铽-镧(镥、钇)-均苯四甲酸共发荧光体系的研究和应用

Study on the Fluorescence Enhancement System Terbium Lanthanum(Lutetium or Yttrium) Benzene tetracarbonic Acid and Its Application

研究发现Ｌａ３＋（Ｌｕ３＋、Ｙ３＋）对Ｔｂ３＋－均苯四甲酸（ＢＴＣＡ）体系具有强烈的共发荧光效应，在最佳条件下，共发光离子Ｌａ３＋、Ｌｕ３＋、Ｙ３＋可分别使Ｔｂ－ＢＴＣＡ体系的荧光增强３１２、１３３和１００倍。分析了Ｔｂ－Ｌａ（Ｌｕ、Ｙ）－ＢＴＣＡ共发荧光体系的荧光特点，形成条件和影响因素。利用Ｌａ３＋（Ｌｕ３＋、Ｙ３＋）的增敏效应，测定了合成稀土样品和包头稀土标准氧化物中的Ｔｂ，结果满意，回收试验的回收率为９４．３％～１０４．４％。

fluorescence enhancement by adding La 3+ 、Lu 3+ or Y 3+ to terbium benzene tetra carbonic acid (BTCA) was observed.La 3+ 、Lu 3+ or Y 3+ enhanced the fluorescence intensity by 312,133 and 100 times compared with the systems without them,respectively.The new systems were used for the determination of traces of terbium in the synthetic sample and the standard sample,the lowest detection limit was 9.0×10 -11 mol/L.The recovery test gave satisfactory results