论文部分内容阅读
本文研究发现，三价稀土离子Ｌａ３＋的存在对二元配合物Ｄｙ３＋－磺基水杨酸（ＳＳＡ）体系具有强烈的荧光增强效应。在常温条件下，研究了Ｌａ３＋参与下Ｄｙ３＋－ＳＳＡ体系的荧光特性、形成条件和影响因素，结果表明，Ｌａ３＋可使Ｄｙ３＋－ＳＳＡ体系荧光增强１００倍。在最佳条件下，Ｄｙ的浓度在３．０×１０－７～１．０×１０－５ｍｏｌ／ｄｍ３范围内与荧光强度成线性关系，检测限达到８．０×１０－８ｍｏｌ／ｄｍ３。利用该体系测定了合成稀土样品和包头稀土标准样品，结果满意，回收实验的回收率为９９．３％±０．１％。
In this paper, we found that the presence of trivalent rare earth ion La3 + has a strong fluorescence enhancement effect on the binary complex Dy3 + -sulfosalicylic acid (SSA) system. Fluorescence characteristics, formation conditions and influencing factors of Dy3 + -SSA system were studied under normal temperature. The results showed that La3 + can enhance the fluorescence of Dy3 + -SSA system 100 times. Under the optimal conditions, the concentration of Dy was linear with the fluorescence intensity in the range of 3.0 × 10-7 ~ 1.0 × 10-5mol / dm3, and the detection limit was 8.0 × 10-8mol / dm3. The system was used to determine the rare earth samples and Baotou rare earth standard samples with satisfactory results. The recovery of the recovery experiment was 99.3% ± 0.1%.