摘要
将利用电化学法制备的石墨烯溶于N,N-二甲基甲酰胺溶液中超声分散1 h,并滴涂在玻碳电极表面,构建了一种基于石墨烯修饰电极的电化学传感器。利用循环伏安法和线性扫描伏安法探究了4-氯苯氧乙酸在该修饰电极上的电化学行为,差分脉冲伏安法检测了4-氯苯氧乙酸的浓度。结果表明,该传感器在浓度为0.5~100μmol/L的范围内呈良好的线性关系,最低检出限为0.13μmol/L(S/N=3)。具有良好的稳定性和抗干扰能力,将其应用于黄豆芽中的4-氯苯氧乙酸的检测,回收率为93.36%~101.40%。
Graphene prepared by electrochemical method is dissolved in N,N-dimethyl formamide solution and dispersed by ultrasound for 1 hour.An electrochemical sensor based on graphene-modified electrode is constructed by coating the dispersed graphene on the surface of glassy carbon electrode.The electrochemical behavior of 4-chlorophenoxyacetic acid on the graphene-modified electrode is investigated by cyclic voltammetry and linear scanning voltammetry,and the concentration of 4-chlorophenoxyacetic acid is determined by differential pulse voltammetry.The results show that the sensor has a good linear relationship in the concentration range of 0.5-100μmol·L^-1,and the minimum detection limit is 0.13μmol·L^-1(S/N=3).It exhibits a good stability and strong anti-interference ability.As it is applied to the detection of 4-chlorophenoxyacetic acid in soybean sprouts,the recovery rate is in the range of 93.36%-101.4%.
作者
杜科志
杜海军
张艳
张欣月
杨蓉
张姣姣
DU Ke-zhi;DU Hai-jun;ZHANG Yan;ZHANG Xin-yue;YANG Rong;ZHANG Jiao-jiao(School of Chemical Engineering,Guizhou Minzu University,Guiyang 550025,China;School of Ethnic-Minority Medicine,Guizhou Minzu University,Guiyang 550025,China)
出处
《现代化工》
CAS
CSCD
北大核心
2020年第9期231-234,共4页
Modern Chemical Industry
基金
国家自然科学基金项目(81860701)
贵州省留学人员科技活动择优资助项目(黔人项目资助合同(2018)008号)
贵州省普通高等学校“绿色化学与资源环境创新团队”项目(黔教合人才团队字[2015]62)
贵州民族大学自然科学基金(校科字(2019)1号)。
关键词
差分脉冲伏安法
4-氯苯氧乙酸
植物生长调节剂
石墨烯修饰电极
differential pulse voltammetry
4-chlorophenoxyacetic acid
plant growth regulator
graphene modified electrode
