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Fabrication of a chemically modified electrode containing 12-molybdophosphoric acid by the sol–gel technique and its application as an amperometric detector for iodate

Authors
  • Song, Wenbo
  • Chen, Xu
  • Jiang, Yanxia
  • Liu, Ying
  • Sun, Changqing
  • Wang, Xiaohong
Type
Published Article
Journal
Analytica Chimica Acta
Publisher
Elsevier
Publication Date
Jan 01, 1999
Accepted Date
Mar 29, 1999
Volume
394
Issue
1
Pages
73–80
Identifiers
DOI: 10.1016/S0003-2670(99)00288-3
Source
Elsevier
Keywords
License
Unknown

Abstract

Novel sol–gel glass thin films containing 12-molybdophosphoric acid were achieved on the surface of a glassy carbon electrode by the sol–gel technique. The electrochemical behavior of the modified electrode was studied in detail. The new chemically modified electrode was shown to exhibit a high electrocatalytic response for the reduction of iodate. Iodate in table salt was determined amperometrically in pH 2.6 acidic aqueous solution at the modified electrode with satisfactory results. The method had a linear range from 5×10 −6 to 6×10 −3 M and a detection limit of 1×10 −6 M (signal-to-noise ratio 3).

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