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1 引 言 本文研究了铽(Tb~(3-))对钐(Sm~(3-))-2-噻吩甲酰三氟丙酮(TTA)-氯代甲基三烷基铵(N_(263))-Triton X-100荧光体系的共发光效应,结果表明:Tb~(3-)的浓度1×10~(-5)～5×10~(-5)mol/L范围内体系的荧光强度最大.Sm~(3-)的浓度在1.0×10~(-9)～1.0×10~(-7)mol/L范围内与荧光强度呈线性关系,检测限为1.0X10~(-11)mol/L,方法灵敏,简便,用于混合稀土样品中痕量Sm~(3-)的测定,结果满意。
1 Introduction The effects of terbium (Tb ~ (3-)) on the formation of samarium (Sm ~ (3 -)) - 2-butanoyltrifluoroacetone (TTA) ) -Triton X-100 fluorescence system. The results showed that the fluorescence intensity of Tb ~ (3-) in the range of 1 × 10 -5 ~ 5 × 10 -5 mol / L The maximum concentration of Sm ~ (3-) showed a linear relationship with the fluorescence intensity in the range of 1.0 × 10 -9 ~ 1.0 × 10 -7 mol / L with the detection limit of 1.0 × 10 ~ (-11) mol / L. The method is sensitive and simple, and it is suitable for the determination of trace Sm ~ (3-) in mixed rare earth samples with satisfactory results.