P1.1.22 Chitosan Modified Gold Film Microelectrode for the Determination of Iodide
- Event
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany - Chapter
- P1.1 Biosensors
- Author(s)
- Y. Zhang, M. Wang - Institute of Microanalytical Systems, Department of Chemistry, Zhejiang University (China)
- Pages
- 877 - 879
- DOI
- 10.5162/IMCS2012/P1.1.22
- ISBN
- 978-3-9813484-2-2
- Price
- free
Abstract
A simple electrochemical method for iodide detection using colloid Au/chitosan modified gold film microelectrode was developed. The modified electrode was prepared by coating colloid Au/chitosan membrane on the surface of a gold film microelectrode, whose working area could be easily adjusted as required. The detection was carried out in 0.1 mol·L^-1 KH2PO4 (pH=3) solution, and the obtained Anodic Stripping Voltammetry (ASV) current response increased proportionally with iodide concentration in the range of 3.32×10^-7 mol·L^-1~1.57×10^-2 mol·L^-1 with a correlation coefficient of 0.9996. Compared with the commercial iodide selective electrode, it is more sensitive especially at lower concentrations.