ISO 983:1974
$11.05
Sodium hydroxide for industrial use — Determination of iron content — 1,10- Phenanthroline photometric method
| Published By | Publication Date | Number of Pages |
| ISO | 1974-12 | 4 |
Specifies a method that is more sensitive and more widely used than the 2,2'-bipyridyl method. It is applicable to products having iron contents equal to or greater than 0.5 mg/kg. The principle is based on the reduction of trivalent iron by hydroxylammonium chloride, formation of a bivalent iron/1,10-phenanthroline complex in a buffered system. Photometric measurement of the coloured complex at a wavelength of about 510 nm. This method has also been approved by the IUPAC. – Cancels and replaces ISO Recommendation R 983-1969.
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