Loading...

ThThnated Development of a pH assisted AgNP-based colorimetric sensor Array for simultaneous identification of phosalone and azinphosmethyl pesticides

Orouji, A ; Sharif University of Technology | 2019

1007 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.saa.2019.04.074
  3. Publisher: Elsevier B.V , 2019
  4. Abstract:
  5. Development of simple and rapid methods for identification of pesticides, due to their broad usage and harmful effects on mammals, has been known as a critical demand. Herein, we have introduced a silver nanoparticle (AgNP)based colorimetric sensor array for simultaneous identification of Azinphosmethyl (AM)and Phosalone (PS)pesticides. In the presence of the target pesticides, unmodified AgNPs at various pHs (4.5, 5.5 and 9.5)showed different aggregation behaviors. As a result of aggregation, the color and UV–Vis spectra of AgNPs changed differentially, leading to distinct response 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 then evaluated by identifying the target pesticides in apple samples. Altogether, the developed AgNPs based colorimetric sensor array can be potentially exploited as an efficient discrimination tool in the near future for agrichemical applications. © 2019 Elsevier B.V
  6. Keywords:
  7. Sensor array ; Color ; Colorimetry ; Discriminant analysis ; Mammals ; Metal nanoparticles ; Sensor arrays ; Silver nanoparticles ; Aggregation behavior ; Colorimetric ; Colorimetric sensor arrays ; Linear discriminant analysis ; Organophosphate pesticides ; Response patterns ; Simultaneous identification ; Spectral change ; Pesticides ; Azinphos methyl ; Metal nanoparticle ; Pesticide ; Phosalone ; Phosphorothioic acid derivative ; Chemistry ; Malus ; PH ; Procedures ; Azinphosmethyl ; Hydrogen-Ion Concentration ; Organothiophosphorus Compounds ; Silver ; Food contamination
  8. Source: Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy ; Volume 219 , 2019 , Pages 496-503 ; 13861425 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S138614251930455X?via%3Dihub