Abstract
The principle of the method specified is to decompose a test portion by a mixture of nitric, hydrofluoric and perchloric acids, dissolving the salts in hydrochloric acid after evaporation to fumes of sulfuric acid, extracting the antimony from a dilute hydrochloric acid solution of the decomposed test portion into a solution of tri-n-octylphosphine oxide in 4-methyl-2-pentanone, aspirating the extract into the air/acetylene flame of an atomic absorption spectrometer, and measuring the absorbance at 217,6 nm. Applies to products having an antimony content equal to or greater than 0,001 % (m/m).
General information
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Status : WithdrawnPublication date : 1993-04
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Edition : 2Number of pages : 7
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Technical Committee:ISO/TC 175Fluorspar
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- ICS :
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Non-metalliferous minerals
Life cycle
A standard is reviewed every 5 years
Revisions / Corrigenda
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Previously
ISO 9504:1990
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Now withdrawn
ISO 9504:1993
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