Resumo

BARRANTES BARRANTES, Ericka; PEREZ LOPEZ, Esteban  e  VILLALOBOS LANDAZURI, Roberto. Two methods for the quantification of paraquat in Soluble Concentrate pesticides. Cuadernos de Investigación UNED [online]. 2020, vol.12, n.2, pp.565-576. ISSN 1659-4266.  http://dx.doi.org/10.22458/urj.v12i2.3042.

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.

Palavras-chave : Pesticides; paraquat; methodology; verification; qulity control.

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