A polypyrrole-based solid-contact Pb²⁺-selective PVC-membrane electrode with a nanomolar detection limit

Authors

Jolanda Sutter, ETH Zürich
Ernö Lindner, University of Memphis
Robert E. Gyurcsányi, Budapest University of Technology and Economics
Ernö Pretsch, ETH Zürich

Abstract

Ion-selective electrodes (ISE) based on conventional plasticized PVC membranes with solid inner contact (SC) have so far had unsatisfactory lower detection limits. Here it is shown that electropolymerization of pyrrole in the presence of potassium hexacyanoferrate(II)/(III) on Pt results in adequate inner contact for SC-ISE. The nanomolar lower detection limit achieved with the Pb2+-selective PVC membranes investigated is comparable with values obtained with optimized internal solutions of liquid-contact ISE. © Springer-Verlag 2004.

Publication Title

Analytical and Bioanalytical Chemistry

Recommended Citation

Sutter, J., Lindner, E., Gyurcsányi, R., & Pretsch, E. (2004). A polypyrrole-based solid-contact Pb²⁺-selective PVC-membrane electrode with a nanomolar detection limit. Analytical and Bioanalytical Chemistry, 380 (1), 7-14. https://doi.org/10.1007/s00216-004-2737-4