We have the capability to analyze both N-15 and O-18 in NO3 and NO2 in a
single aliquot of samle.  We published our method: Revesz and others,
Determination of delta O-18 and delta N-15 in nitrate, Analytical Chemistry,
1997, V.69, Number 21, pg. 4375-4380.

We have been applying this method successfully in the last couple of years.

Contact me if you think I can be any help:


 Kinga



 >I am proposing a small feasibility study in SE New Mexico that will consider
>15N and 18O in NO3.  To date I have had difficulty locating labs able to do
>the analyses.  The project will involve a pilot study of about 12 samples.
>The project is to be sponsored by both governmental and non-profit agencies.
>If successful, the program will be expanded to cover more area, although it
>will never become a work burden or a significant revenue source for a lab!
>
>I can be pretty loose on turn-around time, but would like to be able to show
>the sponsors a couple alternatives on labs.  If your facility would be able
>to accomodate such a study after January 1998, I would appreciate hearing
>from you -- either directly or through the list.
>
>Thanks
>/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X
>/X/X/X/X/X/X/X/X
>Kay Havenor, Ph.D., PG, CPG
>Geoscience Technologies
>904 Moore
>Roswell, NM 88201
>505-624-7136
>
>
>*****Learning is the best part of discovery"""""
>/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X/X
>/X/X/X/X/X/X/X/X
>
>
Kinga Revesz
Water Resources Division
U.S.Geological Survey
431 National Center
Reston, VA. 22092
T: 703-648-5865
Fax: 703 648-5274
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