双波长分光光度法测定铝土矿中微量磷

Study on determination of micro-amounts of phosphorus in bauxite by dual-wavelength spectrophotometry

建立了双波长分光光度法测定铝土矿中微量磷的方法。探讨并优化了测定波长、Mo(Ⅵ)和Mo(Ⅴ)浓度、显色酸度等条件,与国家标准分析方法对照,测定结果较满意,适用于二氧化硅含量小于45%的铝土矿石或硅酸盐中微量磷的测定。

A method for the determination of micro-amounts of phosphorus in bauxite by dual-wavelength spectrophotometry.Effects of determination wavelength,concentrations of Mo（Ⅵ） and Mo（Ⅴ） and concentration of chromogenic acidity were studied and optimized.Contrasted with the national standard analytical method,the result of determination is relatively satisfactory and is suitable for the determination of micro-amounts of phosphorus in the bauxite which the content of silica is less than 45% and silicate.