Electrochemical determination of capsaicin by ionic liquid composite-modified electrode

Dong Hwan Kim, Sungju Nam, Jaeyoon Kim, Won Yong Lee

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

An electrochemical detection method for capsaicin has been developed using ionic liquid (IL) doped graphene-titania-Nafion composite-modified electrode. The combination of IL (1-hexyl-3-methylimidazolium with hexafluorophosphate counter ion) in the composite-modified electrode resulted in a significantly increased electrochemical response for capsaicin compared to that obtained at the corresponding electrode without IL. The increased electrochemical signal could be ascribed to the decreased electron transfer resistance through the composite film and also to the effective accumulation of capsaicin on the electrode surface due to π-π interaction of the imidazole groups of IL with the aromatic rings of capsaicin. The present IL composite-modified electrode can detect capsaicin with a concentration range from 3.0 × 10 M to 1.0 × 10 M with a detection limit of 3.17 × 10-8M (S/N = 3). The present sensor showed good reproducibility (RSD = 3.2%).-5-9.

Original languageEnglish
Pages (from-to)177-184
Number of pages8
JournalJournal of Electrochemical Science and Technology
Volume10
Issue number2
DOIs
Publication statusPublished - 2019 Jun

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Ionic Liquids
Capsaicin
Ionic liquids
Electrodes
Composite materials
Radiation counters
Graphite
Composite films
Graphene
Titanium
Electrons
Sensors

All Science Journal Classification (ASJC) codes

  • Electrochemistry

Cite this

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abstract = "An electrochemical detection method for capsaicin has been developed using ionic liquid (IL) doped graphene-titania-Nafion composite-modified electrode. The combination of IL (1-hexyl-3-methylimidazolium with hexafluorophosphate counter ion) in the composite-modified electrode resulted in a significantly increased electrochemical response for capsaicin compared to that obtained at the corresponding electrode without IL. The increased electrochemical signal could be ascribed to the decreased electron transfer resistance through the composite film and also to the effective accumulation of capsaicin on the electrode surface due to π-π interaction of the imidazole groups of IL with the aromatic rings of capsaicin. The present IL composite-modified electrode can detect capsaicin with a concentration range from 3.0 × 10 M to 1.0 × 10 M with a detection limit of 3.17 × 10-8M (S/N = 3). The present sensor showed good reproducibility (RSD = 3.2{\%}).-5-9.",
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Electrochemical determination of capsaicin by ionic liquid composite-modified electrode. / Kim, Dong Hwan; Nam, Sungju; Kim, Jaeyoon; Lee, Won Yong.

In: Journal of Electrochemical Science and Technology, Vol. 10, No. 2, 06.2019, p. 177-184.

Research output: Contribution to journalArticle

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AU - Kim, Dong Hwan

AU - Nam, Sungju

AU - Kim, Jaeyoon

AU - Lee, Won Yong

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