GVS MCE Filtration Membranes are composed of a mixture of inert cellulose nitrate and cellulose acetate polymers. The uniform microporous structure of these filters provides the fastest flow rates and highest throughputs available in a membrane filter. Because they are biologically inert, GVS MCE Filtration Membranes are ideal for a wide range of clarification, sterilization, and analytical applications such as microbiological analysis, clarification, or sterilization of aqueous solutions, industrial hygiene applications, silt density index, and particulate-matter analysis. For gravimetric analysis using ashing techniques, GVS MCE Membranes yield a residue of less than 0.045% of their initial weight. They are hydrophilic with a noncytotoxic wetting agent and yield extractable levels of less than 4% of their weight. These membranes are autoclavable at 121°C for 20 minutes. Sterilized product lifetime is 24 months from sterilization date.