Factors To Show The Filters' Quality
Followed is the factors to show the syringe filters' quality:
Bubble Point — tests the pore size of the membrane again.
Water Breakthrough — confirms the pore size and tests the backpressure required to pass a water sample. This will be different for hydrophilic and hydrophobic membranes.
Burst Pressure — tests the membrane strength and that the membrane has been mounted correctly in the filter.
Filter Integrity — tests the actual filter fabrication and moulding to ensure that the housing rating is correct.
HPLC Extractables — tests each membrane to ensure low extractable levels and consistency from lot to lot.
Efficiency — tests the overall efficiency of the filter using known standards. Cronus filters are rated for high sample volume and filtration efficiency.
Filter Retention Volume — tests for residual sample left in the filter after use.