Standard Operating Procedure The International Conference on Harmonization (ICH) defines a SOP as “detailed, written instructions to achieve uniformity of the performance of a specific function”.
A technique that uses special filters to sort and/or wash solutions on a molecular level. May also be referred to as concentration and dialysis. Pictured is a Pellicon UF/DF system with tubing running through a peristaltic pump. The lines are inserted into an Erlenmeyer flask containing the UF/DF membrane storage solution.