Free sample 0.22 um syringe filter exporter-Analytical . Oct 29, 2021 · Free sample ptfe membrane filter 0.22 um for petrochemicals Syringe Filters, PTFE/Nylon/PVDF/Pes Membrane 0.22/0.45 Um Pore Size, 25mm Diameter, 100 PCS 2018 Hot Sales Medical Ste . Sample prep 0.45um hplc filter vials distributor captiva-HPLC