Methylene blue-mediated electrocatalytic detection of hexavalent chromium

Lee E. Korshoj, Anita J. Zaitouna, Rebecca Y. Lai

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

We report, for the first time, the design and fabrication of an electrochemical ion (E-ION) sensor for highly specific detection of hexavalent chromium (Cr(VI)). Unlike previously developed electrochemical Cr(VI) sensors, the sensing mechanism relies on the previously unexplored electrocatalytic reaction between Cr(VI) and surface-immobilized methylene blue (MB). The sensor is sensitive, specific, and selective enough to be used in a synthetic aquifer sample. Like many sensors of this class, it is also reagentless, reusable, and compatible with gold-plated screen-printed carbon electrodes. Despite the difference in the sensing mechanism, this E-ION Cr(VI) sensor possesses attributes similar to other MB-based electrochemical sensors, sensors with potential for real world applications.

Original languageEnglish (US)
Pages (from-to)2560-2564
Number of pages5
JournalAnalytical chemistry
Volume87
Issue number5
DOIs
StatePublished - Mar 3 2015

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Methylene Blue
Sensors
Ions
Electrochemical sensors
Aquifers
Gold
chromium hexavalent ion
Carbon
Fabrication
Electrodes

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Methylene blue-mediated electrocatalytic detection of hexavalent chromium. / Korshoj, Lee E.; Zaitouna, Anita J.; Lai, Rebecca Y.

In: Analytical chemistry, Vol. 87, No. 5, 03.03.2015, p. 2560-2564.

Research output: Contribution to journalArticle

Korshoj, Lee E. ; Zaitouna, Anita J. ; Lai, Rebecca Y. / Methylene blue-mediated electrocatalytic detection of hexavalent chromium. In: Analytical chemistry. 2015 ; Vol. 87, No. 5. pp. 2560-2564.
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