期刊
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
卷 380, 期 1, 页码 7-14出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00216-004-2737-4
关键词
ion-selective electrode; solid contact; polypyrrole; lower detection limit
资金
- NIBIB NIH HHS [8R01 EB002189-04] Funding Source: Medline
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.
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