I am not aware of any validated method accepted by industry to test AET on dried products. It is my understanding that dried products do not require AET because the water activity is so low. I think I know of one cosmetic company that performed their own validation using spray inoculation, but other than that company, I have heard little on how to perform this testing. I do not have the microbiological testing book from the PCPC, but even in the limited conversations I have had with them, AET isn't required on powder products.
I guess my question is: has anyone performed this? How did you do it? How accurate were the results? Many thanks for your input!
Caron Ockerman | Microbiology Lab Manager
Elba Laboratories | 1925 W. Maple Rd. | Troy, MI 48084
Phone: 248.288.6098 | http://elba-labs.com<http://elba-labs.com/>
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