ISO 787-19:1974
Withdrawn
View Superseded by
General methods of test for pigments — Part 19: Determination of water-soluble nitrates (Salicylic acid method)
Hardcopy , PDF
English, French
05-01-1974
04-09-2025
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.
| Committee |
ISO/TC 256
|
| DocumentType |
Standard
|
| Pages |
2
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| SupersededBy |
| Standards | Relationship |
| NF EN ISO 787-19 : 1995 | Identical |
| BS 3483-C9(1995) : 1995 | Identical |
| SS-EN ISO 787-19 : 1995 | Identical |
| BS EN ISO 787-19:1995 | Identical |
| NBN EN ISO 787-19 : 1995 | Identical |
| NS EN ISO 787-19 : 1ED 1995 | Identical |
| NEN EN ISO 787-19 : 1995 | Identical |
| DIN ISO 787-19:1984-04 | Identical |
| PN EN ISO 787-19 : 1999 | Identical |
| EN ISO 787-19:1995 | Identical |
| I.S. EN ISO 787-19:1996 | Identical |
| UNE-EN ISO 787-19:1996 | Identical |
| DIN EN ISO 787-19:1995-10 | Identical |
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