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SRPS EN ISO 787-19:2010

General methods of test for pigments - Part 19: Determination of water-soluble nitrates (Salicyclic acid method) (ISO 787-19:1974)

Jun 30, 2010
95.99   Withdrawal of Standard   May 29, 2020

General information

95.99     May 29, 2020

ISS

H035

European Norm

87.060.10  

English  

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Scope

This document specifies a spectrophotometric method. The principle of the method consists in that the nitrate present in the extract of the sample is used to nitrate salicylic acid in sulphuric acid medium. The nitro-compound formed is of an intense yellow colour in alkaline solution and the colour is measured spectrophotometrically at a wavelength of 410 nm. ISO 787/13 specifies a method using Nessler's reagent. The two methods may not necessarily give the same result; work is being carried out to compare the two methods.

Life cycle

NOW

WITHDRAWN
SRPS EN ISO 787-19:2010
95.99 Withdrawal of Standard
May 29, 2020

Related project

Adopted from EN ISO 787-19:1995

Adopted from ISO 787-19:1974