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利用铕(Ⅲ)与噻吩甲酰三氟丙酮(TTA)、N-羟乙基乙二胺三乙酸(HEDTA)形成异配位体络合物的荧光光度法测定铕,文献中已有简报,但反应条件不详。我们发现在上述体系中加入乙醇可在很大程度上提高异配位络合物的荧光强度。因此,对Eu(Ⅲ)-TTA-FIEDTA-C_2H_5OH体系的荧光性质进行了研究。用于La_2O_3和Y_2O_3中痕量铕的测定得到了比较满意的结果。
Europium has been reported in the literature for the determination of europium using the fluorescence spectrometry of the formation of heteroleptic complexes of europium (III) with thio-formyltrifluoroacetone (TTA) and N-hydroxyethylethylenediaminetriacetic acid (HEDTA) However, the reaction conditions are unknown. We found that adding ethanol to the above system can greatly improve the fluorescence intensity of the heterodimeric complex. Therefore, the fluorescence of Eu (Ⅲ) -TTA-FIEDTA-C_2H_5OH system has been studied. The results for the determination of trace europium in La_2O_3 and Y_2O_3 obtained satisfactory results.