Hi, Everyone
We
are currently working on some carbonate samples
containing a relatively high S content. Thus the CO2 we
extracted through phosporic acid digestion ends up with a very
annoying S contamination, which was confirmed by the mass scan of the sample. At
this moment, the exact nature of the contaminant hasn't been identified,
presumably H2S or SO2. We have already tried several
purification methods, including cryogenic separation, reacting
with silver wire, GC separation etc. So far, the results are
not satisfactory. I wonder whether anyone can give me some
more hints on this problem. (The sample size we are dealing with is usually
around 60 micromoles.)
Any suggestions and comments
from you will be highly appreciated.
Regards
Weifu