邻菲罗啉荧光增强法测定镉  

Determination of Cadmium by the Fluorescence Enhancement Method with 1,10-Phenanthroline as Probe

作　　者：田竟[1] 李宇微 许倩影[2] 刘绍璞[1] 胡小莉[1] 

机构地区：[1]发光与实时分析教育部重点实验室/西南大学化学化工学院,重庆400715 [2]重庆材料研究院,重庆400707

出　　处：《西南大学学报（自然科学版）》2014年第5期96-99,共4页Journal of Southwest University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(20875078);重庆市科委重点实验室专项经费资助

摘　　要：在pH=5.5的BR缓冲溶液中,Cd（Ⅱ）与邻菲罗啉（phen）相互作用,导致反应体系的荧光增强,最大激发和最大发射波长分别为328nm和368nm.Cd（Ⅱ）质量浓度在0.4~21.0μg/mL范围内与体系荧光增强值（ΔF）呈良好的线性关系,检出限为138.9ng/mL.实验研究了荧光增强反应的适宜条件和影响因素,考察了共存物质的影响,表明方法具有较好的选择性,可用于环境水样中Cd（Ⅱ）含量的测定.In pH 5.5Britton-Robinson（BR）buffer solution,Cd（Ⅱ）reacted with 1,10-phenanthroline（phen）and resulted in fluorescence enhancement of the reaction system,the maximum excitation and emission wavelength being 328and 368nm,respectively.The fluorescence enhancement values（ΔF）of phen showed a good linear relationship to the concentration of Cd（Ⅱ）in the range of 0.4~21.0μg/mL. The method exhibited a high sensitivity with a detection limit（3σ/K）of 138.9ng/mL.The optimum reaction conditions,influencing factors and the effect of coexisting substances were investigated in the experiment. The results showed that this method had a good selectivity and could be applied to determine Cd（Ⅱ）in environmental water samples.

关 键 词：邻菲罗啉 镉 荧光增强 

分 类 号：O657.3[理学—分析化学]