t-BAMBP萃取-原子吸收分光光度法测定矿物中微量铷、铯

t-BAMBP Extraction-Atomic Absorption Spectrophotometric Determination of Trace Rubidium and Cesium in Minerals

利用4-叔丁基-2-(α-甲苄基)酚(t-BAMBP)萃取矿物中微量的铷和铯,再利用原子吸收分光光度法测定其在萃取剂中的浓度.并对稀释剂的选择、萃取酸碱度、相比影响、萃取时间及干扰离子等进行了研究.实验结果表明,检出限分别为铷:0.02μg/g,铯:0.08μg/g.标准浓度在0～200μg/50 mL时,线性关系大于0.998 9,样品加标回收率在96.4%～104.4%之间,相对误差小于1%.

Using 4-tert-butyl-2-（α-methylbenzyl） phenol（t-BAMBP） to extract micro amounts of rubidium and cesium in the minerals,and then their concentrations in the extractants are tested using atomic absorption spectrophotometry. The selection of exlractant, extraction pH, comparison of the effect, extraction time, interfering ions etc. are studied. Experimental results showed that the detection limit of rubidium is 0.02μg/mL, cesium 0.08 μg/mL, when the concentrations of standard substances are in the range of 0- 200 μg/50 mL, the linear relationship is not lower than 0. 998 9, the recovery rate is between 96.4% - 104.4% , and the relative error is less than 1%.