ISO 3946:1982

Published (Edition 1, 1982)

This publication was last reviewed and confirmed in 2019. Therefore this version remains current.

ISO 3946:1982

CHF 42

Convert Swiss francs (CHF) to your currency

Abstract

Destruction of the organic substances by digestion with a sulpho-nitric mixture and conversion of phosphates to orthophosphates. Formation of a phosphomolybdate. Measurement of the intensity of the blue colour at a wavelength of 825 nm. The method applies to contents up to 5 % (m/m).