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RS ISO 11905-1: 1997
Water quality — Determination of nitrogen — Part 1: Method using oxidative digestion with peroxodisulfate

Abstract

This part of IS0 11905 specifies a method for the determination of nitrogen present in water, in the form of free
ammonia, ammonium, nitrite, nitrate and organic nitrogen compounds capable of conversion to nitrate under
the oxidative conditions described.
Dissolved nitrogen gas is not determined by this method.
This method is applicable to the analysis of natural fresh water, sea water, drinking water, surface water and
treated sewage effluent. It is also applicable to the analysis of sewage and trade wastes in which the amount of
organic matter in the test portion can be kept below 40 mg/l, expressed as carbon (C), when measured by Total
Organic Carbon (TOC), or I20 mg/l, expressed as oxygen (O,), when measured by Chemical Oxygen Demand
(COD) according to the respective International Standards.

General Information

Code	Classification	Theme	Pages	Publisher	Availability
RS ISO 11905-1: 1997	ADOPTED ISO STANDARDS	Environment. Health protection. Safety	21	First Edition Oct 2022	Available

Price: RWF 19,500

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