Determination of nitrate in sea water |
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| Authors: | Tsaihwa J Chow MS Johnstone |
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| Institution: | Scripps Institution of Oceanography, University of California, La Jolla, CaliforniaU.S.A. |
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| Abstract: | Nitrate in sea water is determined by reduction to nitrite with zinc metal in ammoniacal solution in the presence of manganese (IV) as catalyst. The effects of hydrogen ion concentration, reduction temperature, reaction time and the order of reagent addition are discussed. The nascent nitrite diazotizes with sulfanilamide and is then coupled by N-1-naphthylethylenediamine in acid medium forming a diazo-dye which is measured spectrophotometrically. |
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