工业用仲甲醛 试验方法 第三部分:铁含量的测定 2,2"-联吡啶光度法
Paraformaldehyde for industrial use -- Methods of test -- Part 3: Determination of iron content -- 2,2''- Bipyridyl photometric method
摘要: Conversion of iron contained in a test sample to sulphate by treatment with hot sulphuric acid. Oxidation of the iron present in the solution by hydrogen peroxide and subsequently reduction of the iron(III) by hydroxylammonium chloride. Formation of the coloured complex iron(II)-2,2''bipyridyl in a buffered medium. Photometric measurement of the coloured complex at a wavelength of about 510 nm. - ISO 1391, Parts 1 to 4, replace ISO Recommendation R 1391-1970.
标准编号: ISO 1391-3-1976
发布单位: IX-ISO
发布日期: 1976年12月1日
状态: 废止
强制性标准:
实施日期: 1976年12月1日
开本页数: 4
中国标准分类号:
G G15
有机化工原料
国际标准分类号: 71 71.080.80