【摘要】 本文研究了萘啶酮酸（NA）体系荧光法同时测定铕、铽、镝的最佳条件。在pH值75、3．0×10-4mol／LNA、激发波长342nm的条件下，可分别在612、546、576nm处测定铕、铽、镝，检测限可分别达到1．3、1．0、4．4μg／L。应用本法同时测定了混合稀土试样中铕、铽、镝，取得较满意的结果。更多还原

【Abstract】 This paper reports the optimum conditions for fluorometric determination of Eu3+, Tb3+, Dy3+ complexes with nalidixic acid and the effect of coexisting ions. The detection limit of Eu, Tb and Dy is 1. 3, 1.0, 4. 4μg/L, respectively. These three ions in mixed rare earth oxides were determined with this method. The results analysed agree well with those obtained by other methods.更多还原