Hi All,

I've read in the ISOGEOCHEM archives that the Platinum catalyst used  
in D/H analyses of H2O by equilibration can be "poisoned" by dissolved  
sulfides.  Does anyone have experience to estimate a sulfide  
concentration above which this effect should be considered  
significant?  I've also read about pre-treatment with copper to avoid  
this problem.  Does anyone have a reference or advice for a standard  
pre-treatment?

Thanks,

Jonathan Wynn
Department of Geology
University of South Florida
4202 E Fowler Ave, SCA 528
Tampa, FL 33620
Tel.  +1 (813) 974-9369
Lab. +1 (813) 974-5278
Fax. +1 (813) 974-2654
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http://shell.cas.usf.edu/~jwynn