標(biāo)準(zhǔn)號：ISO 2829-1973
中文標(biāo)準(zhǔn)名稱：主要用于鋁生產(chǎn)的氧化鋁 磷含量的測定 還原磷鉬酸鹽分光光度法
英文標(biāo)準(zhǔn)名稱：Aluminium oxide primarily used for the production of aluminium; Determination of phosphorus content; Reduced phosphomolybdate spectrophotometric method
標(biāo)準(zhǔn)類型：G10
發(fā)布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標(biāo)準(zhǔn)分類號：G10
國際標(biāo)準(zhǔn)分類號：71.100.10
適用范圍：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.