RE: ORGLIST:Lyophilisation to remove Ammonium

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From: Jon Kremsky (jkremsky$##$primeorg.com)
Date: Tue Feb 17 2004 - 08:55:32 EST


Nick: Lyophilization will work, but will probably require several
iterations. Bring the pH to near neutrality with some acetic acid. That
gives ammonium acetate, which is a fugitive salt. After a few
lyophilizations, the acetic acid and ammonia ought to be gone.

Jon Kremsky

-----Original Message-----
From: everybody-admin$##$orglist.net [mailto:everybody-admin$##$orglist.net]On
Behalf Of nickclark$##$infinito.it
Sent: Monday, February 16, 2004 9:33 AM
To: everybody$##$orglist.net
Subject: ORGLIST:Lyophilisation to remove Ammonium

I am trying to remove water and ammonium from a
saline-like biological sample.

Is lyophilisation likely to be an appropriate way of doing
this? Loss of other volatiles is not a problem, though I
would like to retain glucose.

Any suggestions would be most welcome.

Yours faithfully

Nick Clark

St George's Hospital Medical School
United Kingdom
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