We put in some pure copper (take what you find in your lab; I prefer
some fine grained but other people use old electric wires cut into
pieces...) to remove potential S and usually wait over night or so.
Check the color of the copper. If it turns not black anymore the S
should be removed. Otherwise add some more copper.
On 16.07.2010 02:39, Fred Leaney wrote:
> Dear ISOGEOCHEMers,
> We are currently receiving more and more water samples that contain either sulfide and/or organics for D and O-18 analysis because of an increased focus on groundwater/surface water interaction studies. This tends to cause problems when analysing for D using H2 equilibration because of poisoning of the Pt catalyst and also when using our LGR. Does anyone have suggestions as to how to treat the samples before analysis. I am assuming that we may be able to preciptate the S using either Zinc Acetate or silver wire but would appreciate advice from anyone who has had success with similar problem samples.
> Thanks again,
> Fred Leaney
> CSIRO Isotope Analysis Lab, Adelaide, Australia
Dr. Robert van Geldern
GeoZentrum Nordbayern / Applied Geosciences
University of Erlangen-Nuremberg
91054 Erlangen, Germany
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