Sepax Technologies
Biological Separation Solution
Size Exclusion Columns
Analytical and Preparative Size Exclusion
Unix™, Zenix®, Zenix®-C, SRT®, SRT®-C, SRT®-10, SRT®-10C and Nanofilm® are eight SEC product lines developed based on innovative surface coating and particle technologies comprised of uniform, hydrophilic, and neutral nanometer thick films chemically bonded on 1.8 µm, 3 µm, 5 µm, or 10 µm high purity and mechanically stabilized silica.
Utilizing two unique surface coating technologies - stand-up monolayer bonded on porous silica for Unix™, Zenix®, SRT® and SRT®-10; and lay-down monolayer on porous silica for Zenix®-C, SRT®-C, and SRT®-10C, Sepax offers surface chemistry choices based on sample type and sample hydrophobicity in order to achieve high resolution performance separation.
Find Your Right Particle Size
| Product Line | Unix™ | Zenix® / Zenix®-C | SRT® / SRT®-C | SRT®-10 / SRT®-10C |
| Particle size | 1.8 µm | 3 µm | 5 µm | 10 µm |
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Pore size (Å)
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200, 300
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80, 100, 150, 300
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100, 150, 300, 500, 1000, 2000 |
100, 300, 500, 1000
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| Resolution & Efficiency | Highest | Higher | High | Purification |
| Instruments | UHPLC, HPLC | HPLC | HPLC | HPLC, FPLC |
Find Your Suitable Surface Chemistry
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Product Line
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Unix™ Zenix® SRT® SRT®-10
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Zenix®-C SRT®-C SRT®-10C
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Surface structure
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Chemically bonded stand-up monolayer
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Chemically bonded lay-down monolayer
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Recommended Sample Types
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Non-Hydrophobic samples like Monoclonal antibodies, proteins, peptides, nucleic acids, oligonucleotides, virus, and water-soluble polymers
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"Tough samples" such as Hydrophobicproteins like insulin, membrane protein monoclonal antibodies derivatized with polymer branches, e.g. polypeptide, PEG.
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Nanofilm® is made with a special stationary phase - a polymeric brush coating. Such a neutral, hydrophilic polymer coating is suitable for positively charged proteins and hydrophobic proteins, such as membrane proteins.
Product Line : Nanofilm®
Particle size : 5 µm
Pore size : 150, 250 and 450 Å
Efficiency : High
Selectivity : Same for SRT® and Zenix™
Surface structure : Chemically bonded polymeric coating
Recommended Sample Types : Highly positively charged proteins, hydrophobic proteins like membrane protein
Particle size : 5 µm
Pore size : 150, 250 and 450 Å
Efficiency : High
Selectivity : Same for SRT® and Zenix™
Surface structure : Chemically bonded polymeric coating
Recommended Sample Types : Highly positively charged proteins, hydrophobic proteins like membrane protein