high-resolution separations—without the elevated backpressures required by sub-2μm particles.</p><ul><li>Fast separations with excellent resolution and sensitivity</li><li>Lower backpressures so that UHPLC is not required</li><li>Optimized for MS detection</li><li>Excellent peak shapes</li><li>Excellent combination of speed and efficiency</li></ul><h4><strong>Specifications</strong></h4><ul><li><strong>Endcapped:</strong> Yes</li><li><strong>For Use With:</strong> HPLC</li><li><strong>Max. Pressure: </strong>14500 psi (1000 bar)</li><li><strong>Packing Material:</strong> Spherical, Solid Core, Ultrapure Silica</li><li><strong>Particle Shape:</strong> Spherical Solid Core</li><li><strong>Stationary Phase:</strong> Proprietary</li><li><strong>Surface Area:</strong> 130 m²/g</li><li><strong>Temperature:</strong> 60°C</li><li><strong>USP Type: </strong>N/A</li><li><strong>Carbon Load</strong>: 7%</li><li><strong>Phase:</strong> Reversed Phase</li><li><strong>Pore Size: </strong>80 Å</li><li><strong>pH: </strong>2 to 9</li></ul>

Thermo Scientific Accucore aQ C18 Polar Endcapped HPLC Columns

Separate polar compounds with improved speed and resolution using Thermo Scientific™ Accucore™ aQ C18 Polar Endcapped LC columns.

<p><strong>Separate polar compounds with improved speed and resolution using Thermo Scientific™ Accucore™ aQ C18 Polar Endcapped LC columns. Rugged 2.6μm solid-core particles enable fast, high-efficiency separations at low backpressures.</strong></p><p>The polar endcapped C18 stationary phase provides optimal retention of polar analytes and is fully compatible with 100% aqueous mobile phases. Robust bonding technology and automated packing procedures ensure excellent reproducibility and long column lifetimes.</p><h5><strong>Alternative Selectivity</strong></h5><ul><li>Polar endcapped C18 stationary phase provides optimum retention of polar analytes</li><li>Accucore aQ Columns are compatible with highly aqueous mobile phases.</li><li>Polar encapping allows use in 100% aqueous mobile phases without loss of performance or stability.</li></ul><h5><strong>Fast Separations</strong></h5><ul><li>2.6μm core-enhanced technology particles enable operation at high flow rates without generating excessive backpressures.</li></ul><h5><strong>Excellent Peak Shapes for Enhanced Resolution and Sensitivity</strong></h5><ul><li>Solid-core 2.6μm particles and narrow particle size distribution reduce band broadening and improve separation efficiencies.</li><li>High surface coverage of silica minimizes secondary interactions and peak tailing.</li></ul><h5><strong>Low Backpressures</strong></h5><ul><li>Solid-core 2.6μm particles for less backpressure compared to UHPLC sub-2μm particles</li><li>Compatible with conventional HPLC instrumentation and UHPLC platforms</li></ul><h5><strong>Excellent Reproducibility and Robustness</strong></h5><ul><li>Advanced bonding technology</li><li>Automated packing process</li></ul><h4><strong>Specifications</strong></h4><ul><li><strong>Endcapped:</strong> Polar</li><li><strong>Max. Pressure: </strong>14500 psi (1000 bar)</li><li><strong>Packing Material:</strong> Spherical, Solid Core, Ultrapure Silica</li><li><strong>Particle Shape:</strong> Spherical Solid Core</li><li><strong>Stationary Phase:</strong> C18</li><li><strong>Surface Area:</strong> 130 m²/g</li><li><strong>Temperature:</strong> 70°C</li><li><strong>USP Type: </strong>L1</li><li><strong>Carbon Load</strong>: 9%</li><li><strong>Phase:</strong> Reversed Phase</li><li><strong>Pore Size: </strong>80 Å</li><li><strong>pH: </strong>2 to 9</li></ul>

Thermo Scientific Accucore Polar Premium HPLC Columns

Achieve fast, high-resolution separations of polar and nonpolar analytes using Thermo Scientific™ Accucore™ Polar Premium LC columns.

<p><strong>Achieve fast, high-resolution separations of polar and nonpolar analytes using Thermo Scientific™ Accucore™ Polar Premium LC columns. Rugged 2.6μm solid-core particles enable fast, high-efficiency separations at low backpressures.&nbsp;</strong></p><p>The robust amide-embedded C18 stationary phase provides unique selectivity complementary to conventional C18 columns, is stable from pH 1.5–10, and is fully compatible with highly aqueous mobile phases. Robust bonding technology and automated packing procedures ensure excellent reproducibility and long column lifetimes.</p><h5><strong>Alternative Selectivity</strong></h5><ul><li>Polar embedded reverse phase material offers complementary selectivity to standard C18 columns.</li></ul><h5><strong>Stable over Wide pH Range</strong></h5><ul><li>Specially designed bonded phase is stable from pH 1.5–10.5.</li></ul><h5><strong>Compatible with Highly Aqueous Mobile Phases</strong></h5><ul><li>Rugged amide-embedded C18 phase will not undergo phase collapse in 100% aqueous mobile phase.</li></ul><h5><strong>Fast Separations</strong></h5><ul><li>2.6μm core-enhanced technology particles enable operation at high flow rates without generating excessive backpressures.</li></ul><h5><strong>Excellent Peak Shapes for Enhanced Resolution and Sensitivity</strong></h5><ul><li>Solid-core 2.6μm particles and narrow particle size distribution reduce band broadening and improve separation efficiencies.</li><li>High surface coverage of silica minimizes secondary interactions and peak tailing.</li></ul><h5><strong>Low Backpressures</strong></h5><ul><li>Solid-core 2.6μm particles for less backpressure compared to UHPLC sub-2μm particles</li><li>Compatible with conventional HPLC instrumentation and UHPLC platforms</li></ul><h5><strong>Excellent Reproducibility and Robustness</strong></h5><ul><li>Advanced bonding technology</li><li>Automated packing process</li></ul><h4><strong>Specifications</strong></h4><ul><li><strong>Endcapped:</strong> Yes</li><li><strong>Max. Pressure: </strong>14500 psi (1000 bar)</li><li><strong>Packing Material:</strong> Spherical, Solid Core, Ultrapure Silica</li><li><strong>Particle Shape:</strong> Spherical Solid Core</li><li><strong>Stationary Phase:</strong> Polar Embedded</li><li><strong>Surface Area:</strong> 90 m²/g</li><li><strong>Temperature:</strong> 70°C</li><li><strong>USP Type: </strong>L60</li><li><strong>Carbon Load</strong>: 9%</li><li><strong>Phase:</strong> Reversed Phase</li><li><strong>Pore Size: </strong>150 Å</li><li><strong>pH: </strong>1.5 to 10.5</li></ul>

Thermo Scientific Accucore Phenyl-Hexyl HPLC Columns

Offer unique selectivity for aromatic and moderately polar analytes with Thermo Scientific™ Accucore™ Phenyl-Hexyl LC Columns.

<p><strong>Offer unique selectivity for aromatic and moderately polar analytes with Thermo Scientific™ Accucore™ Phenyl-Hexyl LC Columns.</strong></p><p>Based on Core Enhanced Technology, Accucore columns provide fast, high-resolution separations without the elevated backpressures required by sub-2μm particles.</p><ul><li>Fast separations with excellent resolution and sensitivity</li><li>Lower backpressures so that UHPLC is not required</li><li>Mixed-Mode Selectivity for Aromatic and Moderately Polar Analytes</li><li>Enhanced Pi-pi Interactions with Aromatics</li><li>Moderate Hydrophobicity</li></ul><h4><strong>Specifications</strong></h4><ul><li><strong>Endcapped:</strong> Yes</li><li><strong>For Use With:</strong> HPLC</li><li><strong>Max. Pressure: </strong>14500 psi (1000 bar)</li><li><strong>Packing Material:</strong> Spherical, Solid Core, Ultrapure Silica</li><li><strong>Particle Shape:</strong> Spherical Solid Core</li><li><strong>Stationary Phase:</strong> Phenyl/Hexyl</li><li><strong>Surface Area:</strong> 130 m²/g</li><li><strong>Temperature:</strong> 70°C</li><li><strong>USP Type: </strong>L11</li><li><strong>Carbon Load</strong>: 5%</li><li><strong>Phase:</strong> Reversed Phase</li><li><strong>Pore Size: </strong>80 Å</li><li><strong>pH: </strong>2 to 8</li></ul>

Products from category Analytical HPLC columns focused on LC columns distributed by Thermo Fisher Scientific (EMEA) - page 1

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