A polypyrrole-based solid-contact Pb2+-selective PVC-membrane electrode with a nanomolar detection limit
- 7 August 2004
- journal article
- research article
- Published by Springer Nature in Analytical and Bioanalytical Chemistry
- Vol. 380 (1) , 7-14
- https://doi.org/10.1007/s00216-004-2737-4
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.Keywords
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