Glassy Carbon Electrode Modified with C/Au Nanostructured Materials for Simultaneous Determination of Hydroquinone and Catechol in Water Matrices
The<b> </b>simultaneous determination of hydroquinone and catechol was conducted in aqueous and real samples by means of differential pulse voltammetry (DPV) using a glassy carbon electrode modified with Gold Nanoparticles (AuNP) and functionalized multiwalled carbon nanotubes by drop co...
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doaj-5ca6bba2fade4d64bbc8fc5bb3e4aae52021-04-24T23:00:55ZengMDPI AGChemosensors2227-90402021-04-019888810.3390/chemosensors9050088Glassy Carbon Electrode Modified with C/Au Nanostructured Materials for Simultaneous Determination of Hydroquinone and Catechol in Water MatricesSamuel Piña0Christian Candia-Onfray1Natalia Hassan2Paola Jara-Ulloa3David Contreras4Ricardo Salazar5Facultad de Ciencias Químicas, Universidad de Concepción (UDEC), Edmundo Larenas 129, Concepción 4070371, ChileLaboratorio de Electroquímica del Medio Ambiente, LEQMA, Facultad de Química y Biología, Universidad de Santiago de Chile (USACH), Casilla 40, Correo 33, Santiago 9160000, ChilePrograma Institucional de Fomento a la Investigación, Desarrollo e Innovación, Universidad Tecnológica Metropolitana (UTEM), Ignacio Valdivieso 2409, San Joaquín, Santiago 8940577, ChileFacultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez, Diagonal Las Torres 2640, Peñalolen, Santiago 7941169, ChileFacultad de Ciencias Químicas, Universidad de Concepción (UDEC), Edmundo Larenas 129, Concepción 4070371, ChileLaboratorio de Electroquímica del Medio Ambiente, LEQMA, Facultad de Química y Biología, Universidad de Santiago de Chile (USACH), Casilla 40, Correo 33, Santiago 9160000, ChileThe<b> </b>simultaneous determination of hydroquinone and catechol was conducted in aqueous and real samples by means of differential pulse voltammetry (DPV) using a glassy carbon electrode modified with Gold Nanoparticles (AuNP) and functionalized multiwalled carbon nanotubes by drop coating. A good response was obtained in the simultaneous determination of both isomers through standard addition to samples prepared with analytical grade water and multivariate calibration by partial least squares (PLS) in winery wastewater fortified with HQ and CT from 4.0 to 150.00 µM. A sensitivity of 0.154 µA µM<sup>−</sup><sup>1</sup> and 0.107 µA µM<sup>−1</sup>, and detection limits of 4.3 and 3.9 µM were found for hydroquinone and catechol, respectively. We verified the reliability of the developed method by simultaneously screening analytes in spiked tap water and industrial wastewater, achieving recoveries over 80%. In addition, this paper demonstrates the applicability of chemometric tools for the simultaneous quantification of both isomers in real matrices, obtaining prediction errors of lower than 10% in fortified wastewater.https://www.mdpi.com/2227-9040/9/5/88simultaneous determinationmodified electrodenanomaterialshydroquinonecatecholchemometric tool |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Samuel Piña Christian Candia-Onfray Natalia Hassan Paola Jara-Ulloa David Contreras Ricardo Salazar |
spellingShingle |
Samuel Piña Christian Candia-Onfray Natalia Hassan Paola Jara-Ulloa David Contreras Ricardo Salazar Glassy Carbon Electrode Modified with C/Au Nanostructured Materials for Simultaneous Determination of Hydroquinone and Catechol in Water Matrices Chemosensors simultaneous determination modified electrode nanomaterials hydroquinone catechol chemometric tool |
author_facet |
Samuel Piña Christian Candia-Onfray Natalia Hassan Paola Jara-Ulloa David Contreras Ricardo Salazar |
author_sort |
Samuel Piña |
title |
Glassy Carbon Electrode Modified with C/Au Nanostructured Materials for Simultaneous Determination of Hydroquinone and Catechol in Water Matrices |
title_short |
Glassy Carbon Electrode Modified with C/Au Nanostructured Materials for Simultaneous Determination of Hydroquinone and Catechol in Water Matrices |
title_full |
Glassy Carbon Electrode Modified with C/Au Nanostructured Materials for Simultaneous Determination of Hydroquinone and Catechol in Water Matrices |
title_fullStr |
Glassy Carbon Electrode Modified with C/Au Nanostructured Materials for Simultaneous Determination of Hydroquinone and Catechol in Water Matrices |
title_full_unstemmed |
Glassy Carbon Electrode Modified with C/Au Nanostructured Materials for Simultaneous Determination of Hydroquinone and Catechol in Water Matrices |
title_sort |
glassy carbon electrode modified with c/au nanostructured materials for simultaneous determination of hydroquinone and catechol in water matrices |
publisher |
MDPI AG |
series |
Chemosensors |
issn |
2227-9040 |
publishDate |
2021-04-01 |
description |
The<b> </b>simultaneous determination of hydroquinone and catechol was conducted in aqueous and real samples by means of differential pulse voltammetry (DPV) using a glassy carbon electrode modified with Gold Nanoparticles (AuNP) and functionalized multiwalled carbon nanotubes by drop coating. A good response was obtained in the simultaneous determination of both isomers through standard addition to samples prepared with analytical grade water and multivariate calibration by partial least squares (PLS) in winery wastewater fortified with HQ and CT from 4.0 to 150.00 µM. A sensitivity of 0.154 µA µM<sup>−</sup><sup>1</sup> and 0.107 µA µM<sup>−1</sup>, and detection limits of 4.3 and 3.9 µM were found for hydroquinone and catechol, respectively. We verified the reliability of the developed method by simultaneously screening analytes in spiked tap water and industrial wastewater, achieving recoveries over 80%. In addition, this paper demonstrates the applicability of chemometric tools for the simultaneous quantification of both isomers in real matrices, obtaining prediction errors of lower than 10% in fortified wastewater. |
topic |
simultaneous determination modified electrode nanomaterials hydroquinone catechol chemometric tool |
url |
https://www.mdpi.com/2227-9040/9/5/88 |
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