摘要
在1molL^(-1)的硝酸介质中,硝基磺酚S与铌生成蓝色的络合物,其最大吸收波长是635nm,摩尔吸光系数是3.0×10~4,含铌量0～10μg/25ml范围内符合比尔定律,方法灵敏度高,探作简便、快速、易于掌握,用于测定硝酸溶液中微量铌获得满意结果。图6,表2,参4。
The niobium-nitrosulfophenol S complex formed in Imol. L^(-1) nitric acid is blue. The wave length of maximum absorbance is 635nm. Apparent molar absorptivity reached 3.0 x 10~4. Beer's law is obeyed in the range of 0～10μg/25ml for niobium.This method is characterized by high sensitivity, rapidity, easy to operate. Satisfactory result was obtained for determination of microamounts niobium in solution of nitric acid. 6figs., 2tabs., 4refs.
出处
《湘潭矿业学院学报》
1993年第3期69-73,共5页
Journal of Xiangtan Mining Institute
关键词
分光光度法
铌
硝酸
硝基磺酚S
spectrophotometry
niobium
nitric acid
nitrosulfophenol S
