ISO 2598-2-1992 铁矿石 硅含量的测定 第2部分:还原硅钼酸盐分光光度法

标准号：ISO 2598-2-1992
中文标准名称：铁矿石 硅含量的测定 第2部分:还原硅钼酸盐分光光度法
英文标准名称：Iron ores; determination of silicon content; part 2: reduced molybdosilicate spectrophotometric method
标准类型：D31
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：D31
国际标准分类号：73.060.10
适用范围：The method is based on decomposition of the test portion by fusion with sodium tetraborate and treatment with dilute nitric acid, addition of ammonium molybdate to convert silicate into a molybdatosilicate complex, reduction to molybdenum blue with ascorbic acid, and spectrophotometric measurement of the absorbance of the molybdenum blue complex at a wavelength of approximately 600 nm. Applies to silicon contents between 0,1 % and 5,0 % in natural iron ores, iron ore concentrates and agglomerates, including sinter products, especially for ores containing fluorine.