Evaluation of the effect of preservatives in cosmetic with microbial challenge test

According to the 2010 edition of Chinese Pharmacopoeia Appendix,total plate count method was used to assess the preservative effect of 3 types of cosmetic which were Beijing Drug Administration cosmetic risk survey testing samples in 2010.Three cosmetic samples with recovery rate over 70% were selected to carry out the microbial challenge test.The results showed that all of three kinds of cosmetics passed the challenge test.It not only provided the scientific basis for cosmetic manufacturers to improve preservative efficiency,but also good reference to guarantee consumer health.