发现在萘啶酮酸体系荧光法同时测定Eu~(3+),Tb~(3+),Dy~(3+)含量时,由于 Y~(3+)的存在能使这些离子的特征荧光显著增敏,检测限可分别达到0.2,0.02,0.01ng/ml,从而开发了 Y~(3+)-萘啶酮酸增敏体系同时测定 Eu~(3+),Tb~(3+),Dy~(3+)的荧光新体系。应用本法同时测定了混合稀土试样、荧光级氧化钇中的 Eu~(3+),Tb~(3+),Dy~(3+),取得满意的结果。 It is found that the characteristic fluorescence of these ions can be enhanced by the presence of Y ~ (3 +) in the simultaneous determination of Eu ~ (3 +), Tb ~ (3 +) and Dy ~ (3+) (3 +) - nalidixic acid sensitizing system was developed for simultaneous determination of Eu ~ (3 +), Tb ~ (3+) , Dy ~ (3+) fluorescence system. The Eu (3 +), Tb ~ (3 +) and Dy ~ (3 +) in the mixed rare earth samples and the fluorescent yttrium oxide were measured simultaneously by this method and satisfactory results were obtained.