ISO/R 1982:1971
Withdrawn
Nitric acid for industrial use — Determination of iron content — 2,2'- Bipyridyl photometric method
Hardcopy , PDF
English, French
05-01-1971
05-10-2019
The method is applicable to the determination of iron contents greater than 0,0001 % (m/m). The principle consists in evaporation of a test portion, taking up by means of hydrochloric acid and reduction of iron(III) by means of hydroxylammonium chloride. Formation of iron(II)-2,2' -dipyridyl complex in ammonium acetate medium. Photometric measurement of the coloured complex at a wavelength of about 522 nm.
| Committee |
ISO/TC 47
|
| DocumentType |
Standard
|
| Pages |
4
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| Standards | Relationship |
| BS 4367:1968 | Similar to |
| NBN T 03 038 : 1979 | Identical |
| NFT 20 253 : 1968 | Similar to |
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