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- Title
Electrochemical analysis of parathion-ethyl using zirconium oxide-laponite nanocomposites-modified glassy carbon electrode.
- Authors
Bui, Minh-Phuong; Seo, Seong
- Abstract
A simple, cost-effective electrode surface modified with a mixture of laponite clay and zirconium oxide (laponite-ZrO) gel nanocomposites has been developed for the detection of parathion-ethyl pesticide. Different composition ratios of laponite-ZrO gel were used to modify the surface of glassy carbon (GC) electrode. The fabricated electrode was characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, and attenuated total internal reflectance infrared spectroscopy. Cyclic voltammetry and differential pulse voltammetry were employed to investigate the modified laponite-ZrO electrode toward the electrochemical oxidation of several organophosphate compounds. The obtained results showed that the laponite-ZrO nanocomposites-modified GC electrodes have improved the sensitivity and selectivity of parathion-ethyl detection with a limit of detection as low as 1.6 ng mL in the linear range of 0-58.3 ng mL ( R = 0.994). Furthermore, the modified electrodes showed good stability at 71.6 ± 3.2 % after 14 days with the relative standard deviation of 4.36 % ( n = 20).
- Subjects
PESTICIDE testing; PARATHION; NANOCOMPOSITE materials; CARBON electrodes; ENERGY dispersive X-ray spectroscopy
- Publication
Journal of Applied Electrochemistry, 2015, Vol 45, Issue 4, p365
- ISSN
0021-891X
- Publication type
Article
- DOI
10.1007/s10800-015-0789-0