Journal
ELECTROANALYSIS
Volume 24, Issue 7, Pages 1647-1654Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201200085
Keywords
Functional abietic-type acids; Quinine; UV spectrometric methods; Molecular imprinted sensors; Tonic water
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Funding
- National Natural Science Foundation of China [21065001, 30960306]
- Natural Science Foundation of Guangxi Province, China [0639025, 0991084, 0991001z]
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products of Guangxi Province, China [GXFC08-06]
- Education Department of Guangxi Province, China [200812 MS074]
- Guangxi University for Nationalities [gxun-chx2011086]
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A novel cross-linker (functional abietic-type acids) for preparing highly sensitive, molecularly imprinted sensors was proposed for quinine determination. A MIP film was created on a glassy carbon electrode for determination of quinine using free radical polymerization method. The modification procedure was characterized via electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The interaction between functional monomer and target molecule was observed by UV spectrometric methods. Under the optimal experimental conditions, the peak currents were proportional to the concentrations of quinine in the range from 8.0x10-7 to 2.6x10-4 M with a detection limit of 2.0x10-8 M. Meanwhile the prepared sensor showed sensitive and selective binding sites for quinine. Determination of quinine in tonic water showed good recovery.
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