Sterile Membrane Filters
Individually packaged and ready-to-use sterile membranes can be used for colony counting, particle testing, microscopy, and sterility testing. Membrane filters are made of cellulose nitrate, also known as mixed cellulose ester, cellulose acetate, or regenerated cellulose. Choose between individually packaged sterile membranes, gridded or non-gridded, with or without hydrophobic edges.
- Categories: Microbiology | Microbiological Control |
Sterile, gridded membrane filters are widely used in routine microbiological quality control due to the benefits they provide. Whether individually packed or dispenser-ready, membrane filters are ready to use; each filter is individually packaged, offering the highest level of safety while saving preparation time. Each envelope is marked with the filter identification and lot number.
Membrane filters are available in different pore sizes and in three different material types. Cellulose nitrate filters, also known as mixed cellulose esters, contain a mixture of cellulose nitrate and cellulose acetate; this material ensures effective retention together with high flow rates and optimal colony growth. Cellulose acetate combines high flow rates and thermal stability with very low adsorption characteristics. Various filter colors provide the best possible contrast with colonies for easy and reliable quantification and identification.
- Outstanding recovery rates for microorganisms
- 0.45 µm filters according to ISO 7704
- High-flow membranes available
- Three different colors
- Various pore sizes
- Certified quality
- Gamma irradiated at 25 kGray
- Membrane filters comply with the following standards: ISO 7704, ISO 7899-2, ISO 8199, ISO 9308-1, and EN 12780.