Norm

NEN-EN-ISO 787-19:1995 en

Algemene beproevingsmethoden voor pigmenten en vulstoffen - Deel 19: Bepaling van in water oplosbare nitraten (Methode met salicylzuur)

31,57

Over deze norm

Status Definitief
Aantal pagina's 2
Commissie Verfwaren
Gepubliceerd op 01-09-1995
Taal Engels
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 salicyclic 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.

Details

ICS-code 87.060.10
Nederlandse titel Algemene beproevingsmethoden voor pigmenten en vulstoffen - Deel 19: Bepaling van in water oplosbare nitraten (Methode met salicylzuur)
Engelse titel General methods of tests for pigments and extenders - Part 19: Determination of water-soluble nitrates (Salicyclic acid method)

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