ZnSe量子点增敏碱性鲁米诺-高碘酸钾流动注射化学发光法测定苯甲酸  

ZnSe Quantum Dots Sensibility-enhanced Alkaline Luminol-Potassium Periodate Flow Injection Chemiluminescence Determination of Benzoic Acid

作　　者：王爱连[1,2] 罗晓伟[1,2] 王乐政 国云 马永钧[1,2] 周敏[1,2] 

机构地区：[1]西北师范大学甘肃省生物电化学与环境分析重点实验室,甘肃兰州730070 [2]西北师范大学化学化工学院,甘肃兰州730070

出　　处：《宁夏大学学报（自然科学版）》2016年第2期223-227,共5页Journal of Ningxia University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(21167015)

摘　　要：基于在碱性介质中,苯甲酸对ZnSe QDs增敏后的碱性鲁米诺-KIO_4体系的化学发光有抑制作用,建立流动注射化学发光分析方法测定苯甲酸的含量.在最优条件下,体系化学发光强度的猝灭值与苯甲酸的质量浓度在1.0×10^(-7)~1.0×10^(-5) g/mL内呈良好的线性关系,检出限为5.7×10^(-8) g/mL(3σ).对1.0×10^(-6) g/mL的苯甲酸标准溶液平行测定10次,相对标准偏差为1.02%(n=10).该方法用于水样中苯甲酸的检测,加标回收率为92.7%~107.1%.讨论体系的化学发光机理.The flow-injection chemiluminescence analysis to measure benzoic acid content was established as benzoic acid has inhibiting effect on chemiluminescence of sensibility-enhanced ZnSe QDs-luminol-KIO_4 system in alkaline medium.Under the optimal conditions,the quenching value of chemiluminescence intensity and mass concentration of benzoic acid present good linear relation within 1.0×10^-7-1.0×10^-5g/mL,and the detection limit is 5.7×10^-8 g/mL（3σ）.The 1.0×10^-6 g/mL benzoic acid standard solution was under parallel determination for 10 times,and the relative standard deviation is 1.02 %（n=10）.The method is used for the detection of benzoic acid in water samples,and the recovery rate is92.7%~107.1 %.It also discusses the chemiluminescent mechanism of the system.

关 键 词：ZNSE量子点 鲁米诺 化学发光 流动注射 苯甲酸 

分 类 号：O652.1[理学—分析化学]