RT Journal Article SR Electronic T1 A Total Organic Carbon Analysis Method for Validating Cleaning Between Products in Biopharmaceutical Manufacturing JF PDA Journal of Pharmaceutical Science and Technology JO PDA J Pharm Sci Technol FD Parenteral Drug Association (PDA) SP 13 OP 19 VO 45 IS 1 A1 Baffi, R. A1 Dolch, G. A1 Garnick, R. A1 Huang, Y. F. A1 Mar, B. A1 Matsuhiro, D. A1 Niepelt, B. A1 Parra, C. A1 Stephan, M. YR 1991 UL http://journal.pda.org/content/45/1/13.abstract AB The validation of cleaning procedures for biopharmaceutical products produced by recombinant DNA (rDNA) technology presents a diverse analytical challenge. This is because of the need for quantitation of a broad range of potential residual cellular components, including proteins, carbohydrates, and nucleic acids, as well as trace levels of detergents at various manufacturing stages. The validation of a Total Organic Carbon (TOC) analysis method for use in cleaning validation studies is presented. The method has a limit of detection of approximately 0.1 ppm, with a limit of quantitation of 0.5 ppm. TOC analysis has an accuracy of 50 to 70% or better in the 0.5- to 10-ppm range and demonstrates an overall variability of approximately 5%. The method is broadly applicable to a variety of impurities and contaminants that are likely to be encountered following the manufacture of rDNA products.