At 03:43 AM 5/11/96 -0400, you wrote:
>I'm attempting to analyze 13C in carbonates hosted in a massive sulfide
>deposit.  In many samples it is very difficult to collect carbonate without
>getting a little sulfide mixed in.  Does anyone know how pyrrhotite (or any
>other sulfide) reacts with phosphoric acid?  A reliable method for
>separating any potential hydrogen sulfide from the collected CO2?  Any
>suggestions or references would be appreciated.
>
>Thanks in advance.
>
>Hiram
>
>------------------------------------------------------------------------------
>------------------------------------------------------------------------------
>Hiram Jackson                                   [log in to unmask]
>Dept. of Geology
>University of California
>Davis, CA  95616
>

H2S can be absorbed in a Ag3PO4 trap at 150 degrees C and hence separated
from CO2.

Dachun Zhang
Stable Isotope Lab Manager
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