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%。
A special electrochemical sensor system for detecting malachite green （MG） based on sodium dodecyl sulfate functionalized conductive carbon black paste electrode was es- tablished. The electrochemical behaviors of MG at the functionalized electrode were studied. And the effecting factors, including conductive carbon materials, content of the modifying a- gent, 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.
出处
《渔业科学进展》
CSCD
北大核心
2012年第3期115-121,共7页
Progress in Fishery Sciences
基金
国家自然科学基金(21005086)
基本科研业务费(2010-cb-01)共同资助
关键词
修饰电极
孔雀石绿
伏安法
渔业环境监测
Modified electrode Malachite green （MG） VoltammetryMonitoring on the fishery environment
