Otimização e validação de método empregando quechers modificado e lc-esi-ms/ms para determinação de agrotóxicos em cebola
AUTOR(ES)
Rodrigues, Sherol Acosta, Caldas, Sergiane Souza, Furlong, Eliana Badiale, Primel, Ednei Gilberto, Zanella, Renato
FONTE
Química Nova
DATA DE PUBLICAÇÃO
2011
RESUMO
An evaluation of the pesticides extraction from onion using a modern sample preparation method (QuEChERS) and determination by liquid chromatography tandem mass spectrometry was carried out. All the calibration curves showed r>0.99. The recoveries ranged between 61.8 and 120.0% with relative standard deviation lower than 20% for all compounds. Due to the occurrence of matrix effect, the quantification was performed using matrix-matched calibration. The limits of quantification of the method were between 0.0005 and 0.05 mg kg-1. The method shows the advantages of not require the clean-up step and consume low volume of organic solvents, decreasing time, costs and residues.
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