2026-04-28T17:08:47Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/74342023-03-28T11:38:40Zcom_10259_3844com_10259_5086com_10259_2604com_10259_4363com_10259_3843com_10259_3591com_10259.4_106col_10259_3845col_10259_4364col_10259_6162

Raman spectroelectrochemical determination of clopyralid in tap water Pérez Estébanez, Martín Cheuquepan Valenzuela, William Huidobro Lago, María Cuevas Vicario, José Vicente Hernández Muñoz, Sheila Heras Vidaurre, Aránzazu Colina Santamaría, Álvaro Spectroelectrochemistry EC-SOERS SERS Raman Herbicides Química analítica Chemistry, Analytic Clopyralid is a common herbicide used all around the world that can be dissolved in the rain stream and accumulate in underground water with the potential threat of reaching drinking water. Many methodologies have been proposed to perform quantitative analysis of this compound but, to this day, no Raman detection of clopyralid has been carried out. Here, a novel methodology to quantify clopyralid, based on Electrochemical Surface Oxidation-Enhanced Raman Scattering (EC-SOERS), is developed, using disposable silver screen-printed electrodes as substrate. The optimization of the electrolytic media is carried out, searching for the conditions where a maximum Raman enhancement is obtained. Moreover, a study about the effect of various interfering compounds, which could be present in water, on the clopyralid Raman response is performed. The results demonstrate that the presented methodology allows the determination of clopyralid in the micromolar range in tap water without any purification or preconcentration step, requiring few minutes to perform the measurement of each sample. Authors acknowledge Ministerio de Ciencia e Innovación and Agencia Estatal de Investigación (MCIN/AEI/10.13039/501100011033, PID2020-113154RB-C21), Junta de Castilla y León (Grant BU297P18) and Ministerio de Ciencia, Innovación y Universidades (RED2018–102412-T) for the support of this work. Martín Perez and Sheila Hernández acknowledge Junta de Castilla y Leon for their predoctoral contracts. 2023-02-08T13:23:49Z 2023-02-08T13:23:49Z 2022-12 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 0026-265X http://hdl.handle.net/10259/7434 10.1016/j.microc.2022.108018 eng Microchemical Journal. 2022, V. 183, 108018 https://doi.org/10.1016/j.microc.2022.108018 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-113154RB-C21/ES/APLICACION DE NUEVOS MATERIALES Y DISPOSITIVOS PARA EC-SERS Y EC-SOERS/ info:eu-repo/grantAgreement/Junta de Castilla y León//BU297P18//Fusión de técnicas espectroelectroquímicas avanzadas/ info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RED2018-102412-T/ES/RED DE SENSORES Y BIOSENSORES ELECTROQUIMICOS/ Atribución 4.0 Internacional http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess application/pdf Elsevier