Voltammetric Quantification of Paraquat and Glyphosate in Surface Waters
The indiscriminate use of pesticides on crops has a negative environmental impact that affects organisms, soil and water resources, essential for life. Therefore, it is necessary to evaluate the residual effect of these substances in water sources. A simple, affordable and accessible electrochemical...
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Corporación colombiana de investigación agropecuaria - AGROSAVIA
2018
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| Acceso en línea: | http://revista.corpoica.org.co/index.php/revista/article/view/510 http://hdl.handle.net/20.500.12324/33991 |
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Corporación Colombiana de Investigación Agropecuaria |
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Español |
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Transversal Alza-Camacho, William Roberto García-Colmenares, José Mauricio Chaparro-Acuña, Sandra Patricia Voltammetric Quantification of Paraquat and Glyphosate in Surface Waters |
| description |
The indiscriminate use of pesticides on crops has a negative environmental impact that affects organisms, soil and water resources, essential for life. Therefore, it is necessary to evaluate the residual effect of these substances in water sources. A simple, affordable and accessible electrochemical method for Paraquat and Glyphosate quantification in water was developed. The study was conducted using as supporting electrolyte Britton-Robinson buffer solution, working electrode of glassy carbon, Ag/AgCl as the reference electrode, and platinum as auxiliary electrode. Differential pulse voltammetry (VDP) method for both compounds were validated. Linearity of the methods presented a correlation coefficient of 0.9949 and 0.9919 and the limits of detection and quantification were 130 and 190 mg/L for Paraquat and 40 and 50 mg/L for glyphosate. Comparison with the reference method showed that the electrochemical method provides superior results in quantification of analytes. Of the samples tested, a value of Paraquat was between 0,011 to 1,572 mg/L and for glyphosate it was between 0.201 to 2.777 mg/L, indicating that these compounds are present in water sources and that those may be causing serious problems to human health. |
| format |
article |
| author |
Alza-Camacho, William Roberto García-Colmenares, José Mauricio Chaparro-Acuña, Sandra Patricia |
| author_facet |
Alza-Camacho, William Roberto García-Colmenares, José Mauricio Chaparro-Acuña, Sandra Patricia |
| author_sort |
Alza-Camacho, William Roberto |
| title |
Voltammetric Quantification of Paraquat and Glyphosate in Surface Waters |
| title_short |
Voltammetric Quantification of Paraquat and Glyphosate in Surface Waters |
| title_full |
Voltammetric Quantification of Paraquat and Glyphosate in Surface Waters |
| title_fullStr |
Voltammetric Quantification of Paraquat and Glyphosate in Surface Waters |
| title_full_unstemmed |
Voltammetric Quantification of Paraquat and Glyphosate in Surface Waters |
| title_sort |
voltammetric quantification of paraquat and glyphosate in surface waters |
| publisher |
Corporación colombiana de investigación agropecuaria - AGROSAVIA |
| publishDate |
2018 |
| url |
http://revista.corpoica.org.co/index.php/revista/article/view/510 http://hdl.handle.net/20.500.12324/33991 |
| work_keys_str_mv |
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1808104650450141184 |
| spelling |
RepoAGROSAVIA339912023-05-13T03:00:31Z Voltammetric Quantification of Paraquat and Glyphosate in Surface Waters Determinación voltamétrica de paraquat y glifosato en aguas superficiales Determinação voltamétrica de paraquato e glifosato em águas superficiais Alza-Camacho, William Roberto García-Colmenares, José Mauricio Chaparro-Acuña, Sandra Patricia Transversal The indiscriminate use of pesticides on crops has a negative environmental impact that affects organisms, soil and water resources, essential for life. Therefore, it is necessary to evaluate the residual effect of these substances in water sources. A simple, affordable and accessible electrochemical method for Paraquat and Glyphosate quantification in water was developed. The study was conducted using as supporting electrolyte Britton-Robinson buffer solution, working electrode of glassy carbon, Ag/AgCl as the reference electrode, and platinum as auxiliary electrode. Differential pulse voltammetry (VDP) method for both compounds were validated. Linearity of the methods presented a correlation coefficient of 0.9949 and 0.9919 and the limits of detection and quantification were 130 and 190 mg/L for Paraquat and 40 and 50 mg/L for glyphosate. Comparison with the reference method showed that the electrochemical method provides superior results in quantification of analytes. Of the samples tested, a value of Paraquat was between 0,011 to 1,572 mg/L and for glyphosate it was between 0.201 to 2.777 mg/L, indicating that these compounds are present in water sources and that those may be causing serious problems to human health. El uso indiscriminado de plaguicidas en los cultivos genera un impacto ambiental negativo que afecta a los organismos vivos, al suelo y al recurso hídrico. Por lo tanto, es necesario evaluar la residualidad de este tipo de sustancias en fuentes de agua que sirven como abastecimiento para la comunidad, los animales y las labores agrícolas. Con base en esto, se plantea una metodología electroquímica sencilla, económica y asequible para la cuantificación de paraquat y glifosato en las fuentes hídricas aledañas a los cultivos de papa de tres veredas del municipio de Ventaquemada (Boyacá). El estudio fue realizado usando como electrolito de soporte la solución buffer Britton-Robinson, un electrodo de trabajo de carbón vítreo, Ag/AgCl como electrodo de referencia y platino como electrodo auxiliar. Se validaron los métodos de voltametría de onda cuadrada (VOC) para ambos compuestos, los cuales presentaron un potencial de -650 y -545 mV, respectivamente. La linealidad de los métodos presentó un coeficiente de correlación de 0,9949 y 0,9919. Los límites de detección y cuantificación fueron de 130 y 190 μg/L para paraquat y de 40 y 50 μg/L para glifosato. De las muestras evaluadas se obtuvo un valor de paraquat entre 0,011 y 1,572 mg/L, y de glifosato entre 0,201 y 2,777 mg/L, lo que indica que estos compuestos están presentes en las fuentes hídricas cercanas a los cultivos y que pueden estar causando serios inconvenientes a la salud humana. O uso indiscriminado de praguicidas nas culturas gera um impacto ambiental negativo que afeta aos organismos vivos, ao solo e ao recurso hídrico. Pelo tanto, é preciso avaliar a residualidade deste tipo de substâncias em fontes de água que são utilizados como fornecimento para a comunidade, os animais e as labores agrícolas. Com base em isto, sugere-se uma metodologia eletroquímica simples, económica e acessível para a quantificação de paraquato e glifosato nas fontes hídricas próximas às culturas de batata de três veredas do municipio de Ventaquemada (Boyacá). O estudo foi realizado usando como eletrólito de suporte a solução buffer Britton-Robinson, o eletrodo de trabalho de carvão vítreo, Ag/AgCl como eletrodo de referência e platino como eletrodo auxiliar. Validaram-se os métodos de voltametria de onda quadrada (VOC) para ambos compostos, os quais apresentaram um potencial de -650 e -545 mV, respectivamente. A linearidade dos métodos apresentou um coeficiente de correlação de 0,9949 e 0,9919. Os limites de detecção e quantificação foram de 130 e 190 μg/L para paraquato e de 40 e 50 μg/L para glifosato. Das amostras avaliadas se obteve um valor de paraquato entre 0,011 e 1,572 mg/L, e de glifosato entre 0,201 e 2,777 mg/L, o que indica que estes compostos estão presentes nas fontes hídricas próximas aos cultivos e que podem estar causando sérios inconvenientes à saúde humana. 2018-11-06T20:41:40Z 2018-11-06T20:41:40Z 2016 article Artículo científico http://purl.org/coar/resource_type/c_2df8fbb1 info:eu-repo/semantics/article https://purl.org/redcol/resource_type/ART http://purl.org/coar/version/c_970fb48d4fbd8a85 http://revista.corpoica.org.co/index.php/revista/article/view/510 10.21930/rcta.vol17_num3_art:510 http://hdl.handle.net/20.500.12324/33991 reponame:Biblioteca Digital Agropecuaria de Colombia repourl:https://repository.agrosavia.co instname:Corporación colombiana de investigación agropecuaria AGROSAVIA spa http://revista.corpoica.org.co/index.php/revista/article/view/510/408 Attribution-NonCommercial-ShareAlike 4.0 International http://creativecommons.org/licenses/by-nc-sa/4.0/ info:eu-repo/semantics/openAccess application/pdf application/pdf Colombia Corporación colombiana de investigación agropecuaria - AGROSAVIA Revista Ciencia y Tecnología Agropecuaria; Vol 17 No 3 (2016); 331-345 |