EN ISO 787-19:1995
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
View Superseded by
General methods of test for pigments - Part 19: Determination of water-soluble nitrates (Salicyclic acid method) (ISO 787-19:1974)
09-05-2020
23-08-1995
FOREWORD
0 INTRODUCTION
1 SCOPE AND FIELD OF APPLICATION
2 REFERENCE
3 PRINCIPLE
4 REAGENTS
5 APPARATUS
6 SAMPLING
7 PREPARATION OF CALIBRATION GRAPH
8 PROCEDURE
9 EXPRESSION OF RESULTS
10 TEST REPORT
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 |
CEN/TC 298
|
| DocumentType |
Standard
|
| PublisherName |
Comite Europeen de Normalisation
|
| Status |
Superseded
|
| SupersededBy |
| Standards | Relationship |
| ONORM EN ISO 787-19 : 1995 | Identical |
| ISO 787-19:1974 | Identical |
| NF EN ISO 787-19 : 1995 | Identical |
| BS 3483-C9(1995) : 1995 | Identical |
| SS-EN ISO 787-19 : 1995 | Identical |
| UNI EN ISO 787-19 : 1998 | 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 |
| PN EN ISO 787-19 : 1999 | Identical |
| UNE-EN ISO 787-19:1996 | Identical |
| SN EN ISO 787-19 : 1996 | Identical |
| I.S. EN ISO 787-19:1996 | Identical |
| DIN EN ISO 787-19:1995-10 | Identical |
| ISO 842:1984 | Raw materials for paints and varnishes Sampling |
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