ISO 1694:1976

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Cryolite, natural and artificial — Determination of iron content — 1,10- Phenanthroline photometric method

Published By	Publication Date	Number of Pages
ISO	1976-09	7

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Categories: 71.060.50 - Salts, ISO

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Description

Applies for the determination of natural and synthetic materials having a molar ratio sodium fluoride/aluminium trifluoride between 3 and 1,7 approximately. The method is applicable to products having an iron content equal to or greater than 0,020 % (m/m). The principle consists in dissolution of a test portion by either alkaline or acid fusion. Reduction of iron(III) with hydroxylammonium chloride, formation of the complex iron(II)-1, 10-phenathroline in a buffered medium at pH value between 3,5 and 4,2. Photometric measurement of the coloured complex at a wavelength of about 510 nm. Applies ISO Recommendation R 1694-1970.

Additional information

Published Code	ISO
Published By	International Organization for Standardization
Publication Date	1976-09
Pages Count	7
Language	English
Edition	1
File Size	419.8 KB
ICS Codes	71.060.50 - Salts

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ISO 1694:1976

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