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Determination of nitrate in sea water by cadmium-copper reduction to nitrite
Wood, E.D.; Armstrong, F.A.J.; Richards, F.A. (1967). Determination of nitrate in sea water by cadmium-copper reduction to nitrite. J. Mar. Biol. Ass. U.K. 47(1): 23-31. hdl.handle.net/10.1017/S002531540003352X
In: Journal of the Marine Biological Association of the United Kingdom. Cambridge University Press/Marine Biological Association of the United Kingdom: Cambridge. ISSN 0025-3154, more
Peer reviewed article  

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  • Wood, E.D.
  • Armstrong, F.A.J.
  • Richards, F.A.

Abstract
    An accurate, dependable determination of 0–60 µg-at./l. of NO-3-N in sea water has been developed. The sample is treated with tetrasodium ethylenediaminetetraacetate solution and passed through a column of copperized cadmium filings. A nearly quantitative reduction of nitrate to nitrite results. Nitrite is then determined by a diazotization method. Neither sulphide nor high nitrite concentrations interferes. Approximately eight samples per hour per column can be analysed with a standard deviation of 0.12 µg-at./l. at the 20 µg-at./l. level.

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