<h3><strong>A Dedicated Solution for Oligonucleotide Analysis</strong></h3><p>Oligonucleotides have become key players in modern pharmaceutical and biological research, particularly in the development of highly targeted and personalized therapies. As increasing numbers of oligonucleotide-based drugs enter clinical trials or receive regulatory approval, analytical laboratories face growing demands for both throughput and data quality. These molecules present unique chromatographic challenges due to their long, highly polar structures and subtle variations in nucleobase sequence or functionalization.</p><h3><strong>Sepapure oliGO – Designed for Oligonucleotide Separations</strong></h3><p>Selecting the optimal chromatographic approach for oligonucleotide analysis can be complex. Many laboratories rely on ion-pair reversed-phase (IP-RP) chromatography because of its speed, robustness, and compatibility with mass spectrometry. However, commonly used ion-pair reagents can degrade conventional silica-based stationary phases.</p><p><a target="_blank" rel="noopener noreferrer" href="https://www.knauer.net/columns-oligonucleotide-columns"><strong>Sepapure oliGO</strong></a> addresses this limitation through a hybrid silica matrix combined with specialized surface end-capping, ensuring resistance to aggressive IP-RP reagents. Its functionalized surface enables both strong reversed-phase interactions and controlled ionic contributions, effectively creating a mixed-mode separation mechanism. This design results in improved durability compared with standard mixed-mode columns, making Sepapure oliGO a robust choice for routine oligonucleotide workflows.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Figure_1_Sepapure_oli_GO_columns_with_laser_etched_column_information_23f545be81.jpg" alt="KNAUER: Figure 1 - Sepapure oliGO columns with laser-etched column information." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Figure_1_Sepapure_oli_GO_columns_with_laser_etched_column_information_23f545be81.jpg 223w," sizes="100vw" width="1186" height="828"></p><h3><strong>Method Transfer and Comparative Performance</strong></h3><p>In collaboration with BianoGMP GmbH, KNAUER’s application team evaluated Sepapure oliGO against a widely used reference column. The study compared oligonucleotides of varying lengths and purities, including a fully thiolated 43-mer DNA. Particular attention was paid to potential interactions between thiolated oligonucleotides and stainless-steel hardware, which have been reported to cause peak tailing.</p><p>The results demonstrated that direct method transfer between the reference column and Sepapure oliGO was generally feasible without significant adjustment. Chromatographic resolution remained comparable, while retention times were slightly shorter on Sepapure oliGO. Furthermore, the anticipated benefits of expensive bioinert hardware were not confirmed under the tested conditions, suggesting that such effects may primarily influence very fast (U)HPLC separations.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Figure_2_Overlayed_chromatogram_of_crude_product_of_a_43mer_thiolate_oligonucleotide_7ae9613efd.jpg" alt="KNAUER: Figure 2: Overlayed chromatogram of crude product of a 43mer thiolate oligonucleotide. Light blue - reference column and dark blue – Sepapure oliGO." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Figure_2_Overlayed_chromatogram_of_crude_product_of_a_43mer_thiolate_oligonucleotide_7ae9613efd.jpg 245w," sizes="100vw" width="1223" height="453"></p><h3><strong>Low Backpressure for Reliable Operation</strong></h3><p>Sepapure oliGO can be applied effectively in both HPLC and (U)HPLC workflows. Its low operating backpressure minimizes risks associated with clogging, excessive system wear, and performance deterioration over time. Typical IP-RP separations using 3 µm particles generated pressures around 200 bar, enabling laboratories without ultra-high-pressure systems to perform high-quality oligonucleotide analysis.</p><h3><strong>Best Practices for Column Performance</strong></h3><p>To maintain optimal performance, users should observe recommended operating conditions, including a broad <strong>pH range of 1.5–10</strong> and <strong>temperatures up to 60 °C.</strong> Employing a <strong>guard column</strong> can prevent coarse synthesis by-products from reaching the analytical column. If pressure increases are observed, backflushing at low flow rates can restore performance.</p><p>When the system is idle, thorough flushing to remove salts is essential. For storage, the column should be kept in a <strong>1:1 mixture of methanol–water</strong> or <strong>acetonitrile–water.</strong> Gradient transitions are recommended when switching between standard RP eluents and IP-RP reagents. Regeneration procedures developed for RP columns are also suitable for Sepapure oliGO.</p><h3><strong>Beyond Analytical Separations</strong></h3><p>For large-scale purification, ion-exchange chromatography (AEX) may offer advantages. Scalable preparative systems are available to support purification workflows, ranging from compact laboratory setups to pilot-scale platforms with flow rates up to 800 mL/min. Bioinert configurations can be integrated where required, allowing laboratories to tailor purification solutions to their specific oligonucleotide applications.</p><blockquote><ul><li>If you're planning to set up or optimize your oligonucleotide workflow, feel free to contact us at <strong>sales@knauer.net</strong>. Stay tuned for more exciting insights into the Oligonucleotide world in our “<strong>Oligos Made Easy</strong>” series.</li><li>For more in-depth discussion or questions, reach out to the author at <strong>folmert@knauer.net&nbsp;</strong></li></ul></blockquote>

Oligos Made Easy - Part 8: Sepapure oliGO

<p><strong>Visit the LabRulez booth at </strong><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/events/871"><strong>analytica 2026</strong></a><strong> in Munich, 24. - 27. March 2026! You can find us in Hall A1, Booth A1.506. At the booth, you will be able to explore live demonstrations of how the LabRulez portals work and see selected analytical instruments from our pre-owned marketplace section.</strong></p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Lab_Rulez_at_Analytica_2026_Floor_plan_55e1057e03.jpg" alt="LabRulez at Analytica 2026: Hall A1 Floor Plan and Booth Location" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Lab_Rulez_at_Analytica_2026_Floor_plan_55e1057e03.jpg 245w," sizes="100vw" width="1516" height="881"></p><h3><strong>Would you like to learn how the LabRulez portals work?</strong></h3><p>➡︎ <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/"><strong>LabRulezLCMS</strong></a><br>➡︎ <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/"><strong>LabRulezGCMS</strong></a><br>➡︎ <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/"><strong>LabRulezICPMS</strong></a></p><ul><li>A <strong>unique online solution</strong> for <strong>your marketing</strong></li><li>A <strong>targeted audience</strong> from the <strong>analytical chemistry community</strong></li><li><strong>Modern technologies</strong> and a unique concept</li><li><strong>Design optimized for most smart devices</strong> – PC, mobile, and tablet</li><li><strong>Advanced statistical tools</strong> fully available to users</li></ul><h3><strong>Services Offered</strong></h3><h4><strong>News + Company Updates</strong></h4><ul><li>Publish <strong>news related to your instrumentation, applications, services, events, job openings</strong>, and more</li><li><strong>News is shared</strong> both on our <strong>portals</strong> and across our <strong>social media channels</strong></li></ul><h4><strong>Library – All Documents in One Place</strong></h4><ul><li><strong>Applications, posters, presentations, technical articles, brochures, specifications</strong></li><li><strong>Fas</strong>t and <strong>advanced search</strong> capabilities</li><li>Over <strong>32,000 documents</strong> currently available in our database</li></ul><h4><strong>Webinars</strong></h4><ul><li><strong>Upcoming and on-demand webinars</strong> from the field of analytical chemistry</li><li>More than <strong>5,500 webinars</strong> covering chromatography, mass spectrometry, and spectroscopy</li></ul><h4><strong>Careers</strong></h4><ul><li><strong>Targeted job</strong> listings in <strong>analytical chemistry</strong></li><li>Clear filtering by specialization or location</li><li><strong>Increased visibility for job postings</strong></li></ul><h4><strong>Companies</strong></h4><ul><li><strong>Company profile</strong> with key information and contacts</li><li><strong>Integration of all your activities on our portal:</strong> News, Library documents, Webinars, Upcoming Events, Careers, and mentions by partners or customers</li><li><strong>Connection to your Products </strong>listed on LabRulez portals</li></ul><h4><strong>Products and Services</strong></h4><ul><li>Comprehensive <strong>overview of instrumental techniques and services</strong></li><li>Targeting the analytical chemistry community and customers in the growing online environment</li></ul><h4><strong>Marketplace</strong></h4><ul><li><strong>Buying and selling pre-owned analytical equipment</strong></li><li>We purchase analytical instrumentation of all brands and ages</li><li><strong>Sell your equipment through LabRulez</strong></li><li>Request and purchase <strong>complete systems, modules</strong>, or <strong>spare parts</strong> with warranty and service</li></ul><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Lab_Rulez_at_analytica_2026_bazar_7edf4a0872.jpg" alt="LabRulez at analytica 2026" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Lab_Rulez_at_analytica_2026_bazar_7edf4a0872.jpg 88w," sizes="100vw" width="1600" height="2844"></p><h3><strong>What Will Be on Display at Our Booth?</strong></h3><p>Come and explore selected spare parts and modules from our marketplace section. These include both new, tested, and pre-owned items.</p><h4><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/bazaar"><strong>LabRulezLCMS Marketplace</strong></a></h4><p><strong>Spare parts for LC/MS:</strong></p><ul><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/bazaar?category=378"><strong>Vacuum turbo pumps for LC/MS</strong></a></li></ul><p><strong>Spare parts for HPLC:</strong></p><ul><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/bazaar?category=397"><strong>Degassers for HPLC/UHPLC</strong></a></li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/bazaar?category=368&amp;search=valve"><strong>Automatic valves for HPLC</strong></a></li><li>HPLC components for Agilent 1100, 1200, and 1260 Infinity II series</li></ul><p><strong>Consumables:</strong></p><ul><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/bazaar?category=377"><strong>HPLC lamps</strong></a></li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/bazaar?category=48"><strong>HPLC columns</strong></a></li></ul><h4><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/bazaar"><strong>LabRulezGCMS Marketplace</strong></a></h4><p><strong>Spare parts for GC/MS:</strong></p><ul><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/bazaar?category=367&amp;search=turbo"><strong>Turbo pumps for GC/MS</strong></a></li></ul><p><strong>Spare parts for GC:</strong></p><ul><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/bazaar?category=366&amp;search=EPC"><strong>EPC modules</strong></a></li></ul><p><strong>Sample injection</strong></p><ul><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/bazaar/432"><strong>Autosampler 7693A for GC</strong></a></li></ul><p><strong>Consumables:</strong></p><ul><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/bazaar?category=7"><strong>GC columns </strong></a>and selected accessories</li></ul>

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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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Waters ACQUITY UPC2 System

Waters ACQUITY UPC2 System allows the manipulation of fluids with a wide range of polarities and enables scientists to separate, analyze, and understand compounds that have challenged all other LC and GC technologies.

<div><div><h4><strong>The ease of reversed-phase meets the power of normal-phase</strong></h4></div></div><div><div><p><strong>In reversed-phase chromatography, polar compounds are eluted first, causing routine and complex separation challenges. With convergence chromatography, however, polar compounds are retained and eluted last - providing the separation power of normal-phase liquid chromatography (LC) with the ease-of-use of reversed-phase LC.</strong></p><div><div><div><div><p>Using green and non-toxic <strong>compressed liquid CO₂</strong> as a primary mobile phase, the <strong>ACQUITY UPC2® System</strong> delivers the ability to precisely vary <strong>mobile phase strength, pressure, and temperature</strong>. The ability to <strong>fine-tune the resolving power and selectivity</strong> of the system enables better control over the retention of analytes for <strong>separating, detecting, and quantifying</strong> structural analogs, isomers, and <strong>enantiomeric and diastereomeric mixtures</strong> – all compounds that are often a challenge to separate by any other means.</p><ul><li>The chromatographic principles and selectivity of <strong>normal-phase LC</strong></li><li>The ease of use and method development simplicity of <strong>reversed-phase LC</strong></li><li>The use of <strong>gradients across the widest polarity range</strong></li><li><strong>Chiral and achiral separations</strong> in one system, with unequaled speed and confidence</li></ul></div></div><div><div><h5><strong>Recommended Use</strong></h5><p>To solve routine and complex separations challenges that require<strong> unparalleled selectivity and ease-of-use</strong>.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_UPC_2_System_43f37e1130.jpg" alt="Waters ACQUITY UPC2 System: ACQUITY UPC2 System gives scientists the ability to precisely vary mobile phase strength, pressure, and temperature." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_UPC_2_System_43f37e1130.jpg 234w," sizes="100vw" width="1024" height="682"></p><div><div><h3><strong>Bringing ease of use to normal-phase LC</strong></h3><p>By providing the ability to precisely vary <strong>mobile phase strength, pressure, and temperature</strong>, the <strong>Waters ACQUITY UPC<sup>2</sup> System</strong> gives scientists the power to better control the retention of analytes for <strong>separating, detecting, and quantifying</strong> structural analogs, isomers, and <strong>enantiomeric and diastereomeric mixtures</strong>.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_UPC_2_System_6_c2a18a19b3.jpg" alt="Waters ACQUITY UPC2 System: Separation of propranolol and hydroxy metabolites. Note that each hydroxy metabolite has an R and S form." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_UPC_2_System_6_c2a18a19b3.jpg 235w," sizes="100vw" width="1024" height="681"></p></div></div><div><div><h3><strong>The world's first convergence chromatography system</strong></h3><p>Unique in its capabilities, the pioneering <strong>ACQUITY UPC<sup>2</sup> System</strong> delivers what the rest of the industry never could – a system, based on the principles of <strong>normal-phase LC</strong>, with the <strong>ease-of-use of reversed-phase LC</strong>, and purposefully built for analytical performance, placing <strong>convergence chromatography</strong> atop the list of separations tools in the kit of all analytical chemists.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_UPC_2_System_7_2efdc13cd5.jpg" alt="Waters ACQUITY UPC2 System: UPC2 analysis can be 30x faster and use 75x less solvent per run - all with 100x lower cost per analysis." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_UPC_2_System_7_2efdc13cd5.jpg 182w," sizes="100vw" width="1024" height="879"></p></div></div><div><div><h3><strong>Unparalleled resolving power and selectivity</strong></h3><p>With its <strong>separation potential for a far broader chemical spectrum</strong> of applications than that of reversed-phase LC-based instrumentation, the <strong>ACQUITY UPC<sup>2</sup> System</strong> leverages <strong>convergence chromatography</strong> to enable superior performance, using <strong>inexpensive, compressed CO₂</strong> as a non-toxic mobile-phase.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_UPC_2_System_8_655b0ad41e.jpg" alt="Waters ACQUITY UPC2 System: The ACQUITY UPC2-MS FFA analysis provides a simple and fast method with a significant reduction in analysis time compared to alternative techniques such as GC-MS, which requires FAME derivatization." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_UPC_2_System_8_655b0ad41e.jpg 232w," sizes="100vw" width="1024" height="691"></p></div></div><div><div><h3><strong>Retention mechanisms and orthogonality to RPLC</strong></h3><p>Harnessing what's now known as <strong>convergence chromatography</strong>, an evolution of the traditional <strong>SFC</strong> technique, the <strong>ACQUITY UPC<sup>2</sup> System</strong> has the power to create <strong>selective separations of structurally similar chiral and achiral compounds</strong>.</p><p>The <strong>miscibility of CO₂ with a wide range of polar and non-polar organic solvents</strong> has made the liquid CO₂-based mobile phase versatile enough to separate a much wider range of compounds than reversed-phase LC, especially for mixtures containing polar compounds. Not only can CO₂-based solvents be used with both polar and non-polar stationary phases, but chromatography can be influenced by modulating solvent gradients with a much wider choice of columns using the same <strong>mass spectrometry-compatible co-solvents</strong>.</p><p>Being <strong>orthogonal to reversed-phase LC</strong>, <strong>UP<sup>C2</sup> separations</strong> often show an <strong>inverse order of elution</strong> among groups of analytes. In combination with various detection techniques, this orthogonality is <strong>valuable for confirming analyte identity in complex matrices</strong>.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_UPC_2_System_9_dc03654861.jpg" alt="Waters ACQUITY UPC2 System: With ACQUITY UPC2 System, orthogonality to the most commonly used high/low pH approach in reversed-phase can be clearly seen as a useful addition to the separation challenges faced by synthesis analysis." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_UPC_2_System_9_dc03654861.jpg 200w," sizes="100vw" width="1024" height="801"></p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_UPC_2_System_2_454af0c6e1.jpg" alt="Waters ACQUITY UPC2 System: ACQUITY UPC2 System with ACQUITY QDa Detector." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_UPC_2_System_2_454af0c6e1.jpg 234w," sizes="100vw" width="1024" height="682"><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_UPC_2_System_3_72c8ad4d63.jpg" alt="Waters ACQUITY UPC2 System: ACQUITY UPC2 System with Xevo TQ-XS." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_UPC_2_System_3_72c8ad4d63.jpg 234w," sizes="100vw" width="1024" height="682"><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_UPC_2_System_4_e2672f200d.jpg" alt="Waters ACQUITY UPC2 System: ACQUITY UPC2 System with ACQUITY UPLC ELS, ACQUITY UPC2 PDA, and ACQUITY QDa Detectors." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_UPC_2_System_4_e2672f200d.jpg 234w," sizes="100vw" width="1024" height="682"><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_UPC_2_System_5_18c501a159.jpg" alt="Waters ACQUITY UPC2 System: ACQUITY UPC2 System with Xevo G2-XS QTof." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_UPC_2_System_5_18c501a159.jpg 234w," sizes="100vw" width="1024" height="682"></p></div></div></div></div></div></div></div></div>

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Oligos Made Easy - Part 8: Sepapure oliGO

News from LabRulezLCMS Library - Week 13, 2026