ISO 1618-1976 主要用于铝生产的氧化铝 钒含量的测定 N-苯甲酰-N-苯胲光度法

标准号：ISO 1618-1976
中文标准名称：主要用于铝生产的氧化铝 钒含量的测定 N-苯甲酰-N-苯胲光度法
英文标准名称：Aluminium oxide primarily used for the production of aluminium; Determination of vanadium content; N-Benzoyl-N-phenylhydroxylamine photometric 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：The method is applicable to products having vanadium contents between 0,0003 % (m/m) and 0,016 % (m/m), provided that the content of chromic oxide and titanic oxide does not exceed 0,002 % (m/m) and 0,006 % (m/m), respectively. The principle consists in a previous oxidation of the vanadium contained in the test sample to vanadium(V) by patassium permanganate in sulphuric acid solution. Formation of the vanadium-N-benzoyl-N-phenylhydroxylamine complex. Extraction of the violet coloured complex with chloroform in hydrochloric acid; solution. Photometric measurement of the coloured complex at a wavelength of about 524 nm.