721326

ISO 9061:1993

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

standard by International Organization for Standardization , 04/01/1993

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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).

 

Product Details

Published:
04/01/1993
Number of Pages:
4
File Size:
1 file , 350 KB
Note:
This product is unavailable in Ukraine, Russia, Belarus