Electrochemical sensor for bisphenol A based on a nanoporous polymerized ionic liquid interface
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- 作者：Ming Ma (1)
Xiaojing Tu (2)
Guoqing Zhan (2)
Chunya Li (2)
Shenghui Zhang (3) - 关键词：Ionic liquid ; Polymer ; Bisphenol A ; Sensor ; Voltammetry
- 刊名：Microchimica Acta
- 出版年：2014
- 出版时间：April 2014
- 年：2014
- 卷：181
- 期：5-6
- 页码：565-572
- 全文大小：387 KB
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Xiaojing Tu (2)
Guoqing Zhan (2)
Chunya Li (2)
Shenghui Zhang (3)
1. Ningbo Entry–Exit Inspection and Quarantine Bureau of P.R.C., Ningbo, 315012, China
2. Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan, 430074, China
3. Key Laboratory of Biologic Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China - ISSN：1436-5073
文摘
The ionic liquid 1-butyl -3-[3-(N-pyrrole)-propyl]imidazolium tetrafluoroborate was employed to fabricate a glassy carbon electrode (GCE) modified with a porous film of a polymerized ionic liquid. The resulting film electrode was treated with sodium dodecyl sulfonate solution to exchange the terafluoroborate anions by dodecyl sulfonate groups. This was confirmed by X-ray photoelectron spectroscopy. The morphology of the modified GCE was characterized by scanning electron microscopy and revealed a nanoporous surface. The electrochemical properties of this film electrode were studied by electrochemical impedance spectroscopy using the hexacyanoferrate(II/III) system as an electroactive probe. The response to bisphenol A was investigated by voltammetry. Compared to the unmodified GCE, the oxidation potential is positively shifted, and the oxidation peak current is strongly increased. Experimental conditions were optimized and resulted in an oxidation peak current that is linearly related to concentration of bisphenol A in the 10 nM to ~ 10?μM range. The detection limit is 8.0 nM (at S/N--). The electrode was successfully applied to the determination of bisphenol A in leachates of plastic drinking bottles, and its accuracy was verified by independent assays via HPLC. Figure A poly{1 -butyl -3 -[3 -(N -pyrrole)propyl] imidazolium dodecyl sulfonate ionic liquid} nanoprous film electrode was fabricated with potential step technique and anionic exchange. The obtained polymerized ionic liquid film electrode was demonstrated possessing enhanced effects for bisphenol A determination.