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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.)

SERS detection of prometryn herbicide based on its optimized adsorption on Ag nanoparticles

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Author(s):
Rubira, R. J. G. [1] ; Furini, L. N. [2] ; Constantino, C. J. L. [1] ; Sanchez-Cortes, S. [3]
Total Authors: 4
Affiliation:
[1] Sao Paulo State Univ Unesp, Sch Sci & Technol, BR-19060900 Presidente Prudente, SP - Brazil
[2] Univ Fed Santa Catarina, Dept Fis, BR-88040900 Florianopolis, SC - Brazil
[3] CSIC, IEM, Inst Estructura Mat, Serrano 121, E-28006 Madrid - Spain
Total Affiliations: 3
Document type: Journal article
Source: VIBRATIONAL SPECTROSCOPY; v. 114, MAY 2021.
Web of Science Citations: 1
Abstract

The large use of herbicides applied in the control of agricultural pests has become a serious environmental problem. One of the concerns is the long persistence of these contaminants in soil and wastewater leading to the need of developing detection and quantification techniques. In this work, we applied surface-enhanced Raman scattering to detect prometryn herbicide using silver nanoparticles at low concentrations (ppb - parts per billion). The adsorption of prometryn on metallic surfaces was studied at different pH in order to optimize the interaction mechanism with the metal. The effect of pH is especially strong on prometryn, since it undergoes a chemical change at pH < 5 consisting in an hydroxylation of the triazine ring that leads to the hydroxylated prometryn. Thus, the quantitative analysis of prometryn was done at neutral and alkaline pH, at which prometryn interacts with the metal surface through the formation of coordination charge-transfer bonds. The detection of prometryn led to limit of detection of 1.2 x 10- 7 mol/L (28 ppb) at pH 11 and 5.3 x 10- 7 mol/L (128 ppb) at pH 7. The limit of detection at pH 11 is comparable to the concentration allowed to PRM in potable water by regulating organizations. (AU)

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
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: 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