90.93 Standard confirmed May 21, 2008
CEN
CEN/TC 230 Water analysis
European Norm
13.060.30 Sewage water
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.
PUBLISHED
EN 25663:1993
90.93
Standard confirmed
May 21, 2008