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ISO 2829:1973

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

Dec 1, 1973

General information

90.93     Jan 4, 2022

ISO

ISO/TC 226

International Standard

71.100.10  

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Published

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Scope

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.

Life cycle

NOW

PUBLISHED
ISO 2829:1973
90.93 Standard confirmed
Jan 4, 2022

National adoptions

SRPS H.B8.611:1979  
ISS

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

95.99   Withdrawal of Standard

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