ISO 2829-1973 主要用于铝生产的氧化铝 磷含量的测定 还原磷钼酸盐分光光度法

标准号：ISO 2829-1973
中文标准名称：主要用于铝生产的氧化铝 磷含量的测定 还原磷钼酸盐分光光度法
英文标准名称：Aluminium oxide primarily used for the production of aluminium; Determination of phosphorus content; Reduced phosphomolybdate 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 phosphorus contents of more than 0.0005 % (m/m). Preparation of a solution from a test portion by alkaline fusion either with a mixture of sodium carbonate and borid or of sodium carbonate and sodium tetraborate. Dissolution of the cooled molten mass in nitric acid and adjustment of an appropriate aliquot portion to pH 2. Formation of a phosphomolybdic complex and extraction by 2-methylpropan-1-ol in a sulphuric acid medium. Reduction of the complex by thin(II) chloride in the organic phase and spectrophotometric measurement of the reduced complex at a wavelength of about 730 nm. Has also been approved by the IUPAC.