sak at execpc.dot.com
Tue Mar 20 23:08:16 EST 2001
On 20 Mar 2001 20:07:19 GMT, lamb <l.a.m.buisman at chello.nl> wrote:
>20% of household bleach is maybe 1% ?
>But the stench !!
>Give me ethanol or isopropanol any time.
Just be sure you're speaking the same language here. % of sodium
hypochlorite or % of "household" bleach which comes in varying
>nmaccallister at webtv.net wrote:
>>Judy,.. isn't 20% rather high? I believe we used a 1% (..or was it
>>0.8%) to kill the spores left after 70% IPA wiping. Isn't it true that
>>Bleach can "pit" stainless steel,.. and must be used with caution?..
>>(Like remembering to wipe it away after 10 mins) Just like with the
>>alcohol (where 70% kills better than 90%) the stronger bleach may also
>>be less effective.
>>One hood-service technician did advocate putting a stronger bleach
>>solution in a pan and leaving it in the (closed) flow hood over the
>>weekend once-a-month (esp, to clean the HEPA filters),.. but I still
>>worry about corroding that S. Steel,.. so I haven't made it a common
>>practice. Any advice?
>>P.S., I have started the "mold/spore titers" you advised me on last
>>month,.. so I am opening a number of plates in the hood these days.
>>Some of them are immediately perceptible odor-wise,.. so I am concerned
>>about spores as well. (20%,.. huh?)
>>And, yes, I will ask my friend down the hall to see if I can borrow some
>>BAC (as the other posting suggests),.. 1% again?,.. and is it kinder to
>>SS? Is it effective against conidia?
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