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An innovative challenge test for solid cosmetics using freeze-dried microorganisms and electrical methods
M R S Ferreira1, F R Lourenço1, M T Ohara1
1Department of Pharmacy, Faculty of Pharmaceutical Sciences, University of Sao Paulo, Brazil.
Journal of Microbiological Methods
|September 1, 2014
Abstract:
Freeze-dried bacteria and fungi were used as inoculum in 28 days' PET. An electrical method was used in replacement of the conventional plate count method. The use of freeze-dried microorganisms in association with the electrical method can minimize the workload and the variability involved in PET for cosmetic powders.

