Aluminium oxide primarily used for the production of aluminium — Determination of phosphorus content — Reduced phosphomolybdate spectrophotometric method

Available format(s)

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

Language(s)

English, French

Published date

12-01-1973

Publisher

International Organization for Standardization

Applicable to products having phosphorus contents of more than 0.0005 % (m/m). Preparation of a solution from a test portion by alkaline fusion either with a mixture of sodium carbonate and borid or of sodium carbonate and sodium tetraborate. Dissolution of the cooled molten mass in nitric acid and adjustment of an appropriate aliquot portion to pH 2. Formation of a phosphomolybdic complex and extraction by 2-methylpropan-1-ol in a sulphuric acid medium. Reduction of the complex by thin(II) chloride in the organic phase and spectrophotometric measurement of the reduced complex at a wavelength of about 730 nm. Has also been approved by the IUPAC.

DevelopmentNote	Also numbered as BS 4140-18(1986) (07/2005)
DocumentType	Standard
Pages	3
ProductNote	This standard also referes to ISO/R 804
PublisherName	International Organization for Standardization
Status	Current

Standards	Relationship
NBN T 03 419 : 1983	Identical

BS 4140-8:1986	Methods of test for aluminium oxide Determination of absolute density using a pyknometer
BS 4140-9:1986	Methods of test for aluminium oxide Measurement of the angle of repose
BS 4140-13:1986	Methods of test for aluminium oxide Preparation of sample solution by treatment with hydrochloric acid under pressure
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BS 4140-4:1986	Methods of test for aluminium oxide Preparation of sample solution by alkaline fusion
BS 4140-1:1986	Methods of test for aluminium oxide Preparation and storage of test samples
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BS 4140-22:1980	Methods of test for aluminium oxide Determination of manganese content
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BS 4140-12:1986	Methods of test for aluminium oxide Determination of vanadium content
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