Which of the following not used in preservation efficacy test?
a) S aureus
b) B subtilis
c) A niger
d) C albicans
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Answer:
correct option is (s aureus)
Explanation:
The ISO 11930 preservative efficacy test method is based on the inoculation of a personal care product with a known concentration of 5 relevant strains of microorganisms, specifically S. aureus, E. coli, P. aeruginosa, C.
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