DS/EN 25663:1994
Water quality-Determination of Kjeldahl nitrogen-Method after mineralization with selenium

Standard No.

DS/EN 25663:1994

Release Date

1994

Published By

Danish Standards Foundation

Latest

DS/EN 25663:1994

Scope

This International Standard specifies a method for the deter-mination of nitrogen by a Kjeldahl-type method. Only trivalent negative nitrogen is determined. Organic nitrogen in the form of azide, azine, azo, hydrazone, nitrite, nitro, nitroso, oxime or semicarbazone is not determined quantitatively. Nitrogen may be incompletely recovered from heterocyclic nitrogen com-pounds.

DS/EN 25663:1994 history

• 1994 DS/EN 25663:1994 Water quality-Determination of Kjeldahl nitrogen-Method after mineralization with selenium