717429

ISO 3429:1976

Sodium fluoride primarily used for the production of aluminium -- Determination of iron content -- 1,10- Phenanthroline photometric method

standard by International Organization for Standardization , 07/01/1976

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Full Description

Applicable to the determination of Fe contents, expressed as Fe2 O3 , of more than 0.020 % (m/m). Covers the dissolution of a test portion by alkaline fusion by means of sodium carbonate and boric acid. Dissolving of the residue with nitric acid solution and reduction of iron(III) by means of hydroxylammonium chloride. Formation of the iron(II)-1,10-phenanthroline complex in a buffered medium at a pH between 3.5 and 4.2. Photometric measurement of the coloured complex at a wavelength of about 510 nm.

 

Product Details

Published:
07/01/1976
Number of Pages:
4
File Size:
1 file , 370 KB
Same As:
BS 5072-5:1980
Note:
This product is unavailable in Ukraine, Russia, Belarus