Cleaning Pipetteman Shafts for PCR

Andre Hamel hamel at
Thu Mar 16 21:11:09 EST 2000

In <38D17330.C7D77A8C at> Rob Kirkpatrick <kirkpat at> writes:

The shafts of Gilson Pipetteman are resistant to just about ANYthing.
They appear to be made of something akin to teflon, are autoclavable and
nearly indestructable.

I occassionally go as far as to soak a DRY shaft in chromic-sulfuric acid
(chromerge) for several hours. One MUST rinse in H2O VERY well afterward.

Also, these shafts are resistant to chloroform, phenol, most dyes, etc.
If stained by dyes, they can be easily washed by saoking in appropriate
solvents. ... The Gilson chemists obviously did their homework VERY well
while designing those pipettor shafts.

They're even resistant to hydrofluoric acid used by researchers working in
the petroleum industry [micropaleantologists] ... (Hi Una!). Not that I'm
overly biased nor do I own stocks, etc, but Eppendorf pipettors are not
nearly as resistant, even chloroform damages their shafts ... gumming
things up. Nor are they as easy to maintain and repair ON SITE. Pity, eh?


>Does anyone know what the limits are on cleaning Pipetteman shafts in
>diluted HCl to make them clean for PCR?  We kind of eyeball the amount
>of HCl we use aiming for something like 4-5% and soak the shafts for 30
>min or more.  Are these shafts resistant to HCl?  We use Gilson



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