Ionic Liquid‐Carbon Nanotube Modified Screen‐Printed Electrodes and Their Potential for Adsorptive Stripping Voltammetry |
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| Authors: | Patrick Gan John S Foord Richard G Compton |
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| Affiliation: | 1. Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK;2. Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford, OX1 3QZ, UK fax: +44 (0) 1865 275410;3. tel: +44 (0) 1865 275957. |
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| Abstract: | Compared with paraffin oil, the use of ionic liquids as a binder in carbon paste type electrodes was shown to greatly enhance the accumulation of analytes, as illustrated with 17α‐ethynylestradiol as a model. The ionic “liquid” n‐octyl‐pyridinium hexafluorophosphate C8py]PF6] was most efficient among several ionic liquids investigated. Such preconcentration allowed a C8py]PF6]‐multiwalled carbon nanotubes (MWCNTs) (95 : 5 w/w) composite electrode to be useful for adsorptive stripping voltammetry. Screen‐printed electrodes modified with C8py]PF6]‐MWCNTs were developed and were able to achieve high sensitivity during adsorptive stripping voltammetric measurements under optimised conditions. |
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| Keywords: | Ionic liquid Screen‐printed electrodes Carbon nanotubes 17α ‐Ethynylestradiol |
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