凹凸棒石修饰丝网印刷碳电极的制备及其在Cd(Ⅱ)检测中应用  

Preparation of Screen Printed Carbon Electrode Based on Attapulgite Mineral and Its Application in Cd(Ⅱ)Detection

作　　者：陆紫琪 刘帅 程盖弼 王晓康 陈健强[3] 董元华[1,2] 刘云 LU Ziqi;LIU Shuai;CHENG Gaibi;WANG Xiaokang;CHEN Jianqiang;DONG Yuanhua;LIU Yun(Key Laboratory of Soil Environment and Pollution Remediation,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008;University of Chinese Academy of Science,Beijing 100000;Nanjing Forestry University,Nanjing 210037;Jiangsu Gaiya Environmental Science And Technology Corp,Suzhou 215000)

机构地区：[1]中国科学院南京土壤研究所土壤环境与污染修复重点实验室,江苏南京210008 [2]中国科学院大学,北京100000 [3]南京林业大学,江苏南京210037 [4]江苏盖亚环境科技股份有限公司,江苏苏州215000

出　　处：《分析科学学报》2022年第6期663-669,共7页Journal of Analytical Science

基　　金：国家重点研发项目(No.2020YFC1807200);国家自然科学基金(No.41877504)。

摘　　要：以天然廉价的凹凸棒石粘土矿物修饰丝网印刷碳电极为传感电极,采用方波阳极溶出伏安法对Cd(Ⅱ)进行分析检测。研究了凹凸棒石粘土矿物修饰浓度、富集电位、富集时间、溶液pH以及干扰离子对Cd(Ⅱ)检测的影响。在优化实验条件下,传感电极对Cd(Ⅱ)具有敏感的监测特性,峰电流(y)与Cd(Ⅱ)的质量浓度(x)在10~175μg/L范围内具有良好的响应性能,线性方程为y(μA)=0.09056 x+0.3350(R^(2)=0.9951),检测限(S/N=3)为1.18μg/L。将该传感器应用于实际河水样品中Cd(Ⅱ)加标分析,回收率为98.6%~103.5%。凹凸棒石粘土矿物修饰电极构建的传感器制备简单,价格低廉,检测效果良好,可用于环境中Cd(Ⅱ)的快速检测。The natural and cheap attapulgite clay mineral modified screen-printed carbon electrode was used as the sensing electrode,and Cd(Ⅱ)was analyzed by anodic stripping voltammetry.The effect of concentration of attapulgite clay mineral,the enrichment potential,the enrichment time,solution pH and other ions on Cd(Ⅱ)detection were studied.Under optimized experimental conditions,the screen-printed electrode based on attapulgite clay mineral showed sensitive response and good analysis characteristics for Cd(Ⅱ).It exhibited a good linearity and repeatability in the concentration range of 10-175μg/L,and the linear equation of Cd(Ⅱ)concentration and peak current was y(μA)=0.09056 x+0.33497(R^(2)=0.9951).The limit of detection was 1.18μg/L(S/N=3).The sensor was applied to Cd(Ⅱ)detection through spiked analysis in actual river water samples,and the recovery was 98.6%-103.5%.It is simple to prepare the sensor constructed by the attapulgite clay mineral modified electrode with low price and high sensitivity.It can be used for rapid detection of Cd(Ⅱ)in the environmental samples.

关 键 词：凹凸棒石粘土矿物 电化学传感器 镉 丝网印刷碳电极 

分 类 号：O657.1[理学—分析化学]