ISO 1618:1976 主要用于制铝的氧化铝.钒含量的测定.N-苯甲酰-N-苯胲光度法

标准编号：ISO 1618:1976

中文名称：主要用于制铝的氧化铝.钒含量的测定.N-苯甲酰-N-苯胲光度法

英文名称：Aluminium oxide primarily used for the production of aluminium — Determination of vanadium content — N-Benzoyl-N-phenylhydroxylamine photometric method

发布日期：1976-09

标准范围

该方法适用于钒含量在00003%（m/m）和0016%（m/m）之间的产品，前提是氧化铬和氧化钛的含量分别不超过0002%（m/m）和0006%（m/m）。其原理在于，之前在硫酸溶液中用高锰酸钾将试样中的钒氧化为钒（V）。钒-N-苯甲酰-N-苯基羟胺络合物的形成。在盐酸*溶液中用氯仿萃取紫色络合物。在约524 nm波长下对有色络合物进行光度测量。

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.

标准预览图