Dachun,

      You can use it but if you plan to run it as a dry salt you need to
give the nitrate some cation other than H+ to avoid the volatility of HNO3.
We did this by adding silver oxide, but for d15N only you could probably
use other oxides or possibly a base.  --  Steve


Steven Silva
U.S. Geological Survey
345 Middlefield Rd., Mailstop 434
Menlo Park, CA 94025
ph:  (650) 329-4558
fax: (650) 329-5590
email: [log in to unmask]





                      Dachun Zhang
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                      04/12/2005 04:23
                      PM
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                      Stable Isotope
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Dear All:

Can the solution passed through the AG 50W-X8 resin be used for d15N of
nitrate?

Cheers.

Dachun Zhang
Zymax Isotope Lab