PT - JOURNAL ARTICLE AU - Jennings, T. A. TI - Residual Gas Analysis and Vacuum Freeze Drying DP - 1980 Jan 01 TA - PDA Journal of Pharmaceutical Science and Technology PG - 62--69 VI - 34 IP - 1 4099 - http://journal.pda.org/content/34/1/62.short 4100 - http://journal.pda.org/content/34/1/62.full SO - PDA J Pharm Sci Technol1980 Jan 01; 34 AB - This paper is a study of the composition of gases present during vacuum freeze drying. The residual gas analyzer and its associated high vacuum system are described. Cracking patterns for various substances associated with the freeze drying process and equipment are presented. The change in gas composition is shown at various times during the drying process.