Process for Selecting a Filter

1. Determine the particle size to be retained or filtered. Membranes will retain all particles equal to, and larger than their designated pore size.

2. Assess the chemical compatibility of the membrane filter with the liquid or gas to be filtered. Consider the chemical resistance properties of all the parts that will contact the filtrate.

3. Depending on the procedure performed, the membrane color or surface pattern may be important.

4. Also consider hydrophilic or hydrophobic membranes, temperature, flow rate, throughput, and sterilization needs