An all-solid-state polymeric membrane Pb²⁺-selective electrode with bimodal pore C₆₀ as solid contact

Jinghui Li; Tanji Yin; Wei Qin

doi:10.1016/j.aca.2015.03.038

An all-solid-state polymeric membrane Pb²⁺-selective electrode with bimodal pore C₆₀ as solid contact

Anal Chim Acta. 2015 May 30:876:49-54. doi: 10.1016/j.aca.2015.03.038. Epub 2015 Mar 26.

Authors

Jinghui Li¹, Tanji Yin², Wei Qin³

Affiliations

¹ Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Shandong Provincial Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai, Shandong 264003, PR China; University of the Chinese Academy of Sciences, Beijing 100049, PR China.
² Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Shandong Provincial Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai, Shandong 264003, PR China.
³ Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Shandong Provincial Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai, Shandong 264003, PR China. Electronic address: wqin@yic.ac.cn.

PMID: 25998457
DOI: 10.1016/j.aca.2015.03.038

Abstract

An all-solid-state polymeric membrane Pb(2+) ion-selective electrode (Pb(2+)-ISE) based on bimodal pore C60 (BP-C60) as solid contact has been developed. A BP-C60 film can be readily formed on the surface of a glassy carbon electrode by electrochemical deposition. Cyclic voltammetry and electrochemical impedance spectroscopy have been employed to characterize the BP-C60 film. The large double layer capacitance and fast charge-transfer capability make BP-C60 favorable to be used as solid contact for developing all-solid-state ISEs. The all-solid-state BP-C60-based Pb(2+)-ISE shows a Nernstian response in the range from 1.0×10(-9) to 1.0×10(-3)M with a detection limit of 5.0×10(-10)M. The membrane electrode not only displays an excellent potential stability with the absence of a water layer between the ion-selective membrane and the underlying BP-C60 solid contact, but also is insensitive to interferences from O2, CO2 and light. The proposed solid-contact Pb(2+)-ISE has been applied to determine Pb(2+) in real water samples and the results agree well with those obtained by anodic stripping voltammetry.

Keywords: All solid state; Bimodal pore C(60); Electrodeposition; Ion-selective electrode; Lead; Solid contact.