Nitrate and Organic N Analyses with Second-Derivative Spectroscopy

Date
1992-06-01
Authors
Crumpton, William
Isenhart, Thomas
Mitchell, Paul
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Botany
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Abstract

Simple and reliable procedures have been developed for analyses of N03 , total N, and organic N in fresh waters. N03- is determined by second-derivative UV spectroscopy. Total N and organic N are determined based on secondderivative analyses of N03- following persulfate digestion. Resolution of organic N determinations was increased by using ion-exchange resins to remove N03- from samples with high concentrations of N03 prior to persulfate oxidation of the organic N.

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This article is from Limnology and Oceanography 37 (1992): 907, doi:10.4319/lo.1992.37.4.0907. Posted with permission.

Keywords
photo-oxidation, spectroscopy, nitrogen, agricultural watershed
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