ISO 3429-1976 主要用于铝生产的氟化钠 铁含量的测定 1,10-菲罗啉光度法

标准号：ISO 3429-1976
中文标准名称：主要用于铝生产的氟化钠 铁含量的测定 1,10-菲罗啉光度法
英文标准名称：Sodium fluoride primarily used for the production of aluminium; Determination of iron content; 1,10- Phenanthroline 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：71.060.50
适用范围：Applicable to the determination of Fe contents, expressed as Fe2 O3 , of more than 0.020 % (m/m). Covers the dissolution of a test portion by alkaline fusion by means of sodium carbonate and boric acid. Dissolving of the residue with nitric acid solution and reduction of iron(III) by means of hydroxylammonium chloride. Formation of the iron(II)-1,10-phenanthroline complex in a buffered medium at a pH between 3.5 and 4.2. Photometric measurement of the coloured complex at a wavelength of about 510 nm.