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- Membrane Filters
- Whatman Membrane Filter Microplus-21 0.45µm 50mm grid Sterile Pack of 400
Whatman Membrane Filter Microplus-21 0.45µm 50mm grid Sterile Pack of 400
Whatman Membrane Filter Microplus-21 0.45µm 50mm grid Sterile Pack of 400
- £529.42 excl. VAT
- £635.30incl. VAT
SKU - 1153289
10407114
SKU -
1153289
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Print Page- Cellulose nitrate
- 50mm diameter
- 0.45µm pore size
- White filter with a black grid
- STL: individually packed suitable for dispenser Membrane butler
Whatman sterile MicroPlus cellulose nitrate membrane filters are for microbiological quality control. The STL version is compatible with Membrane-Butler and other membrane filter dispensers. In microbiological QC testing, liquid is first filtered through a membrane, allowing the microorganisms to collect on the surface. The filter is then incubated on a nutrient medium, and individual colonies are evaluated via a microbial contamination test. Designed specifically for microbiological QC
- High mechanical strength and flow rate
- Tested for bubble point, bacterial retention, flow rate, recovery rate, and sterility
- Individually packaged for convenience and sterility
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. |
