Electrochemical determination of phenothrin in fruit juices at graphene oxide-polypyrrole modified glassy carbon electrode

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), Ul...

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Main Authors:	Molla Tefera, Merid Tessema, Shimelis Admassie, Emmanuel I. Iwuoha, Tesfaye T. Waryo, Priscilla G.L. Baker
Format:	Article
Language:	English
Published:	Elsevier 2018-11-01
Series:	Sensing and Bio-Sensing Research
Online Access:	http://www.sciencedirect.com/science/article/pii/S2214180418300242

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spelling	doaj-2cd478b5ae6744ef8265b377d2a1507f2020-11-25T01:14:56ZengElsevierSensing and Bio-Sensing Research2214-18042018-11-01212734Electrochemical determination of phenothrin in fruit juices at graphene oxide-polypyrrole modified glassy carbon electrodeMolla Tefera0Merid Tessema1Shimelis Admassie2Emmanuel I. Iwuoha3Tesfaye T. Waryo4Priscilla G.L. Baker5Department of Chemistry, University of Gondar, P. O. Box 196, Gondar, EthiopiaDepartment of Chemistry, Addis Ababa University, P. O. Box 1176, Addis Ababa, EthiopiaDepartment of Chemistry, Addis Ababa University, P. O. Box 1176, Addis Ababa, EthiopiaSensor Lab, Department of Chemistry, University of the Western Cape, Private Bag X17, Robert Sobukwe Drive, Bellville 7535, South AfricaSensor Lab, Department of Chemistry, University of the Western Cape, Private Bag X17, Robert Sobukwe Drive, Bellville 7535, South AfricaSensor Lab, Department of Chemistry, University of the Western Cape, Private Bag X17, Robert Sobukwe Drive, Bellville 7535, South Africa; Corresponding author.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 2.5 × 10−8-2.0 × 10−5 M with detection limits of 13.8 × 10−9 M. In addition, the analytical application of the proposed method was carried out by the determination of phenothrin in fruit juice samples. Keywords: Phenothrin, Graphene oxide-polypyrrole, Sensor, Fruit juiceshttp://www.sciencedirect.com/science/article/pii/S2214180418300242
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Molla Tefera Merid Tessema Shimelis Admassie Emmanuel I. Iwuoha Tesfaye T. Waryo Priscilla G.L. Baker
spellingShingle	Molla Tefera Merid Tessema Shimelis Admassie Emmanuel I. Iwuoha Tesfaye T. Waryo Priscilla G.L. Baker Electrochemical determination of phenothrin in fruit juices at graphene oxide-polypyrrole modified glassy carbon electrode Sensing and Bio-Sensing Research
author_facet	Molla Tefera Merid Tessema Shimelis Admassie Emmanuel I. Iwuoha Tesfaye T. Waryo Priscilla G.L. Baker
author_sort	Molla Tefera
title	Electrochemical determination of phenothrin in fruit juices at graphene oxide-polypyrrole modified glassy carbon electrode
title_short	Electrochemical determination of phenothrin in fruit juices at graphene oxide-polypyrrole modified glassy carbon electrode
title_full	Electrochemical determination of phenothrin in fruit juices at graphene oxide-polypyrrole modified glassy carbon electrode
title_fullStr	Electrochemical determination of phenothrin in fruit juices at graphene oxide-polypyrrole modified glassy carbon electrode
title_full_unstemmed	Electrochemical determination of phenothrin in fruit juices at graphene oxide-polypyrrole modified glassy carbon electrode
title_sort	electrochemical determination of phenothrin in fruit juices at graphene oxide-polypyrrole modified glassy carbon electrode
publisher	Elsevier
series	Sensing and Bio-Sensing Research
issn	2214-1804
publishDate	2018-11-01
description	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 2.5 × 10−8-2.0 × 10−5 M with detection limits of 13.8 × 10−9 M. In addition, the analytical application of the proposed method was carried out by the determination of phenothrin in fruit juice samples. Keywords: Phenothrin, Graphene oxide-polypyrrole, Sensor, Fruit juices
url	http://www.sciencedirect.com/science/article/pii/S2214180418300242
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Electrochemical determination of phenothrin in fruit juices at graphene oxide-polypyrrole modified glassy carbon electrode

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