硅钼蓝光度法测定中低碳铬铁中硅元素的含量

The Determination of Silicon in Medium and Low Carbon Ferrochrome by Molybdosilicate Blue Photometry

试料用稀硫酸分解,在约0.15mol/L的酸度下,硅酸与钼酸铵生成硅钼杂多酸,用硫酸亚铁铵将其还原为硅钼蓝,其蓝色的强度与硅含量成一定比例关系,借此,可用光度法测定硅的含量。

The sample was dissolved with dilute sulphuric acid,then under 0.15 mol/L acidity,the silicic acid and ammonium molybdate generated silicon-molybdenum heteropoly acid,and then the ferrous ammonium sulfate was used to reduce it to molybdosilicate blue.There was a definite proportional relationship between its blue strength and silicon content,whereby,the spectrophotometry can be used to determine the content of silicon.