赤泥-钛白废酸浸出液中微量钪的检测

The Sc(Ⅲ) Detection on Digestion Solution of Red Mud and Spent Acid From Titanium Dioxide Plant

研究了在赤泥-钛白废酸浸出液中微量钪（Ⅲ）的测定,采用铬天青S作显色剂,考察了反应条件对检测结果的影响,确定了酸浸液中钪的最佳检测条件.实验结果表明,有色溶液的最大吸收波长为615nm,表观摩尔吸光系数为1.57×105 L·mol-1·cm-1.钪（Ⅲ）的质量浓度在0～14 g/50mL范围内符合比耳定律,分光光度法应用于赤泥-钛白废酸浸出液中微量钪的测定,结果满意.

The Sc（Ⅲ） detection was studied in digestion solution from the reaction of red mud and spent acid in titanium dioxide plant, chrome azurol was used as color developer, the influence of reaction condition on detection result was studied,and the best detection condition was determined. The result revealed： The maxlum absorption wavelength was 615nm, and the apparent molar absorption coefficient was 1.57 × 105 L· tool-l · cm-l. The concentration of Sc（Ⅲ） complied with the Beer~ Law and the application of Spectrophotometry was satisfied on Sc （Ⅲ） detection of red mud and spent acid solution.