Ammonium sulphate for industrial use — Determination of iron content — 2,2´- Bipyridyl photometric method
NORM herausgegeben am 1.4.1974
Designation standards: ISO 2992:1974
Publication date standards: 1.4.1974
The number of pages: 3
Approximate weight : 9 g (0.02 lbs)
Country: International technical standard
Kategorie: Technische Normen ISO
Description / Abstract: 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.