Application of an Hg2+ selective imprinted polymer as a new modifying agent for the preparation of a novel highly selective and sensitive electrochemical sensor for the determination of ultratrace mercury ions

被引:101
作者
Alizadeh, Taher [1 ]
Ganjali, Mohamad Reza [2 ]
Zare, Mashaalah [2 ]
机构
[1] Univ Mohaghegh Ardabili, Fac Sci, Dept Appl Chem, Ardebil, Iran
[2] Univ Tehran, Fac Chem, Ctr Excellence Electrochem, Tehran, Iran
关键词
Hg2+ imprinted polymer; Electrochemical sensor; Carbon paste electrode; Ultratrace level; CARBON-PASTE ELECTRODE; STRIPPING VOLTAMMETRIC DETERMINATION; SOLID-PHASE EXTRACTION; TRACE MERCURY; CHLORIDE MEDIA; CROWN-ETHER; PRECONCENTRATION; HG(II); RECOGNITION; SORPTION;
D O I
10.1016/j.aca.2011.01.036
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A simple and very selective electrode, based on a mercury ion imprinted polymer (lip), and its application for the determination of Hg2+ ions in the real samples is introduced. Mercury ion selective cavities were created in the vinyl pyridine based cross-linked polymer. In order to fabricate the sensor carbon particles and polymer powder were mixed with melted n-eicosane. An explicit difference was observed between the responses of the electrodes modified with IIP and non imprinted polymer (NIP), indicating proper performance of the recognition sites of the IIP. Various factors, known to affect the response behavior of selective electrode, were investigated and optimized. The interference of different ionic species with the response of the electrode was also studied. The results revealed that, compared to previously developed mercury selective sensors, the proposed sensor was more selective, regarding the common potential interferer. This sensor showed a linear response range of 2.5 X 10(-9)-5.0 x 10(-7) M and lower detection limit of 5.2 x 10(-10) M (SIN). The sensor was successfully applied to the determination of mercury in real samples. (C) 2011 Published by Elsevier B.V.
引用
收藏
页码:52 / 59
页数:8
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