Detection and Identification of Paraquat and Bifenazate Pesticides in Citrus Using Gold Nanoparticle-Based Colorimetric Sensor Array
Paper ID : 1177-ICNS
Mohammadreza Mirghafouri1, Mohammad Reza Hormozi Nezhad2, Samira Abbasi-Moayed3, Forough Ghasemi *4
1Department of Chemistry, Sharif University of Technology, Tehran 11155-9516, Iran
2Department of Chemistry, Sharif University of Technology, Tehran 11155-9516, Iran‎
3Chemistry Department, Sharif University of Technology, Tehran, 11155-9516, Iran
4Department of Nanotechnology, Agricultural Biotechnology Research Institute of Iran
Development of simple and rapid methods for the identification of pesticides has been recognized as a critical need due to their broad usage and harmful effects on mammals. Here, we introduce a simple colorimetric sensor array for simultaneous identification of Paraquat (PQ) and Bifenazate (BF) pesticides, based on aggregation of two types of surface engineered gold nanoparticles (AuNPs). In the presence of the target pesticides, AuNPs with different capping showed different aggregation behaviors. As a result of aggregation, the color and UV-Vis spectra of AuNPs changed differentially, leading to distinct response patterns for PQ and BF. The aggregation-induced spectral changes of AuNPs will be used to identify PQ and BF with the help of linear discriminant analysis (LDA) and hierarchical cluster analysis (HCA). The applicability of the proposed sensor array will then evaluated by identifying the target pesticides in citrus samples. Altogether, the developed AuNPs based colorimetric sensor array can be potentially exploited as an efficient discrimination tool in the near future for agrichemical applications.
“Gold nanoparticles”, “Colorimetric sensor array”, “Paraquat”, “Bifenazate”
Status : Abstract Accepted (Poster Presentation)