Re: stable isotopic measurement of
DOC
Amzad,
As Bill pointed out, a TIC/TOC analyzer is a
good way to go, but if you don't have access to a TIC/TOC, you might
want to look at the Gandhi et al. (2004) paper as an alternative
technique.
Gandhi H., Wiegner T.N.,
Ostrom P.H., Kaplan L.A. and Ostrom N.E. (2004)
Isotopic (13C) analysis of dissolved organic carbon in stream water
using an elemental analyzer coupled to a stable isotope ratio mass
spectrometer.
Rapid Communications in Mass Spectrometry, 18: 903-906
Good luck!
Cheers,
Simon
Amzad
We use a TIC/TOC analyzer system interfaced to a continuous flow IRMS
for
13C analysis of DIC and DOC. In this system, phosphoric acid drives
DIC to
CO2, which is purged from the sample. Then a persulfate digestion is
used to
convert DOC to DIC, which is converted to CO2 and transferred to He
carrier.
-Bill
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Bill Holmes
UC-Davis Stable Isotope Facility
2220 Plant & Env Sci
One Shields Ave
Davis, CA 95616
Phone: (530) 752-8100
FAX: (530) 752-4361
stableisotopefacility.ucdavis.edu
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-----Original Message-----
From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On
Behalf
Of Amzad Hussain
Sent: Monday, April 07, 2008 12:04 PM
To: [log in to unmask]
Subject: [ISOGEOCHEM] stable isotopic measurement of DOC
Hi everyone
I would like to know how CO2 can be extracted from Dissolved
Organic
Carbon for stable isotopic analysis?
Thanks
Amzad
--
*****
Simon Poulson
Research Associate Professor
Dept. of Geological Sciences & Engineering MS-172
University of Nevada - Reno
1664 N. Virginia St.
Reno, NV 89557-0138. USA
(775) 784-1104
Fax: (775) 784-1833
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http://www.mines.unr.edu/isotope/simonhome.html
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