Approved Work Item
ISO/AWI 5663
Water quality — Determination of Kjeldahl nitrogen — Method after mineralization with selenium
Reference number
ISO/AWI 5663
Edition 2
© ISO 2025
Approved Work Item
Under development
A working group has prepared a draft.
Will replace ISO 5663:1984

Abstract

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.

General information

  • Status
     : Under development
    Stage
    : New project registered in TC/SC work programme [20.00]
  • Edition
     : 2
  • Technical Committee :
    ISO/TC 147/SC 2
  • RSS updates

Life cycle

Sustainable Development Goals

This standard contributes to the following Sustainable Development Goals

6
Clean Water and Sanitation
12
Responsible Consumption and Production

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