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

Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English, French

Published date

10-01-1981

Publisher

International Organization for Standardization

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.

Committee	ISO/TC 226
DevelopmentNote	Also numbered as BS 4993-10(1983) and BS 5050-13(1988). (07/2005)
DocumentType	Standard
Pages	4
PublisherName	International Organization for Standardization
Status	Current

Standards	Relationship
NBN T 03 450 : 1983	Identical
NFT 20 161 : 84 FD	Identical

ISO/TR 4277:2009	Cryolite, natural and artificial Conventional test for evaluation of free fluorides content
PD ISO/TR 4277:2009	Cryolite, natural and artificial. Conventional test for evaluation of free fluorides content