ISO-2865 › Aluminium oxide primarily used for the production of aluminium -- Determination of boron content -- Curcumin spectrophotometric method

ISO-2865 - 1ST EDITION - CURRENT


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 1ST EDITION - Dec. 15, 1973
 1ST EDITION CORRIGENDUM 1 - July 15, 1991

Applicable to products having boron oxide contents of more than 0.0006 % (m/m). With sufficiently sensitive apparatus, the lower limit of application may be extended to 0.00008 % (m/m). The test portion is dissolved in phosphoric acid. Separation of the boron by distillation as methyl borate. Formation of a red coloured complex between the boron and the curcumin reagent at pH 7. Spectrophotometric measurement of the complex at a wavelength of about 550 nm.

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Document Number

ISO 2865:1973

Revision Level

1ST EDITION

Status

Current

Publication Date

Dec. 15, 1973

Committee Number

ISO TC 47/SC 7