6—羟基水杨酸—EDTA—溴化十六烷基三甲铵体系荧光法同时测定铽、镝、钐

FLUOROMETRIC DETERMINATION OF TERBIUM AND SAMARIUM WITH 6—HYDRO—XYSALICYLIC ACID——EDTA——CETYLTRIMETHYLAMMONIUM BROMIDE SYSTEM

探讨了溴化十六烷基三甲铵对Tb^(3+)、Dy^(3+)、Sm^(3+)—6—羟基水杨酸-EDTA三元络合物的荧光增敏效应,开发了利用胶束增敏体系同时测定Tb^(3+)、Dy^(3+)、S_m^(3+)的荧光新体系。Tb^(3+)、Dy^(3+)、S_m^(3+)的相对检测限分别达到了1.0、16、80ng/ml。利用标准加入法成功地测定了某些稀土氧化物中的Tb_4O_7、Dy_2O_3、Sm_2O_3含量。

This paper studied the fluorescence enhancement of Tb^(3+)、Dy^(3+), Sm^(3+)—6—hydroxysalicylic acid—EDTA ternary complexes by cetyltrimethylammonium bromide (CTMAB). A sensitive method of simultaneous determination of Tb^(3+), Dy^(3+), Sm^(3+) in the micellar system was developed. And the optimum conditions of fluorescence reaction have been found. By the standard addition method, the contents of Tb_4O_7、Dy_2O_3、Sm_2O_3 are snceessfully determined in several rare earth oxides.