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| Disposable Syringe filters |
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| CHROMAFIL® Syringe Filters |
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Advantages of CHROMAFIL® syringe filter:
Polypropylene housing – considerably better solvent stability compared to acrylate and polystyrene filters, low content of extractable substances
Housing ultrasonically sealed, not glued – no extractable components from glues. The special thick rim of the housing is ideal for use of the filters in laboratory robots (e. g. Benchmate™).
Filtration in both directions – the liquid cannot bypass the membrane
Luer lock on side of entry – safe connection on the ”high pressure“ side
Luer exit – standard luer for 3 and 25 mm filters, minispike luer with low dead volume and small OD for 15 mm filters. Filter inlet and filter exit can be fitted to the CHROMABOND® columns for selective sample preparation with the aid of a special adaptor.
Colour coded filters – filters with 0.2 μm pores have a yellow upper shell, that of filters with 0.45 μm pores is colourless; the different membrane types are distinguished by different colours of the lower shell
Pore sizes – 0.2 and 0.45 μm available (exceptions: PET filters with 1.2 μm, glass fibre filters with 1 μm, PES filters with 5 μm)
Filter sizes – 25, 15 and 3 mm diameter The small diameter filters are especially recommended for very small samples, which require extremely low dead volumes: 80 μl for 25 mm diameter, 12 μl for 15 mm diameter, 5 μl for 3 mm diameter
All filters can be autoclaved at 121 °C and 1.1 bar for 30 min.
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Depending on your filtration task you can choose filter membranes made from different materials:
Regenerated cellulose (RC)
- hydrophilic membrane with very low adsorption
- for aqueous and organic/aqueous liquids, i. e. polar and medium polar sample solutions
- binding capacity for proteins 84 μg/filter
Teflon® (PTFE)
- hydrophobic membrane
- for nonpolar liquids and gases
- very resistant towards all kinds of solvents as well as acids and bases
- flushing with alcohol, followed by water, makes the originally hydrophobic membrane more hydrophilic
Cellulose mixed esters (MV)
- hydrophilic membrane
- for aqueous or polar solutions
Cellulose acetate (CA)
- hydrophilic membrane
- for filtration of water-soluble oligomers and polymers, especially suited for biological macromolecules
- very high shape stability in aqueous solutions
- extremely low binding capacity for proteins (21 μg/filter)
- also available in a sterile package (S) for filtration under sterile conditions (each filter individually sealed)
Polyamide (PA) = Nylon
- rather hydrophilic membrane
- for aqueous and organic/aqueous medium polar liquids
Polyethersulfone (PES)
- hydrophilic membrane
- for aqueous and slightly organic liquids with higher flow rates
- very low adsorption for pharmaceuticals and proteins
- for sterile filtration of non-sterile solutions we recommend the CHROMAFIL® Sterilizer PES (each filter individually sealed)
- binding capacity for proteins for both types 29 μg/filter
Polyvinylidene difluoride (PVDF)
- hydrophilic membrane
- for polar and nonpolar solutions, water-soluble oligomers and polymers like proteins
- binding capacity for proteins 82 μg/filter
- the PVDF filter with integrated glass fibre prefilter is recommended for filtration of biological samples with high particle loads. This filter features a high
- binding capacity for proteins.
Glass fiber (GF)
- inert filter, nominal pore size 1 μm, allows higher flow rates than small pore filters
- for solutions with high loads of particulate matter or for highly viscous solutions (e. g. soil samples, fermentation broths)
- as prefilters for other CHROMAFIL® filters, they prevent plugging of the membrane
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| Ask for no obligatory trial samples of syringe filters.
(Valid only in India)
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| All respective trademarks acknowledged. |
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