The pore sizes can be fine enough to retain bacteria and thus produce a sterile liquid (logarithmic retention of bacteria up to LRV 8). The dirt holding capacity of a PURAFIX® depth filter sheet can be up to 4 kg per m2. In the filtration process, solid particles are slowed down and eventually retained by the tortuous path inside the filter sheet and by electrokinetical interactions («zeta potential»). Through this unique mechanism, a high capacity (long lifetime of filter until plugging) can be achieved. PURAFIX® is a highly pure depth filter media with low ion and a low pyrogen release. All materials are FDA approved.
The broad variety of available porosities allow for their use in a wide range of applications. Porosity grades are available from coarse over fine to germ reducing and germ removing filtration («sterile filtration»).
Examples of industries:
– API (Active pharmaceutical ingredients)
– Biotech (pharmaceuticals)
– Beverage (spirits)
– Herbal or other natural extracts
– Pharmaceutical intermediates