NEN 6644-1983
Water - Calculation of free ammoniac content

Standard No.

NEN 6644-1983

Release Date

1983

Published By

NL-NEN

Latest

NEN 6644-1983

Scope

The standard applies to surface water. The calculation requires the ammonium-nitrogen content (NEN 3235 6.1.1 or 6.1.2 or NEN 6472), the pH (NEN 6411), the temperature and the ionic strength. Free ammonia is toxic to fis .

NEN 6644-1983 history

• 1983 NEN 6644-1983 Water - Calculation of free ammoniac content