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Highly Stable Polymeric Ionic Liquid Modified Electrode to Immobilize Ferricyanide for Electroanalysis of Sulfide
Author(s) -
Chang JenLin,
Wei GuorTzo,
Chen TsuYin,
Zen JyhMyng
Publication year - 2013
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201200431
Subject(s) - ionic liquid , ferricyanide , detection limit , sulfide , chronoamperometry , electrode , inorganic chemistry , chemistry , electrochemistry , cyclic voltammetry , chromatography , organic chemistry , catalysis
We report here the preparation and application of a highly stable polymeric ionic liquid‐modified electrode to immobilize ferricyanide for sulfide analysis. Good long‐term stability of the modified electrode verifies its potential in sensor applications. The electrocatalytic sulfide oxidation signal at ∼0.0 V vs. Ag/AgCl in pH 7 PBS at the modified electrode was used for sulfide detection by hydrodynamic chronoamperometry and a detection limit of 12.9 nM ( S / N =3) was obtained. Practical utility of the system is applied to the determination of sulfide content in hot spring water and ground water.