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Open AccessArticle

Zinc/Aluminium–Quinclorac Layered Nanocomposite Modified Multi-Walled Carbon Nanotube Paste Electrode for Electrochemical Determination of Bisphenol A

1
Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Negeri Padang, West Sumatera 25171, Indonesia
2
Department of Chemistry, Faculty of Science and Mathemathics, Universiti Pendidikan Sultan Idris, Tanjong Malim 35900, Perak, Malaysia
3
Nanotechnology Research Centre, Faculty of Science and Mathemathics, Universiti Pendidikan Sultan Idris, Tanjong Malim 35900, Perak, Malaysia
4
Department of Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
*
Authors to whom correspondence should be addressed.
Sensors 2019, 19(4), 941; https://doi.org/10.3390/s19040941
Received: 7 January 2019 / Revised: 15 February 2019 / Accepted: 15 February 2019 / Published: 22 February 2019
(This article belongs to the Special Issue Sensors for Hazardous Material Detection)
This paper presents the application of zinc/aluminium-layered double hydroxide-quinclorac (Zn/Al-LDH-QC) as a modifier of multiwalled carbon nanotubes (MWCNT) paste electrode for the determination of bisphenol A (BPA). The Zn/Al-LDH-QC/MWCNT morphology was examined by a transmission electron microscope and a scanning electron microscope. Electrochemical impedance spectroscopy was utilized to investigate the electrode interfacial properties. The electrochemical responses of the modified electrode towards BPA were thoroughly evaluated by using square-wave voltammetry technique. The electrode demonstrated three linear plots of BPA concentrations from 3.0 × 10−8–7.0 × 10−7 M (R2 = 0.9876), 1.0 × 10−6–1.0 × 10−5 M (R2 = 0.9836) and 3.0 × 10−5–3.0 × 10−4 M (R2 = 0.9827) with a limit of detection of 4.4 × 10−9 M. The electrode also demonstrated good reproducibility and stability up to one month. The presence of several metal ions and organic did not affect the electrochemical response of BPA. The electrode is also applicable for BPA determination in baby bottle and mineral water samples with a range of recovery between 98.22% and 101.02%. View Full-Text
Keywords: bisphenol A; square-wave voltammetry; layered double hydroxide nanocomposite bisphenol A; square-wave voltammetry; layered double hydroxide nanocomposite
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Zainul, R.; Abd Azis, N.; Md Isa, I.; Hashim, N.; Ahmad, M.S.; Saidin, M.I.; Mukdasai, S. Zinc/Aluminium–Quinclorac Layered Nanocomposite Modified Multi-Walled Carbon Nanotube Paste Electrode for Electrochemical Determination of Bisphenol A. Sensors 2019, 19, 941.

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