On Wed, 20 Mar 2002 01:20:22 GMT, Neal Machtiger
<nmachtiger at comcast.net> wrote:
>Such methods are widely published and readily available.
>>Try the microbiology manual at www.ctfa.org,
CTFA is a good organization, but the methods should still be USP if
the tests are for regulatory purposes in the US. Other wise any ctfa
method is worth a try but should eb used with causion. For instance
in one of my article I wrote with Don Orth (Neutrogena), we compared
the CTFA vs. USP, vs. the D-value method for preservative efficacy --
all reqiire count data methods.
> the FDA Bacteriological
There are few methods for cosmetics in this manual, if any -- the
manual is basically for food prodiucts. I don't think the Preparatory
test is in there, for instance.
> or the FDA web site- www.fda.gov.
They just refer you to the USP, via CRF 21.