Active standard | Published: 01/12/1973

ISO 2865:1973

Aluminium oxide primarily used for the production of aluminium — Determination of boron content — Curcumin spectrophotometric method
(Oxyde d´aluminium principalement utilisé pour la production de l´aluminium — Dosage du bore — Méthode spectrophotométrique a la curcumine)

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Detail information

Designation: ISO 2865:1973

Publication date: 01/12/1973

Pages: 5

Country: International technical standard

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Anotation

Description / Abstract: 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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