ISO 5443:1978
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Sodium hexafluorosilicate for industrial use Determination of iron content 1,10 phenanthroline spectrophotometric method
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
05-03-2019
English, French
01-11-1978
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Applicable to products having Fe contents between 0.0004 % (m/m) and 0.1 % (m/m). The residue from the determination of the loss of mass according to ISO 5444 is used to prepare the test sample. Decomposition of the hexafluorosilicate and elimination of silica by evaporation with hydrofluoric and sulphuric acids. Dissolution of the residue in hydrochloric acid and reduction of the iron(III) with hydroxylammonium chloride. Formation of a complex between iron(II) and 1,10-phenanthroline in a buffered medium, spectrophotometric measurement of the coloured complex at a wavelength of about 510 nm. Has also been approved by the IUPAC.
| DocumentType |
Standard
|
| Pages |
4
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| Standards | Relationship |
| BS 5705-3:1979 | Identical |
| NBN T 03 529 : 1983 | Identical |
| NFT 20 531 : 84 FD | Identical |
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