What is your preferred method for processing bulk sediment samples to remove inorganic carbon?
You are going to have some chlorine residue if you use the fumigation method or direct HCl method.
Joanne P Ballard
Quaternary Paleoenvironments & Biogeography
Department of Geography
304 Burchfiel Geography Building
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The University of Tennessee
Knoxville, TN 37996-0925 U.S.A
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From: Stable Isotope Geochemistry <[log in to unmask]> on behalf of Wolfram Meier-Augenstein <[log in to unmask]>
Sent: Friday, September 06, 2013 4:40 AM
To: [log in to unmask]
Subject: [ISOGEOCHEM] FW: [ISOGEOCHEM] Trichlorsilane
I can only re-emphasize waht Claudia has pointed out already. You really do not want to have chlorine in your EA-IRMS system.
In my lab we see exactly the same problems as Claudia has described: failure of combustion reactors (= pin-prick holes in the quartz glass wall with molten tin breaking through); heavy damage to the O-rings on either end of the water trap; ultimately irreversible damage to the GC column; and I shudder to think what it does to the ion source and the pumps.
Impact on the instrument and resulting cost implications aside, to add insult ot injury results are not of the same quality as results of "benign" samples. Though still acceptable they are just not as good as one has grown accustomed to.
"Facts do not cease to exist because they are ignored."
Aldous Huxley, "Proper Studies", 1927
Professor W Meier-Augenstein, PhD, CChem, FRSC
Principal Scientist - Stable Isotopes
Stable Isotope Laboratory
The James Hutton Institute
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From: Stable Isotope Geochemistry [[log in to unmask]] on behalf of Peter Stow [[log in to unmask]]
Sent: 05 September 2013 22:08
To: [log in to unmask]
Subject: [ISOGEOCHEM] Trichlorsilane
We are looking at analysing trichlorsilane using EA. Does anyone have
experience analysing trichlorsilane or related compounds on a combustion
elemental analyser for d13C? And does the higher levels of Cl affect
the combustion column?
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