Simultaneous detection of iodine and iodide on boron doped diamond electrodes

Stéphane Fierro, Christos Comninellis, Yasuaki Einaga

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Individual and simultaneous electrochemical detection of iodide and iodine has been performed via cyclic voltammetry on boron doped diamond (BDD) electrodes in a 1 M NaClO4 (pH 8) solution, representative of typical environmental water conditions. It is feasible to compute accurate calibration curve for both compounds using cyclic voltammetry measurements by determining the peak current intensities as a function of the concentration. A lower detection limit of about 20 μM was obtained for iodide and 10 μM for iodine. Based on the comparison between the peak current intensities reported during the oxidation of KI, it is probable that iodide (I-) is ?rst oxidized in a single step to yield iodine (I2). The latter is further oxidized to obtain IO3-. This technique, however, did not allow for a reasonably accurate detection of iodate (IO3 -) on a BDD electrode.

Original languageEnglish
Pages (from-to)33-37
Number of pages5
JournalTalanta
Volume103
DOIs
Publication statusPublished - 2013 Jan 15

Keywords

  • Boron doped diamond electrodes
  • Electrochemical detection
  • Iodate
  • Iodide
  • Iodine

ASJC Scopus subject areas

  • Analytical Chemistry

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