ISO 5663:1984 Preview
Water quality -- Determination of Kjeldahl nitrogen -- Method after mineralization with selenium
This standard was last reviewed and confirmed in 2017. Therefore this version remains current.
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.
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