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.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
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
关键词
邻菲罗啉
镉
荧光增强
1,10-phenanthroline
cadmium
fluorescence enhancement
