non-heat sterilization - suggestions?
kkorth at kcc.com
Thu Oct 12 11:18:54 EST 1995
gstuart2 at sol.UVic.CA (Gregory Stuart) wrote:
>Hello. We use big plastic trays (25cm^2) for plating E. coli and lambda
>phage. They are rather expensive (circa $5 ea.), and we use a lot of them.
>I need a method of sterilizing them, after they have been cleaned, for
>reuse. They cannot be reused. Does anyone have any brilliant (heck - any)
>suggestions! ... :)
>Greg Stuart gstuart2 at sol.uvic.ca
We too use those trays and though we don't "sterilize" them per se, we
have found a way to disinfect them that has been fairly successfull.
We clean out the trays, as you do, and then spray them with 70% isopropyl
alchohol and then put them in a laminar flow biohazard safety cabinet
with the UV lights on for an hour, minimum, to dry and to get UV
irradiated (the inside of the trays toward the UV). With the UV light
still on, we reclose the trays and then use them. We rarely see
contamination from the re-used trays. The UV does discolor the plastic
over time, but it is still cheaper to replace them once every few months
than every use.
I hope that helps.
Neenah, WI 54956
E-mail: kkorth at kcc.com
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