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- NL17 Membrane Circles, Polyamide, 0.45µm, 25mm Pack of 100
NL17 Membrane Circles, Polyamide, 0.45µm, 25mm Pack of 100
- £133.19 excl. VAT
- £159.83incl. VAT
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Print Page- Polyamide membranes
- hydrophilic
- 25mm diameter
- 0.45µm pore size
Whatman Polyamide filters are made from pure polyamide making them the universal choice for clarification and sterile filtration.
Polyamide membrane filters are mechanically very strong and exhibit excellent strength wet or dry. They are hydrophilic making them suitable for both aqueous and organic solutions. The membranes can be used up to 135°C.
NL16 grade offer 0.2µm pore size, while NL17 have 0.45µm pore size.
Guide to…Membrane Filter Properties
Identifying the filter material most suitable for your application based upon the nature of the liquid or gas you are filtering will ensure the best performance of your filter. Each membrane filter material has differing chemical and physical properties such as hydrophobicity, flow rate, extractables and protein retention making them suited to differing applications. Once you have selected the most compatible filter material, you will need to consider what pore size is most appropriate.
| Membrane Material | Protein binding | Hydrophilic/Hydrophobic | Chemical resistance | Applications |
| Hydrophilic PTFE | Low | Hydrophilic | High | Purification of HPLC organic and solvent/aqueous solutions |
| Hydrophobic PTFE | Low | Hydrophobic | High | Filtration of solvents |
| PES | Low | Hydrophilic | Low/Medium | Purification of tissue culture solutions, buffers |
| PVDF | Low | Hydrophilic | Medium | Filtration of protein solutions |
| NYL | Medium | Hydrophilic | Medium | Filtration of aqueous and solvent/aqueous mixtures |
| CA | Low | Hydrophilic | Low | Filtration of protein solutions |
| CN | High | Hydrophilic | Low | Filtration of aqueous solutions where protein binding is not a concern and microbioloigical applications. |
| RC | Low | Hydrophilic | Medium | Filtration of aqueous and organic solvents and protein recovery applications. |
