摘要
考察了温度、时间、显色剂用量、酸度对待测溶液吸光度的影响，结果表明：温度对吸光度值不产生大的影响，在室温下测试即可；溶液显色在前8min内不稳定，其显色时间一定要达到10min，溶液颜色保持16h不发生太大的变化；显色剂氯代磺酚c和sc（Ⅲ）1：1络合稳定，其溶液加入量确定为3rrd；酸度对吸光度有较大的影响，待测溶液的pH值为2．0时吸光度值最大，且稳定。溶液最大吸光度波长为649nnl，工作曲线回归方程为Y=O．03839x-0．0002，相关系数的平方为0．9993，Sc（Ⅲ）的质量浓度在0—1．2mg·L“范围内符合朗伯一比尔定律，表观摩尔吸光系数为7．78×10^5L·mol-1·cm^-1。本法测定赤泥盐酸浸出液中的钪，结果比较稳定，RSD（n=6）为1．45％～4．16％，加标回收率为98％-102％，灵敏度高、结果较满意。
The effects of temperature, time, reagent dosage, solution pH on absorbance showed that： the temperature had little effect on the absorbanee, the solution could be tested at room temperature ; the determination result was not stable within the first 8 min, the solution should achieve a coloration time for 10 rains, the solution color maintained 16 h did not change much; reagent chlorosulpho- phenol C and Sc （ Ⅲ ） 1 ： 1 complex stability, the solution was added 3 ml; acidity had great influence on the absorbance with pH value of 2. 0, the maximum absorbance, and stability. The maximum absorbance of solution was at 649 nm, and the standard curve regression equation： y = 0. 03839x -0. 0002, the square of correlation coefficient was 0. 9993, Lambert-Beer law was obeyed for Sc （ Ⅲ） in the range of 0～1.2 mg.L-1 and the apparent molar absorptivity was 7.78 ×10^5 L.mol-1.cm-1. The method was applied to the deter- mination of Sc （Ⅲ ） in hydrochloric acid leaching solution of red mud, the result was stable with high sensitivity and satisfactory, RSD （n =6） was 1.45%～4.16% and the recovery of Sc（ Ⅲ） was 98% to 102%.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2011年第5期764-769,共6页
Chinese Journal of Rare Metals
基金
国家产学研合作项目(9002-0301)资助
关键词
钪
分光光度法
赤泥
浸出液
scandium
spectrophotometry
red mud
leaching solution
