Syringe Filters – Pall Shop Non-sterile syringe filters are used across a range of filtration and sample preparation applications. They are widely used in analytical chemistry for sample Trace2 PTFE Membrane Syringe Filter, 25mm, 0.22μm, 100-pk Product Size, Pack of 100. For Use With, HPLC, SPE. Type, Syringe Filter. Diameter (Metric), 25mm.