1.1 This test method determines the bacterial retention characteristics of membrane filters for liquid filtration using Pseudomonas diminuta as the challenge organism. This test may be employed to evaluate any membrane filter system used for liquid sterilization.

1.2 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.