Please select and order
€56.10
excl. VAT
Add to cart
Norm
ISO 787-19:1974
Issue date: 1974 05 01
General methods of test for pigments — Part 19: Determination of water-soluble nitrates (Salicylic acid method)
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 sali...
Withdrawn: 2020 04 16
Publisher:
International Organization for Standardization
Format:
Digital | 2 Pages
Language:
English
Currently valid:
ICS
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.
ISO 787-19:2020
2020 04 16
General methods of test for pigments — Part 19: Determination of water-soluble nitrates (Salicylic a...
Norm
ISO 787-19:1974
1974 05 01
General methods of test for pigments — Part 19: Determination of water-soluble nitrates (Salicylic a...
Norm
↖
Norm
Issue date :
2020 04 16
General methods of test for pigments — Part 19: Determination of water-soluble nitrates (Salicylic acid method)
