Feb 22, 2022 · The GHP membrane used on Acrodisc, Minispike Syringe Filter, GHP is a hydrophilic propylene membrane suitable for aqueous, and is organic and has minimal protein building. GHP membranes also offer the widest range of chemical compatibility. The 13 mm Minispike filter has a pore size of 0.2 µm and a sample volume below 10 mL.