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2-噻吩甲酰三氟丙酮(TTA)和诸如三正辛基氧化膦(TOPO)、邻菲罗啉(phen)等中性附加配位体所组成的协同萃取体系已应用于荧光分析法测定钐和铕,该体系选择性、灵敏度均颇高,适用于岩石、矿物、生物体的分析,但需使用有机溶剂。竹田津等将非离子表面活性剂用于荧光分析,免去了有机溶剂萃取操作,方法简便,如:TTA-TOPO-TritonX-100体系荧光法测定钐、铕,PTA(三氟乙酰特戊酰甲烷)-TOPO-BL-9EX体系荧光法测定钐、铕、铽等。本文使用phen代替TOPO,以非离子表面活性剂吐温80为增溶剂,研究了TTA-phen-吐温80体系荧光法测定钐和铕的最佳条件、干扰离子影响及回收率,均取得较为满意的结果。
The synergistic extraction system consisting of 2-thienoyl trifluoroacetone (TTA) and neutral additional ligands such as tri-n-octylphosphine oxide (TOPO) and phen phenanthrene (phen) has been applied to the determination of Samarium and europium. The system has high selectivity and sensitivity and is suitable for the analysis of rocks, minerals and organisms, but requires the use of organic solvents. Takeda Takeda and other non-ionic surfactants for fluorescence analysis, eliminating the need for organic solvent extraction, the method is simple, such as: TTA-TOPO-TritonX-100 system Determination of samarium, europium, PTA (trifluoroacetyl pivaloylmethane ) -TOPO-BL-9EX system Fluorescence method for the determination of samarium, europium, terbium and the like. This article uses phen instead of TOPO, nonionic surfactant Tween 80 as a solubilizer to study the TTA-phen-Tween 80 fluorescence spectrometry determination of samarium and europium the best conditions, the impact of ion interference and recovery were achieved more Satisfying result.