International Standard
ISO 2865:1973
Aluminium oxide primarily used for the production of aluminium — Determination of boron content — Curcumin spectrophotometric method
Reference number
ISO 2865:1973
Edición 1
1973-12
International Standard
Vista previa
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ISO 2865:1973
7876
No disponible en español
Publicado (Edición 1, 1973)
Esta norma se revisó y confirmó por última vez en 2022. Por lo tanto, esta versión es la actual.

ISO 2865:1973

ISO 2865:1973
7876
Formato
Idioma
CHF 42
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Resumen

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.

Informaciones generales

  •  : Publicado
     : 1973-12
    : Norma Internacional confirmada [90.93]
  •  : 1
     : 5
  • ISO/TC 226
    71.100.10 
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