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PubMed · 15142574

Ionic liquid ethanol sensor.

Yuan Gee Lee·Tse-Chuan Chou
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Abstract

Ionic liquids containing lithium methylsulfonyl group were prepared from the precursors poly(propylene glycol)-block-(ethylene glycol)-block-(propylene glycol)-bis(2-aminopropyl ether) with different molecular weight. These liquids revealed excellent electrical conductivity in the temperature range -25 to 85 degrees C. Also, they exhibited a high boiling temperature and hence a low vapor pressure in ambient condition. Additionally, they showed a high fluidity with their viscosities being comparative with that of water. To determine the sensitivity of an ethanol sensor by using these ionic liquids, these liquids were subjected into a sequential electrochemical tests with nickel electrodes which performed a high sensitivity for the ethanol sensor. It was found that only the derivative with low molecular weight could detect ethanol. Furthermore, a linear relationship between the response current and the concentration of ethanol was constructed. The detection limit was found to be 0.13% (v/v) and its response time was 336 s.

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Biosensing TechniquesComplex MixturesElectrochemistryElectrodesElectrolytesEquipment DesignEquipment Failure AnalysisEthanolIonsLithium CompoundsNickelOxidation-ReductionReproducibility of ResultsSensitivity and SpecificitySolutionsTransducersEvaluation StudyJournal ArticleResearch Support, Non-U.S. Gov'tValidation Study

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BibTeXRIS

Yuan Gee Lee, Tse-Chuan Chou. 2004-07-30. Ionic liquid ethanol sensor.. https://doi.org/10.1016/j.bios.2004.01.026

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