摘要
本文制备了一种基于分子印迹技术的电化学传感器，并成功应用于环境水样中Pb（Ⅱ）的检测。以铅-没食子酸配合物（Pb—Gal）为模板分子，用电聚合邻苯二胺（o-PD）的方法在铂电极上聚合了Pb—Gal分子印迹聚合物膜。根据印迹膜对Pb—Gal的识别作用对Pb（Ⅱ）进行间接测定。以K3[Fe（CN）6]／K4[Fe（CN）6]为探针，利用其氧化还原电流信号变化实现对Pb（Ⅱ）的检测。通过对配合物整体的识别，提高了检测的灵敏度。研究表明，在0．03～30nmol／L范围内，Pb（Ⅱ）浓度的对数值（IgCPb（Ⅱ）与氧化峰电流变化值（△i）呈线性关系，检出限为0．0163nmol／L。
In this paper,we reported a kind of electrochemical sensor based on molecularly imprinted technique,and it has been successfully applied to the determination of lead ion in water samples.With lead-gallic acid complexes as a template molecule,a molecularly imprinted membrane with lead-gallic acid complexes was prepared by electro-polymerization o-phenylenediamine method at a platinum electrode.According to the recognition of molecular imprinting film for lead-gallic acid complexes,we can indirectly detect Pb（Ⅱ）.Utilizing potassium ferricyanide solution as a probe,its redox current change was used to detect lead ion.The sensitivity has been improved by identification of the overall complex.There was a good linear relationship between the concentrations of Pb（Ⅱ）in the forms of（lgcPb（Ⅱ））and the current changes（△i）.The detection limit was 0.0163nmol/L.
出处
《分析科学学报》
CAS
CSCD
北大核心
2015年第4期470-474,共5页
Journal of Analytical Science
基金
国家自然科学基金(No.21165007
21375031)
