Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11031413 | Sensing and Bio-Sensing Research | 2018 | 29 Pages |
Abstract
An electrochemical sensor was developed based on graphen oxide-polypyrrole modified glassy carbon electrode (GO/PPy/GCE) for sensitive determination of phenothrin in fruit samples. GO/PPy/GCE was characterized by scanning electron microscopy (SEM), Fourier Transform Infrared Spectroscopy (FT-IR), Ultraviolet-Visible spectroscopy (UV-Vis) and Raman spectroscopy. The sensor was also characterized using electrochemical impedance spectroscopy and cyclic voltammetry. Compared to bare GCE, GO/GCE and PPy/GCE, the reduction peak current of phenothrin increased significantly at GO/PPy/GCE, demonstrating that GO/PPy/GCE exhibited electrocatalytic activity towards the reduction of phenothrin. Under the optimal conditions, the sensor showed a linear relationship over the range of 2.5â¯Ãâ¯10â8-2.0â¯Ãâ¯10â5 M with detection limits of 13.8â¯Ãâ¯10â9 M. In addition, the analytical application of the proposed method was carried out by the determination of phenothrin in fruit juice samples.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Molla Tefera, Merid Tessema, Shimelis Admassie, Emmanuel I. Iwuoha, Tesfaye T. Waryo, Priscilla G.L. Baker,