CLEANING VALIDATION SAMPLING PROCEDURE The cleaning validation is to verify the effectiveness of the cleaning procedure for removal of product residues, preservatives, excipients and cleaning agents so that the analytical monitoring may be reduced to a minimum in the routine phase. In addition one need to ensure there is no risk associated with cross contamination of active ingredients. Cleaning validation is intended to address special consideration and issues pertaining to validation cleaning procedures for equipment used in the manufactured of pharmaceutical products, radiopharmaceuticals, and biological drugs. The document is also intended to establish inspection consistency and uniformity with respect to equipment cleaning procedures. SAMPLING PROCEDURE In order to evaluate a cleaning method it is necessary to sample the product contact surfaces of the equipment and establish the level of residuals present. i) Swabs and Wipes Method Swabbing is the most wid...