Dear Davis,
Probably the most useful for you would be this:
S.R. Silva, C. Kendall, D.H. Wilkison, A.C. Ziegler, C.C.Y. Chang, R.J. 
Avanzino, 2000, A new method for collection of nitrate from fresh water 
and the analysis of nitrogen and oxygen isotope ratios. Journal of 
Hydrology 228: 22--36

best regards

Greg

-------------------------------------------------------------
Dr Grzegorz Skrzypek, Research Fellow

West Australian Biogeochemistry Centre
John de Laeter Centre of Mass Spectrometry
School of Plant Biology, The University of Western Australia
35 Stirling Highway (MO90), Crawley WA 6009, Australia

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davis deljo wrote:
> Dear members
> i am working in the research problem of impact of sewage network on 
> groundwater.
> any body having the methdology of seperation of 15N through ion 
> exchange resins,
> where it will be available?
> Any information regarding this plz pass to my mail id 
> ([log in to unmask])
>
> Deljo Davis
> Senior Research Fellow
> Department of Environmental Sciences
> J.B. Campus
> Bangalore University
> Bangalore 560 056
> +91 9901503685
>
>
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