Dos métodos para la cuantificación de paraquat en plaguicidas tipo Concentrado Soluble
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Abstract
En Costa Rica, el paraquat es el tercer plaguicida más importado y se aplica ampliamente en diferentes cultivos. Esto hace necesario un estricto control de calidad para el cumplimiento de la normativa local. Objetivo: Verificar y comparar los métodos estándar AOAC 969.09 por espectrometría UV-Vis y el respectivo método CIPAC por HPLC. Método: Se siguieron los lineamientos descritos por el Organismo de Acreditación de Costa Rica (ECA) para verificar los parámetros de desempeño analítico en métodos estandarizados. Resultados: Los métodos UV y HPLC demostraron ser adecuados, pero tuvieron diferencias significativas en sus resultados. Conclusiones: Ambas metodologías cumplen con los requisitos, pero recomendamos una prueba ampliada con más analistas y laboratorios para definir cuál es más precisa.
Two methods for the quantification of paraquat Soluble Concentrate pesticides”. Introduction: In Costa Rica, paraquat is the third most imported pesticide and it is widely applied in different plantations. This makes it necessary to have a strict quality control for compliance with local regulations Objective: To verify and compare AOAC standard methods 969.09 by UV-Vis spectrometry and the respective CIPAC method by HPLC. Method: The guidelines described by the Costa Rican Accreditation Body (ECA) were followed to verify analytical performance parameters in standardized methods. Results: The UV and HPLC methods proved suitable but had significant differences in the results. Conclusions: Both methodologies comply with the requirements but we recommend an enlarged test with more analysts and laboratories to define which is more accurate.
Two methods for the quantification of paraquat Soluble Concentrate pesticides”. Introduction: In Costa Rica, paraquat is the third most imported pesticide and it is widely applied in different plantations. This makes it necessary to have a strict quality control for compliance with local regulations Objective: To verify and compare AOAC standard methods 969.09 by UV-Vis spectrometry and the respective CIPAC method by HPLC. Method: The guidelines described by the Costa Rican Accreditation Body (ECA) were followed to verify analytical performance parameters in standardized methods. Results: The UV and HPLC methods proved suitable but had significant differences in the results. Conclusions: Both methodologies comply with the requirements but we recommend an enlarged test with more analysts and laboratories to define which is more accurate.
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Plaguicidas, paraquat, metodología, verificación, control de calidad, Pesticides, paraquat, methodology, verification, quality control