Analytical Sample Preparation - Acrodisc Syringe Filter . Authorized Wholesale Dealer of Analytical Sample Preparation - Acrodisc Syringe Filter, Nylon Membrane 0.2 um, 25 mm 4436, Acrodisc PSF GxF Syr. Filters, GHP Membrane, 25 mm AP4559, MN TLC Plate and GN-6 Metrice MCE Memb.