<h3>A Dedicated Solution for Oligonucleotide Analysis</h3>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.<h3>Sepapure oliGO – Designed for Oligonucleotide Separations</h3>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.<a target="_blank" rel="noopener noreferrer" href="https://www.knauer.net/columns-oligonucleotide-columns">Sepapure oliGO</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.<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"><h3>Method Transfer and Comparative Performance</h3>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.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.<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"><h3>Low Backpressure for Reliable Operation</h3>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.<h3>Best Practices for Column Performance</h3>To maintain optimal performance, users should observe recommended operating conditions, including a broad pH range of 1.5–10 and temperatures up to 60 °C. Employing a guard column can prevent coarse synthesis by-products from reaching the analytical column. If pressure increases are observed, backflushing at low flow rates can restore performance.When the system is idle, thorough flushing to remove salts is essential. For storage, the column should be kept in a 1:1 mixture of methanol–water or acetonitrile–water. 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.<h3>Beyond Analytical Separations</h3>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.<blockquote><ul><li>If you're planning to set up or optimize your oligonucleotide workflow, feel free to contact us at sales@knauer.net. Stay tuned for more exciting insights into the Oligonucleotide world in our “Oligos Made Easy” series.</li><li>For more in-depth discussion or questions, reach out to the author at folmert@knauer.net&nbsp;</li></ul></blockquote>

Oligos Made Easy - Part 8: Sepapure oliGO

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

KNAUER

KNAUER AZURA® Bio Compact SEC FPLC System

AZURA Compact SEC systems handle time-consuming SEC methods in your lab without occupying your valuable FPLC system.

KNAUER protein purification: The flexible FPLC platformAZURA® Bio purification systems&nbsp;complete solutions for FPLC on a minimum footprint: AZURA FPLC systems combine flexibility and reliability. The biocompatible/metal-free FPLC is the perfect choice for your protein purification task.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_AZURA_Bio_Compact_AC_FPLC_System_6_a874551078.jpg" alt="KNAUER: AZURA® Bio Compact AC FPLC System." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_AZURA_Bio_Compact_AC_FPLC_System_6_a874551078.jpg 245w," sizes="100vw" width="1506" height="600">Design your AZURA Bio purification system to fit your needs. Multiple functionalities such as automatic sample injection via autosampler, column switching, buffer and sample selection, and fraction collection enable automation of the purification process.A wide range of detectors ensures the visibility of target molecules. Various flow rates and compatibility with columns from all vendors provide maximum flexibility. The intuitive PurityChrom® software integrates all the advantages of a versatile purification system.<h3>AZURA® Bio Compact SEC FPLC System</h3><h4>For Size Exclusion Chromatography (SEC)</h4>AZURA Compact SEC systems take over time-consuming SEC methods in your lab without blocking your valuable FPLC system. Due to its compact design and intuitive FPLC software PurityChrom®, the system offers outstanding performance and ease of use.&nbsp;Pre-designed methods are included in the software for the designated SEC system and can be easily adapted by changing the column volume. AZURA Compact SEC supports all columns available on the market.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_AZURA_Bio_Compact_SEC_FPLC_System_4_f5efb08061.jpg" alt="KNAUER: AZURA® Bio Compact SEC FPLC System " srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_AZURA_Bio_Compact_SEC_FPLC_System_4_f5efb08061.jpg 245w," sizes="100vw" width="1358" height="540"><h3>Key features</h3><ul><li data-start="93" data-end="157">Flow rate: 0.001–10 ml/min (recommended: 0.1–8.0 ml/min)</li><li data-start="158" data-end="197">Maximum system pressure: 50 bar</li><li data-start="198" data-end="276">Injection system: Injection valve for sample injection via sample loop</li><li data-start="277" data-end="347">Detection: Variable single wavelength UV detector (190–500 nm)</li><li data-start="348" data-end="423">Fraction collection: Fraction collector for automated fractionation</li><li data-start="424" data-end="522">Column compatibility: Supports columns from all vendors, including third-party SEC columns</li><li data-start="523" data-end="611">Software: Intuitive and powerful PurityChrom® software, 21 CFR Part 11 compliant</li><li data-start="612" data-end="780">System design:<ul data-start="637" data-end="780"><li data-start="637" data-end="666">Isocratic buffer delivery</li><li data-start="669" data-end="687">Loop injection</li><li data-start="690" data-end="734">Wide range of collection racks available</li><li data-start="737" data-end="780">Specially designed for SEC applications</li></ul></li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_AZURA_Bio_Compact_SEC_FPLC_System_3_7a4bc1f60b.jpg" alt="KNAUER: AZURA® Bio Compact SEC FPLC System " srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_AZURA_Bio_Compact_SEC_FPLC_System_3_7a4bc1f60b.jpg 245w," sizes="100vw" width="1920" height="1152">Don't use your valuable gradient FPLC system for boring and time-consuming size exclusion separations. Choose your dedicated AZURA SEC system.<figure class="image"><img style="aspect-ratio:690/490;" src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_AZURA_Bio_Compact_SEC_FPLC_System_45d5079064.webp" alt="KNAUER: AZURA® Bio Compact SEC FPLC System." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_AZURA_Bio_Compact_SEC_FPLC_System_45d5079064.webp 220w," sizes="100vw" width="690" height="490"></figure>With its compact design and intuitive software, the system offers excellent performance, ease of use and supports all SEC columns available on the market.​

Products from category Preparative chromatographs focused on GPC/SEC - page 1

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Oligos Made Easy - Part 8: Sepapure oliGO

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