Microporous membrane: Essentially, it is a medium used to achieve two-phase separation. The commonly used solvent filtration microporous membrane in scientific research experiments generally refers to a filter with a pore size of0.1~1A filter membrane between micrometers. Mainly used for filtering mobile phases and samples in chromatographic analysis, and for protecting chromatographic columns The infusion pump system and injection valve are not contaminated and are widely used in weight analysis, microanalysis, colloid separation, and sterile testing.