From: Marilyn Vogel (mvogel$##$mail.arc.nasa.gov)
Date: Mon Feb 05 2007 - 17:47:57 EST
I have a contamination problem with polysiloxanes. These may be
coming from some silicone resin or a source of which I am not aware.
They have entered into a particularly valuable sample and I am
wondering if there is anyway to remove them. They seem to have the
TLC and GC elution characteristics exactly like that of the saturated
and unsaturated C16 - C35 straight chain and cyclic hydrocarbon
moiety. Can anyone suggest how to separate them from the hydrocarbons?
I have access to molecular sieves but am not sure what size to use.
The polysiloxanes appear to be n ~ 9 - 11 structural units long.
-- Marilyn Vogel, PhD ORAU Postdoctoral Fellow NASA Ames Research Center Exobiology Branch, MS239-4 Moffett Field, CA 94035 Ph: 650.604.6941 Fax: 650.604.1088 mvogel$##$arc.mail.nasa.gov _______________________________________________ ORGLIST - Organic Chemistry Mailing List Website / Archive / FAQ: http://www.orglist.net To post a message (TO EVERYBODY) send to everybody$##$orglist.net To unsubscribe, send to everybody-request$##$orglist.net the message: unsubscribe your_orglist_password your_address
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