In principle, 100% of filtration membranes should retain particles. To test this hypothesis, various syringe microfilters (pore sizes either 0.2 or 0.45 µm) were tested for air particle retention using a Lasair® II particle measurement system.
Higher sample recovery prevents loss of precious samples and ensures accurate results:
Lower hold-up volume prevents loss of precious samples. Graph shows comparison of recovery from 0.2 µm pore size PVDF membrane syringe filters.