ISO 9061:1993

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Acid-grade and ceramic-grade fluorspar — Determination of iron content — 1,10-Phenanthroline spectrometric method

Published By	Publication Date	Number of Pages
ISO	1993-03	7

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Categories: 73.080 - Non-metalliferous minerals, ISO

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Description

The method specified is based on alkaline fusion of a test portion with a mixture of sodium carbonate and boric acid, dissolution of the melt in excess hydrochloric acid, reduction of the iron(III) with hydroxylammonium chloride, formation of the iron(II)-1,10-phenanthroline complex in a buffered medium (pH between 3 and 5), spectrometric measurement of the absorbance of the coloured complex at a wavelength of about 510 nm, corresponding to the absorption maximum. Applies to products having iron contents, expressed as Fe₂O₃, in the range 0,1 % (m/m) to 2,0 % (m/m).

Additional information

Published Code	ISO
Published By	International Organization for Standardization
Publication Date	1993-03
Pages Count	7
Language	English
Edition	2
File Size	317.4 KB
ICS Codes	73.080 - Non-metalliferous minerals

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ISO 9061:1993

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