Determination of nitrate in sea water by cadmium-copper reduction to nitrite
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; e-ISSN 1469-7769, more
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| Authors | | Top |
- Wood, E.D.
- Armstrong, F.A.J.
- Richards, F.A.
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| 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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