ISO-6374 › Cryolite, natural and artificial, and aluminium fluoride for industrial use -- Determination of phosphorus content -- Atomic absorption spectrometric method after extraction

ISO-6374 - 1ST EDITION - CURRENT


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Specifies a method based on the fusion of a test portion with sodium carbonate and boric acid and dissolution in perchloric acid solution, followed by formation of the ammonium molybdophosphate complex and extraction of the complex with isobutyl acetate. The solution is absorbed into an acetylene/dinitrogen monoxide flame and the molybdenum, and hence the phosphorus, is determined by measuring the absorbance of the 379,8 nm line emitted by a molybdenum hollow-cathode lamp.

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Document Number

ISO 6374:1981

Revision Level

1ST EDITION

Status

Current

Publication Date

Oct. 15, 1981

Committee Number

ISO TC 47/SC 7