Standard

NS-EN ISO 787-19:1995

Oct 1995 Withdrawn

Note: This standard has a new edition: NS-EN ISO 787-19:2020

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Abstract

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.

Document information

Standard from SN
Published: 3 October 1995
Withdrawn: 2 June 2020
Edition: 1995-08
Version: 1
Document type: NAT
ISBN:

ICS 87.060.10
National Committee SN/K 51

Product Relations

Replaced by: NS-EN ISO 787-19:2020
Adopted from: EN ISO 787-19:1995 , 0

Product life cycle

Current product

Withdrawn

NS-EN ISO 787-19:1995
Replaced by

Published

NS-EN ISO 787-19:2020

NS-EN ISO 787-19:1995

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NS-EN ISO 787-19:2020