Sartorius Minisart™ SRP Syringe Filters are ready-to-use, PTFE membrane units for ultracleaning of small volume samples for HPLC or GC analysis. 16533K – Product Catalog. Minisart® Syringe Filter, Polyethersulfone (PES), Pore Size 0.45 µm, Ethylene Oxide, Female Luer Lock, Male Luer Slip, Pack Size 50, by Sartorius. Captiva Syringe Filters | HPLC – Aijiren