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Stable Isotope Geochemistry <[log in to unmask]>

Subject:

Sulphur in terrestrial plants and DOM

From:

Karin Guiguer <[log in to unmask]>

Date:

Wed, 12 Jun 2002 10:59:22 -0400

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Stable Isotope Geochemistry <[log in to unmask]>

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Hi all,

I am trying to get 34S from terrestrial plants and estuarine DOM trough the
EA-CFIRMS method. The problem is that the sulphur content is this material
is very low and trying to increase the sample weight above 20mg results in
really bad chromatogram. I look into isolating the organic sulphur as BaSO4
through the Eschka procedure but it seems a bit of time consuming. Does
anyone has ideas on how to concentrate the organic sulphur other than the
Eschka?

I really appreciate any help.

Thanks

Karin
Karin Guiguer, Ph.D.
Biology Department
University of Waterloo,
200 University Ave. W.
Waterloo, ON, Canada, N2L 3G1
(tel) 519-888-4567 ext 2073

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