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Position: Home > Articles > Rapid detection of malachite green by voltammetry based on functionalized electrode Progress in Fishery Sciences 2012,33 (3) 117-123

功能性电极快速伏安检测孔雀石绿

作  者：
吕志林;张旭志;马绍赛;周明莹;赵俊;孔青
单  位：
中国海洋大学食品科学与工程学院;农业部海洋渔业可持续发展重点实验室中国水产科学研究院黄海水产研究所
关键词：
修饰电极;孔雀石绿;伏安法;渔业环境监测
摘  要：
用阴离子表面活性剂十二烷基硫酸钠(SDS)修饰导电炭黑糊电极,制备了对孔雀石绿(MG)具有高灵敏度的功能传感器。实验对MG在该功能电极上的电化学行为进行了研究,并对影响测定的各种条件(制备糊电极所用导电材料种类;功能试剂修饰量;支持电解质的离子强度、pH值、种类;富集电位与时间等)进行了优化。在优化条件下,MG的氧化峰电流(ipa)与其浓度在5～200μg/L范围内呈线性关系,检测限为1.5μg/L(S/N=3)。该方法具有较高的灵敏度、良好的重现性和稳定性。应用于测定经过简单过滤预处理后的淡水渔业水样,平均回收率为90%。
译  名：
Rapid detection of malachite green by voltammetry based on functionalized electrode
作  者：
Lü Zhi-lin1 ZHANG Xu-zhi2 MA Shao-sai2 ZHOU Ming-ying2 ZHAO Jun2 KONG Qing1(1 School of Food Science and Engineering,Ocean University of China,Qingdao 266003)(2Key Laboratory of Sustainable Development of Marine Fisheries,Ministry of Agriculture, Yellow Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Qingdao 266071)
关键词：
Modified electrode Malachite green(MG) Voltammetry Monitoring on the fishery environment
摘  要：
A special electrochemical sensor system for detecting malachite green(MG) based on sodium dodecyl sulfate functionalized conductive carbon black paste electrode was established.The electrochemical behaviors of MG at the functionalized electrode were studied.And the effecting factors,including conductive carbon materials,content of the modifying agent,ionic strength and species of the supporting buffer solution,pH,accumulation potential,and accumulation time were optimized.Under the optimized conditions,in the range of 5 ~ 200 μg/L,the dependence of the anodic peak current on the concentration of MG was linear with a detection limit of 1.5 μg/L(signal/noise = 3).This method exhibited high sensitivity,good stability and reproducibility.After a simple pretreatment by filtration,MG in real fresh water samples from fishery environmental was detected.And the results were satisfactory with a 90% average recovery rate.

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