石墨烯锰卟啉复合电极测定磺胺  

Determination of sulfonamide by graphene-manganese porphyrin composite electrode

作　　者：秦洪伟[1] 闫彬[1] 王鑫 刘妍 尤国红 QIN Hong-wei;YAN Bin;WANG Xin;LIU Yan;YOU Guo-hong(College of Chemistry and Chemical Engineering,Bohai University,Jinzhou 121013,China;College of Engineering,Bohai University,Jinzhou 121013,China)

机构地区：[1]渤海大学化学化工学院,辽宁锦州121013 [2]渤海大学工学院,辽宁锦州121013

出　　处：《现代化工》2020年第8期214-217,共4页Modern Chemical Industry

基　　金：国家自然科学基金项目(41602351);辽宁省自然科学基金指导计划项目(2019-ZD-0504)。

摘　　要：运用差分脉冲伏安法(DPV)研究了磺胺在石墨烯锰卟啉复合材料修饰电极(GR-MnTPP/GCE)上的电化学行为。结果表明,在pH=7.0的磷酸盐缓冲溶液中产生了一个不可逆的氧化峰,峰电位为0.89 V;同时在5.0×10-6~2.0×10-4mol/L范围内,磺胺的电化学检测峰电流与浓度呈现明显的线性关系,线性方程为y=0.114c+11.982,相关系数R=0.9989,平行测定的相对误差小于1.378%(n=7)。研究表明,利用石墨烯锰卟啉复合材料修饰电极对磺胺的电化学检测有良好的响应效果,可以应用于对磺胺的测定。Electrochemical determination of sulfonamide at graphene-manganese porphyrin composite modified electrode(GR-MnTPP/GCE)is studied by differential pulse voltammetry(DPV).The results show that an irreversible oxidation peak is generated with a peak potential of 0.89 V in the phosphate buffer solution with p H=7.0.At the same time,in the range of 5.0×10-6-2.0×10-4 mol·L-1,the peak current of sulfonamide has a clear linear relationship with its concentration.The linear equation for electrochemical detection is y=0.114 c+11.982,the correlation coefficient R=0.9989,and the relative error of parallel determination is less than 1.38%(n=7).It is shown via research that the electrode modified with graphene-manganese porphyrin composite has a good response to the electrochemical detection of sulfonamide and can be applied to the determination of sulfonamide.

关 键 词：石墨烯 锰卟啉 磺胺 差分脉冲伏安法 复合材料 

分 类 号：TQ468[化学工程—制药化工] X132[环境科学与工程—环境科学]