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Hlavní stránka>ISO 2865:1973-Aluminium oxide primarily used for the production of aluminium — Determination of boron content — Curcumin spectrophotometric method
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sklademVydáno: 1973
ISO 2865:1973-Aluminium oxide primarily used for the production of aluminium — Determination of boron content — Curcumin spectrophotometric method

ISO 2865:1973

ISO 2865:1973-Aluminium oxide primarily used for the production of aluminium — Determination of boron content — Curcumin spectrophotometric method

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Anglicky PDF
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1200 Kč
Francouzsky PDF
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1200 Kč
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1200 Kč
Francouzsky Tisk
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1200 Kč
Označení normy:ISO 2865:1973
Počet stran:5
Vydání:1
Vydáno:1973
Popis

ISO 2865:1973


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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