ISO 2865-1973 主要用于铝生产的氧化铝 硼含量的测定 姜黄素分光光度法

标准号：ISO 2865-1973
中文标准名称：主要用于铝生产的氧化铝 硼含量的测定 姜黄素分光光度法
英文标准名称：Aluminium oxide primarily used for the production of aluminium; Determination of boron content; Curcumin spectrophotometric method
标准类型：G10
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G10
国际标准分类号：71.100.10
适用范围：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.