基于纸基印迹预富集的痕量镉电化学传感器  

Electrochemical sensor for trace Cd(Ⅱ)based on paper-based imprinting preconcentration

作　　者：杨洋春 胡敬芳 肖疏雨[1,2] 宋钰 李延生 高国伟 YANG Yangchun;HU Jingfang;XIAO Shuyu;SONG Yu;LI Yansheng;GAO Guowei(College of Automation,Beijing Information Science&Technology University,Beijing 100192,China;Beijing Key Laboratory of sensor,Beijing Information Science&Technology University,Beijing 100101,China;State Key Laboratories of Transducer Technology,Shanghai Institute of Microsystems and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China)

机构地区：[1]北京信息科技大学自动化学院,北京100192 [2]北京信息科技大学传感器重点实验室,北京100101 [3]中国科学院上海微系统与信息技术研究所传感器联合国家重点实验室,上海200050

出　　处：《传感器与微系统》2024年第3期47-51,共5页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(61601037,61601469);传感技术联合国家重点实验室开放项目(SKT1902)。

摘　　要：重金属镉离子(Cd(Ⅱ))是水体质量评价的重要指标之一,本文提出一种基于纸基印迹预富集的痕量镉电化学传感器构建方法,将离子印迹技术、丝网印刷技术、蜡印法和电化学还原有机结合,合成纸基Cd(Ⅱ)印迹聚合物膜(Cd(Ⅱ)-IIP@paper),获得改性后的纸基电极(rGO/SPCE@paper)。通过优化石墨烯沉积时间、预富集时间、模板离子洗脱时间等实验条件,发现在5~100μg/L浓度范围内Cd(Ⅱ)溶出峰电流与浓度表现出良好的线性关系,检出限为0.91μg/L(S/N=3)。结果表明:Cd(Ⅱ)-IIP@paper具有较好的重复性和稳定性,制备的电化学传感器表现出良好的选择性,将其应用于实际水样中Cd(Ⅱ)的检测,回收率在94.0%~104.4%之间,具有较强的实用价值。Heavy metal cadmium ion(Cd(Ⅱ))is one of the important indicators of water quality evaluation.An electrochemical sensor for trace cadmium based on paper-based imprinting preconcentration is proposed.Ion imprinting,screen printing,wax printing and electrochemical reduction are organically combined to synthesize paper-based ion imprinted polymer membranes(Cd(Ⅱ)-IIP@paper)and obtain the modified paper-based electrode(rGO/SPCE@paper).By optimizing the experimental conditions such as graphene deposition time,preconcentration time and template ion elution time,it is found that the peak current of Cd(Ⅱ)dissolution shows a good linear relationship with the concentration in the range of 5~100μg/L,and the detection limit is 0.91μg/L(S/N=3).The results show that Cd(Ⅱ)-IIP@paper has good repeatability and stability,and the the prepared electrochemical sensor also exhibits good selectivity.It is applied to the detection of Cd(Ⅱ)in actual water samples,and the recovery is 94.0%~104.4%,which has strong practical value.

关 键 词：纸基离子印迹聚合物 预富集 电化学传感器 水质痕量镉离子检测 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] X832[自动化与计算机技术—控制科学与工程]