Chinese Acad Sci, Yantai Inst Coastal Zone Res, CAS, Yantai 264003, Peoples R China;Chinese Acad Sci, Yantai Inst Coastal Zone Res, Shandong Prov Key Lab Coastal Zone Environm Proc, Yantai 264003, Peoples R China ;Yantai Univ, Coll Chem & Chem Engn, Yantai 264005, Peoples R China
Qin, W (通讯作者),Chinese Acad Sci, Yantai Inst Coastal Zone Res, CAS, Yantai 264003, Peoples R China
In this work, a novel all-solid-state polymeric membrane Pb(2+)-selective electrode was developed by using for the first time poly(2-methoxy-5-(2'-ethylhexyloxy)-p-phenylene vinylene) (MEH-PPV) as solid contact. To demonstrate the ion-to-electron transducing ability of MEH-PPV, chronopotentiometry and electrochemical impedance spectroscopy measurements were carried out. The proposed electrodes showed a Nernstian response of 29.1 mV decade(-1) and a lower detection limit of subnanomolar level. No water film was observed with the conventional plasticized PVC membrane. This work demonstrates a new strategy for the fabrication of robust potentiometric ion sensors. (C) 2011 Elsevier B.V. All rights reserved.