ISO 2828-1973 主要用于铝生产的氧化铝 氟含量的测定 茜素配位酮和氯化镧分光光度法

标准号：ISO 2828-1973
中文标准名称：主要用于铝生产的氧化铝 氟含量的测定 茜素配位酮和氯化镧分光光度法
英文标准名称：Aluminium oxide primarily used for the production of aluminium; Determination of fluorine content; Alizarin complexone and lanthanum chloride 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 F contents of more than 0.003 % (m/m). Dissolution of a test portion by attack by sulphuric acid under pressure. Separation of the fluorine by distillation at a temperature of (150 1) 鳦 by sulphuric acid. The distillation is carried out by the method described in ISO 1693. Formation of a blue coloured complex between fluorine and alizarin complexone/lanthanum chloride reagent at a pH between 4.5 and 4.6. Addition of acetone to increase the stability and sensitivity of the fluorine complex. Spectrophotometric measurement of the complex at a wavelength of about 620 nm. Has also been approved by the IUPAC.