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Ion-exchange method in the collection of nitrate from freshwater ecosystems for nitrogen and oxygen isotope analysis: a review

Environmental Science and Pollution Research, ISSN: 1614-7499, Vol: 22, Issue: 13, Page: 9575-9588
2015
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Article Description

Nitrate (NO) contamination of freshwater is considered one of the most prevalent global environmental problems. Dual stable isotopic compositions (δN and δO) of NO can provide helpful information and have been well documented as being a powerful tool to track the source of NO in freshwater ecosystems. The ion-exchange method is a reliable and precise technique for measuring the δN and δO of NO and has been widely employed to collect NO from freshwater ecosystems. This review summarizes and presents the principles, affecting factors and corresponding significant improvements of the ion-exchange method. Finally, potential improvements and perspectives for the applicability of this method are also discussed, as are suggestions for further research and development drawn from the overall conclusions.

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