Message
The hydroxyl-H from
ethanol will exchange but the hydroxyl-O shouldn't. In organic reactions,
ethanol conserves the oxygen since it reacts as ethanolate (C2H5O-), e.g. an
ester made from ethanol and an organic acid (say, acetic acid) will contain the
ethanol-O as ester bond (which is why one uses acetyl chloride or acetanhydride
in acetylation reactions).
Wolfram
Dosn't the OH group exchange with
water? If so, the O18 would be dependent upon the composition of the
water.
At 09:24 AM 10/21/2005 +0200, you wrote:
Dear Andrea,
my lab measured 3
sample of ethanol in the framework of an interlaboratory collaborative study
among 11 labs in the world.
The 18O values and sample description are as
follows:
15.7 0 Vs. V-SMOW - alcohol 95%
-1.4 0 Vs. V-SMOW-
anhydrous synthetic alcohol
19.6 0 Vs. V-SMOW - anhydrous
alcohol
Hoping this could help you.
Giorgio
[log in to unmask]
wrote:
Hello,
I was wondering if anyone has attempted to determine the delta 18O signature of
10% formalin or 85% ethanol. If so, what values did you obtain?
Thank-you,
Andrea
----------------------------------------
This mail sent through www.mywaterloo.ca
--
***************************************************
Dr. Giorgio Capasso
Istituto Nazionale di Geofisica e Vulcanologia
Sezione di Palermo
Via Ugo La Malfa, 153
90146 Palermo - ITALY
tel. +39 091 6809436
+39 091 6809400
fax +39 091 6809449
e-mail [log in to unmask]
***************************************************
Dr. Peter Kroopnick
Home: [log in to unmask]
Work:
[log in to unmask]