Design of Colorimetric Sensor Array for Simultanous Detection of Phosalone and Azinphosmethyl  Pesticides Based on Aggregation Silver Nanoparticles (AgNPs)

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Orouji, Afsaneh | 2018

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 51471 (03)
University: Sharif University of Technology
Department: Chemistry
Advisor(s): Hormozinezhad, Mohammad Reza
Abstract:
Development of simple and rapid approaches for identification of pesticides has been known as a critical demand, due to the broad usage of pesticides and their harmful effects on mammals. Herein, we have introduced a silver nanoparticle (AgNP) based colorimetric sensor array for simultaneous identification of Azinphosmethyl (AM) and Phosalone (PS). In the presence of the target pesticides, unmodified AgNPs at various pHs (4.5, 5.5 and 9.5) showed different aggregation behaviours. As a result of aggregation, the color and UV-Vis spectra of AgNPs changed which led to distinct patterns for AM and PS. The aggregation induced spectral changes of AgNPs were used to identify AM and PS with the help of linear discriminant analysis (LDA). The applicability of the proposed sensor array was evaluated by identifying the target pesticides in apple samples. Altogether, the developed AgNP based colorimetric sensor array can be potentially exploited as an efficient discrimination tool in the near future for agrichemical applications
Keywords:
Silver Nanoparticles ; Colorimetric ; Sensors Array ; Azinphos Methyl ; Agricultural Products ; Aggregation Treatment ; Phosalone Pesticide (PS)

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