ISO 787-19:1974
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
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General methods of test for pigments Part 19: Determination of water-soluble nitrates (Salicylic acid method)
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
18-04-2020
English, French
01-05-1974
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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.
| DocumentType |
Standard
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| Pages |
2
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| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
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| SupersededBy |
| Standards | Relationship |
| ONORM EN ISO 787-19 : 1995 | 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 |
| DIN ISO 787-19:1984-04 | Identical |
| PN EN ISO 787-19 : 1999 | Identical |
| UNE-EN ISO 787-19:1996 | Identical |
| SN EN ISO 787-19 : 1996 | Identical |
| EN ISO 787-19:1995 | Identical |
| I.S. EN ISO 787-19:1996 | Identical |
| DIN EN ISO 787-19:1995-10 | Identical |
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