syringe filters for hplc sample preparation-Aijiren HPLC Vials. Wholesale Sterile Syringe Filters. 1.Membrane: PTFE, PVDF, PES, MCE, NYLON, PP, CA, etc. 2.Pore Size: 0.22 Aijiren Syringe Filter for HPLC. The membrane materials produced by Aijiren are provided by the most famous All syringe filters are HPLC certified. Green 13mm Nylon