β-cyclodextrin non-covalently modified ionic liquid-based carbon paste electrode as a novel voltammetric sensor for specific detection of bisphenol A
| Autor: | Xiaowei Yu, Fengxiang Tang, Xiaoping Wu, Yankai Chen, Ling Zhou, Luping Chang |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Detection limit
Materials science Cost effectiveness Metals and Alloys Analytical chemistry Conductivity Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Carbon paste electrode Dielectric spectroscopy chemistry.chemical_compound chemistry Chemical engineering Ionic liquid Electrode Materials Chemistry Electrical and Electronic Engineering Instrumentation Voltammetry |
| Zdroj: | Sensors and Actuators B: Chemical. 186:648-656 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2013.06.089 |
| Popis: | A highly effective approach was developed for specific detection of bisphenol A (BPA) in real samples, based on a β-cyclodextrin (β-CD) modified ionic liquid-based carbon paste electrode (β-CD/ILCPE). Voltammetry and electrochemical impedance spectroscopy measurements reveal significantly improvements in the conductivity and compatibility of the sensor, when using an ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF 4 ) as a super conductive binder in the composition of carbon paste. The introduction of β-CD as a modifier as well as a host molecule exhibited obviously enhanced sensitivity and selectivity toward BPA over a wide concentration range of 1.0 × 10 −7 to 1.1 × 10 −5 mol L −1 , with a detection limit (S/N = 3) of 8.3 × 10 −8 mol L −1 . Compared to classic carbon paste electrodes, the BPA sensor not only possesses the inherent reusability and cost effectiveness, but also shows better sensing performance and stability. This can be attributed to the combination of the high ion conductivity and non-covalently interaction properties of BMIMBF 4 , and the supramolecular recognition and enrichment capability of β-CD. The mechanism of electrode processes was also presented. The proposed sensor was successfully used in the determination of BPA in real samples with good recovery. |
| Databáze: | OpenAIRE |
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