基于CdTe量子点荧光探针对稀土元素铕的快速检测  

Rapid detection of rare earth element europium based on CdTe quantum dot fluorescence probe

作　　者：赵文浩 王蓉蓉 何杨 何文涛 尚可霞 ZHAO Wen-hao;WANG Rong-rong;HE Yang;HE Wen-tao;HANG Ke-xia(Medicine College of Hexi University,Zhangye 734000,China;Key Laboratory of Hexi Corridor Resources Utilization of Gansu,Zhangye 734000,China)

机构地区：[1]河西学院医学院,甘肃张掖734000 [2]甘肃省河西走廊特色资源利用重点实验室,甘肃张734000

出　　处：《化学研究与应用》2024年第5期955-961,共7页Chemical Research and Application

基　　金：甘肃省高校教师创新基金项目(2023B-178)资助;河西学院科研创新与应用校长基金一般项目(XZ2021017)资助;大学生创新训练计划项目(S202110740014)资助。

摘　　要：铕(Eu)作为地球储备较少的稀土元素之一,在很多领域都有重要作用。本文通过一锅法合成了巯基乙酸修饰的CdTe量子点作为荧光探针,并基于稀土元素铕离子对于荧光探针的特异性猝灭作用,建立了水环境中对稀土元素铕离子的快速检测。在最佳条件下,在49.97nmol·L^(-1)~1088.03nmol·L^(-1)的浓度的范围内,CdTe荧光探针猝灭强度与Eu^(3+)浓度呈现良好的线性关系,检出限为36.47nmol·L^(-1),相关系数为0.9992。该方法对水环境中Eu^(3+)检测中回收率为108.2%~112.4%,具有响应速度快、简单、特异性强、灵敏度高等突出优点。Europium(Eu),as one of the rare earth elements with relatively low reserves on Earth,plays an important role in many fields.A kind of CdTe quantum dots modified with thioglycolic acid as fluorescence probes was synthesized through a one pot method.Based on the specific quenching effect of rare earth element europium ions on the fluorescence probes,a rapid detection of rare earth element europium ions in aqueous environments was established.Under optimal conditions,within the concentration range of 49.97nmol·L^(-1)to 1088.03nmol·L^(-1),the quenching intensity of CdTe fluorescence probe exhibits a good linear relationship with Eu3*concentration,with a detection limit of 36.47 nmol L-and a correlation coefficient of 0.9992.This method has a recovery rate of 108.2%~112.4%for Eu*detection in aquatic environments,and has outstanding advantages such as fast response speed,simplicity,strong specificity and high sensitivity.

关 键 词：CDTE量子点 稀土元素铕 荧光探针 快速检测 

分 类 号：O657.3[理学—分析化学]