本文研究了二溴苯基萤光酮-表面活性剂-铌三元体系的荧光特性,提出了以二溴苯基萤光酮-溴化十六烷基三甲基铵荧光光度法测定铌的新方法,该方法选择性和灵敏度以及重现性均很好,在λ_(ex)=420nm,λ_(em)=470 nm处铌含量在0～6μg/25ml范围内,线性关系良好、采用适当的掩蔽剂测定钢样中的微量铌,获得了满意的结果。 In this paper, the fluorescence characteristics of dibromophenylfluorone-surfactant-niobium ternary system were studied. The fluorescence characterization of niobium with dibromophenylfluorone-cetyltrimethylammonium bromide fluorimetry The new method has good selectivity and sensitivity as well as good reproducibility. The linear relationship between niobium content of 0-6μg / 25ml at λ_ (ex) = 420nm and λ_ (em) = 470nm is good, The masking agent for the determination of trace niobium in the steel samples obtained satisfactory results.