ISO 2362:1972
Withdrawn
Aluminium fluoride for industrial use — Determination of fluorine content — Modified Willard-Winter method
Hardcopy , PDF
English, French
12-01-1972
05-29-2019
The principle of the method consists in fusion of a test portion with sodium carbonate. Separation of fluorine by distillation with sulphuric acid. Titration with thorium nitrate solution using sodium alizarinsulphonate-methylene blue as indicator. Alternatively, the thorium nitrate titration may be made using only sodium alizarinsulphonate; the end-point being spectrophotometrically determined at 525 nm.
| Committee |
ISO/TC 47
|
| DocumentType |
Standard
|
| Pages |
5
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| Standards | Relationship |
| NBN T 03 435 : 1983 | Identical |
| BS 4993-1:1974 | Similar to |
| NFT 20 161 : 84 FD | Identical |
| BS 6445-1:1983 | Hexafluorosilicic acid for industrial use. Method for determination of available fluorine content (potentiometric method after distillation) |
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