Withdrawn
, Reaffirmed
Standard
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ISO 2992:1974 (R2019)
Ammonium sulphate for industrial use — Determination of iron content — 2,2'- Bipyridyl photometric method
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Summary
Applicable to Fe contents of equal to or more than 0.0001 % (m/m). The reaction bases on the reduction of iron(III) by hydroxylammonium chloride. Formation of the complex between iron(II) and 2,2'-dipyridyl in a buffered medium (pH value between 4.5 and 6). Photometric measurement of the coloured complex at a wavelength of about 522 nm. Has also been approved by the IUPAC.
Notes
90.60 : Clôture de l'examen
Technical characteristics
| Publisher | International Organization for Standardization (ISO) |
| Publication Date | 04/01/1974 |
| Confirmation Date | 07/19/2019 |
| Edition | 1 |
| Page Count | 3 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
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Previous versions
01/04/1974
Withdrawn
, Reaffirmed
Most Recent