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钐-2噻吩甲酰三氟丙酮(TTA)-邻菲哕啉(Phen)-苯萃取荧光体系的研究结果表明,钐的测定灵敏度较低,符合比耳定律的浓度范围也较窄。我们在实验中发现,在Sm-TTA-Phen-TritonⅩ-100体系中加入一定浓度的钇,会使体系的荧光强度提高近1～3个数量级。这种由于某种稀土离子的存在而大大提高另一些稀土荧光体系发光强度的效应,暂称为共发光现象。研究结果表明,可将其应用于痕量钐的测定。
The results of samarium-2-thiophenoxytrifluoroacetone (TTA) -phenanthrene (Phen) -benzene extraction fluorescence system show that the determination sensitivity of samarium is low, and the range of concentration according to Beer’s law is also narrow. We found in experiments that adding a certain concentration of yttrium to Sm-TTA-Phen-Triton X-100 system will increase the fluorescence intensity of the system by nearly 1 to 3 orders of magnitude. This due to the existence of some kind of rare earth ions greatly enhance the luminescence intensity of other rare earth fluorescent effect, tentatively called co-luminescence phenomenon. The results show that it can be applied to the determination of trace samarium.