The mixed cellulose ester (MCE) membrane filter is made of cellulose acetate and nitrocellulose, an appropriate amount of acetone, n-butanol, ethanol, etc. Since the MCE membrane is bio-embedded, it is one of the most widely used membranes in analysis and research applications. Hydrophilicity, non-toxicity and hygiene are its biggest advantages. It is a porous membrane filter material with relatively uniform pore size distribution. Absolute pore size and porosity as high as 80‰. It is mainly used for the filtration of water-based solutions, so it is also called water-based membrane. This product is flammable. It should be sealed, moisture-proof and fire-proof during storage.