ISO 3122:1976
$12.35
Boric acid, boric oxide, disodium tetraborates, sodium perborates and crude borates for industrial use — Determination of iron content — 2,2′- Bipyridyl photometric method
| Published By | Publication Date | Number of Pages |
| ISO | 1976-04 | 6 |
Preliminary reduction of the iron(III) by hydroxylammonium chloride, if required, suppression of the interference of tin by oxalic acid. Formation of the coloured iron(III)-2,2'-dipyridyl complex in a buffered medium. Photometric measurement of the coloured complex at a wavelength of about 522 nm.
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