Black Cyclopore membranes
Ideal for epifluorescence and other microscopy applications requiring a contrasting background. The polycarbonate membrane is used to filter the sample and is then used directly for analysis. The dark membrane gives lower background fluorescence and improves the sensitivity of the test.
Black Nuclepore membranes
Membranes for use with Epifluorescence Microscopy
Nuclepore black dyed polycarbonate membranes are high performance membranes ideally suited for applications using epifluorescence microscopy. Black membranes greatly reduce background fluorescence, which results in improved microorganism and particulate visibility.
Using these membranes in combination with epifluorescence techniques, rapid enumeration of viable and non-viable microorganisms and particulate matter can be conducted in 30 minutes or less. Conventional culturing methods require incubation times of more than 24 hours. Use black track-etched membranes with epifluorescence techniques to achieve rapid, direct enumeration of microorganisms.
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. |
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