利用稀土—六氟乙酰丙酮(HFA)—三辛基氧化膦(TOPO)荧光萃取体系,测定稀土金属离子已为文献所报道。但该法操作麻烦,且使用大量有毒溶剂。本文利用Triton X-100对上述体系的增溶和增敏作用,同时测定了铕和铽。结果表明,Eu~(3+)和Tb~(3+)在1.0×10~(-9)～5.0×10~(-7)M范围内遵守比尔定律,检出限达到10~(-10)M数量级。该法 The use of rare earth - hexafluoroacetylacetone (HFA) - trioctylphosphine oxide (TOPO) fluorescence extraction system for the determination of rare earth metal ions have been reported in the literature. However, the method is cumbersome to operate and uses a large amount of toxic solvents. In this paper, Triton X-100 was used to solubilize and sensitize the above-mentioned system, meanwhile, europium and terbium were determined. The results showed that Beer ’s law was obeyed in the range of 1.0 × 10 -9 ~ 5.0 × 10 -7 M for Eu 3+ and Tb 3+, and the detection limit was 10 ~ (-10) ) M order of magnitude. The law