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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.)

Sensing Atrazine Herbicide Degradation Products through Their Interactions with Humic Substances by Surface-Enhanced Raman Scattering

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Zanasi, Giulia [1] ; Rubira, Rafael J. G. [2] ; Francioso, Ornella [1] ; Canamares, Maria Vega [3] ; Constantino, Carlos J. L. [2] ; Sanchez-Cortes, Santiago [3]
Total Authors: 6
[1] Univ Bologna, Dipartimento Sci & Tecnol Agroalimentari, Vle Fanin 40, I-40127 Bologna - Italy
[2] Sao Paulo State Univ UNESP, Sch Technol & Appl Sci, BR-19060900 Presidente Prudente, SP - Brazil
[3] Inst Estruct Mat IEM CSIC, Serrano 121, E-28006 Madrid - Spain
Total Affiliations: 3
Document type: Journal article
Source: CHEMOSENSORS; v. 9, n. 6 JUN 2021.
Web of Science Citations: 0

In this work, we have developed a simple method to carry out the quantitative analysis of deethylhydroxyatrazine (DEHA), the most abundant metabolite of atrazine herbicide (ATZ), based on the surface-enhanced Raman scattering technique. Since this ATZ product can undergo pH-dependent tautomerization, a previous characterization of the DEHA vibrational spectrum was accomplished. This study consisted of the Raman scattering study, both experimental and theoretical, of the enolic and ketonic tautomers of this molecule. SERS spectra were recorded at different pH in order to assess the effect of the metal surface in nanoparticles along with the pH on the structure of DEHA and to find the optimal experimental conditions of the quantitative detection of DEHA. Additionally, the interaction of DEHA with two types of humic acid reference standards, the Elliot humic and leonardite humic ones, was also performed by SERS. This interaction was conducted with two different objectives: to evaluate the interaction mechanism of the ATZ degradation product with humic substances and to check if this interaction can modify the sensitivity of the SERS detection of DEHA. The results presented in this study have clearly demonstrated that SERS spectroscopy is a very powerful technique for characterizing DEHA and other triazine sub-products at a very low concentration in water and also for analyzing the interaction of these important pollutants with humic substances. (AU)

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: 18/04628-8 - 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: 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