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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Increasing the sensitivity of surface-enhanced Raman scattering detection for s-triazine pesticides by taking advantage of interactions with soil humic substances

Full text
Author(s):
Rubira, Rafael J. G. [1] ; Camacho, Sabrina A. [2, 3] ; Constantino, Carlos J. L. [1] ; Sanchez-Cortes, Santiago [4]
Total Authors: 4
Affiliation:
[1] Sao Paulo State Univ UNESP, Sch Technol & Appl Sci, Presidente Prudente - Brazil
[2] Univ Sao Paulo, Sao Carlos Inst Phys, Sao Carlos - Brazil
[3] Sao Paulo State Univ UNESP, Sch Sci Humanities & Languages, Assis - Brazil
[4] IEM CSIC, Inst Estruct Mat, Madrid - Spain
Total Affiliations: 4
Document type: Journal article
Source: Journal of Raman Spectroscopy; v. 53, n. 1 OCT 2021.
Web of Science Citations: 0
Abstract

Surface-enhanced Raman scattering (SERS) is a technique which has been well explored for detecting contaminating substances, such as pesticides. Of particular interest has been the use of SERS for quantifying trace levels of the s-triazine compounds, unraveling the adsorption mechanisms on metallic nanoparticles. Herein, we applied silver nanoparticles (AgNP) as SERS substrates for detecting commercial samples of the pesticides prometryn (PRM) and atrazine (ATZ) and their purified samples in the presence of soil humic substances (SHS). The degrading effect of SHS was assessed through the similarities between the SERS spectra of the purchased pesticides and purified pesticides in the presence of SHS. We also evaluated the mechanisms of interaction between the purified pesticide molecules and SHS. Strong interactions of the amino groups (s-triazine molecules) with the oxygenated groups (SHS) were confirmed via SERS spectra. Such interaction, which is favorable for purified pesticides, allowed to increase the sensitivity of SERS detection, reaching low limits of detection (LOD): 5.5 ppb and 4.0 ppb for unpurified PRM and ATZ (as purchased), respectively, against 1.3 ppb and 21 ppt for purified PRM and ATZ in the presence of the SHS, respectively. (AU)

FAPESP's process: 18/14692-5 - Photothermal therapy mediated by gold nanoparticles: from model systems of biomembranes toward in vitro culture of tumor cells
Grantee:Sabrina Aléssio Camacho
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 20/05423-0 - Detection of pesticides (cocktails) used in sugarcane crops and their effect on biological systems
Grantee:Rafael Jesus Gonçalves Rubira
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 18/04628-8 - Detection of triazine herbicides by SERS using silver nanoparticles synthesised via green chemistry
Grantee:Rafael Jesus Gonçalves Rubira
Support Opportunities: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 16/09634-0 - Interaction between biomembrane models based on Langmuir films and giant unilamellar vesicles (GUVs) with triazine herbicides and detection via SERS spectroscopy.
Grantee:Rafael Jesus Gonçalves Rubira
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 18/22214-6 - Towards a convergence of technologies: from sensing and biosensing to information visualization and machine learning for data analysis in clinical diagnosis
Grantee:Osvaldo Novais de Oliveira Junior
Support Opportunities: Research Projects - Thematic Grants