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ISO 5663:1984
Water quality - Determination of Kjeldahl nitrogen - Method after mineralization with selenium
Specifies a procedure for the determination of trivalent negative nitrogen. Organic nitrogen in the form of azide, azine, azo, hydrazone, nitrite, nitro, nitroso, oxime or semicarbazone is not determined quantitatively. The procedure is applicable to the analysis of raw, potable and waste waters.
International Organization for Standardization [iso]

