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Sm-2-噻吩甲酰三氟丙酮(TTA)-邻菲啰啉(phem)-苯萃取体系已有文献报道,但灵敏度低,线性范围窄,且采用有机溶剂,操作麻烦,污染环境。利用非离子表面活性剂的增溶,增敏效应可以直接测定钐且灵敏度有所提高。我们在研究Sm-TTA-phen-TritonX-100等荧光体系时进一步发现,在上述等荧光体系中加入某些特定的稀土离子,有明显的荧光增强效应,我们将这种效应暂命名为共发光效应。本文详细研究了Lu~(3+)浓度及其它因素对共发光效应的影响。最佳形成条件为Lu~(3+)浓度:2.5×10~(-5)mol/dm~3;pH值6.1—7.3;TTA浓
Sm-2-thio-formyltrifluoroacetone (TTA) -phenanthrene (phem) -benzene extraction system has been reported in the literature, but its sensitivity is low, its linear range is narrow, and its use of organic solvents makes it troublesome to pollute the environment. The use of non-ionic surfactant solubilization, sensitization effect can be directly measured samarium and increased sensitivity. We further study Sm-TTA-phen-TritonX-100 and other fluorescent systems and further found that adding some specific rare earth ions in the above fluorescence system, there is a clear fluorescence enhancement effect, we will temporarily named the effect of co-luminescence effect. In this paper, the effects of Lu ~ (3 +) concentration and other factors on the co-luminescence were studied in detail. The best conditions for the formation of Lu ~ (3 +) concentration: 2.5 × 10 ~ (-5) mol / dm ~ 3; pH value of 6.1-7.3;