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Reference type: Journal
Authors: Dong SJ, Sun ZS, Lu ZL
Article Title: Chloride chemical sensor based on an organic conducting polypyrrole polymer.
Publication date: 1988
Journal: Analyst
Volume: 113
Issue: (10)
Page numbers: 1525-1528.
DOI: 10.1039/AN9881301525

Abstract: The potential response behaviour of a chloride doped polypyrrole (PPy) polymer film electrode to chloride ion in solution has been examined. The effect of the polymerisation conditions on the characteristics of the potential response and response mechanism is discussed. A chloride ion-selective electrode based on a conducting PPy polymer film was prepared with a potential response slope of 58–60 mV (pCl–)–1 and a detection limit of 3.5 × 10–5M of Cl–. The optimum conditions for the preparation of the electrode were: pyrrole (Py), 0.05–0.2 M; LiCl, 0.1–1 M; scan range for electrochemical polymerisation, 0.5–1.2 V; polymerisation time, 10–30 min; and scan rate, 20–100 mV s–1. The chemical sensor has a fast response, a low resistance, is easy to prepare and is not susceptible to poisoning.

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