Re: Teflon parts\custom ordered.

bcdchin@muccmail.missouri.edu
Thu, 05 Mar 98 11:41:19 CST

The last time (about 5 years ago), Fisher had both stop cocks and sleaves. They
also have telfon sleaves, but the sleves don't seal as well as grease.


David T. Chin, Director
UMC Protein Core
e-mail: bcdchin@muccmail.missouri.edu
(573)882-2027 (office and messaging)
http://www.missouri.edu/~pc/

Hello,
I have a BUCHI rotavap purchased from Brinckmann Co. I suspect that
some vacuum grease may contaminate the product when the continuos feed
is using during the evaporation of hexane/IPA mixture solution.
Unfortunately, Brinckmann does not have Teflon stopcocks. Does anybody
know the place where the custom Teflon stopcock can be ordered? Any
problems with the Teflon "leaking" under vacuum?
Also, the prep. HPLC Rainin system has a prep. rack with polypropylene
funnels that are not resistant to IPA and have a limited resistance to
hexane. I wonder if anybody used Teflon lining or custom ordered glass
funnels?

Thanks,
Michael Breslav
R.W.Johnson PRI
Spring House, PA