Abstract

AHUMADA F, Diego A; MOJICA, Andrea; VANOY, M. Nicolás  and  ZAMUDIO S, Adriana. Comparsion of two multiresidue methods for pesticide determination in pollen. Rev.Colomb.Quim. [online]. 2014, vol.43, n.3, pp.24-34. ISSN 0120-2804.

A comparative study between the conventional and the modified QuEChERS method was performed in order to select the methodology that works better for the determination of pesticide residues in pollen. For this study, 58 pesticides were analyzed by liquid chromatography coupled to mass spectrometry. Comparison was made using different validation parameters for each method as recovery, precision (as repeatability), limits of detection, which were estimate using different approaches. In addition, a factorial design was used to evaluate the efficiency of both methods in different types of pollen. The results showed that the modified method is appropriate for the analysis of pesticide residues in pollen. It was also found that this method has better detection limits, better accuracy and better selectivity than the conventional QuEChERS method for pesticide analysis in bee pollen. Finally, it was found that the modified method is not suitable for the analysis of three of the 58 pesticides studied.

Keywords : pesticides; QuEChERS; validation; pollen.

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