> Carol,

I am experimenting with methodology for determining NO3- d18O in marine waters
and need to standardize my results to check for isotopic exchange, etc.  I have
USGS32 and IAEA N3 nitrate standards.  Have you determined the d18O for these.

Best regards,
Mark

PS  Please send recent reprints relating to this topic.


--
Mark A. Altabet
CMAST
U. Mass. Dartmouth
706 Rodney French Blvd.
New Bedford, MA 02744-1221

Tel:  (508) 999-8622
Fax:  (508) 999-8197