An independent study demonstrates that Porvair Sciences proprietary pipette filter tips have greater than 99% Bacterial Filtration Efficiency (BFE), even at an increased challenge level.
The test procedure used was modified from a standard BFE procedure, based upon ASTM F2101, in order to employ a more severe challenge than would be experienced in normal use.
For the testing, a suspension of Staphylococcus aureus, ATCC #6538, was delivered to the pipette filter tip at a challenge level of greater than 105 colony forming units. The challenge was aerosolised using a nebuliser and delivered to the pipette filter tip under tests at a fixed air pressure and flow rate of 5 litres per minute. The aerosol droplets were generated in a glass aerosol chamber and drawn through the pipette filter tip into all glass impingers for collection. The challenge was delivered for a one-minute interval and sampling through the all glass impingers was conducted for two minutes to clear the aerosol chamber. Across a sample set of ten pipette filters tips, the testing demonstrated a mean filtration efficiency of 99.36%. All testing was performed in compliance with US FDA good manufacturing practice (GMP) regulations 21 CFR Parts 210, 211 and 820.
Moulded from Porvair's proprietary Vyon porous plastics, the pipette tip filters are fully compliant with FDA, USP Class VI and European Pharmacopoeia statutory regulations as well as being free from heavy metals. The combination of ultra-clean materials with excellent porosity properties has produced a highly reproducible filtered pipette tip with an excellent edge finish. It always provides an optimum fit into the pipette tip, enabling labs to routinely achieve superior liquid handling and dispensing. For further information please visit https://www.vyonporousplastics.com/pipette-tip-filters/.
To discuss high performance porous plastic components for filtering or separation applications please contact Porvair Sciences Ltd on +44-1978-661144 or enquiries@porvairsciences.com.
