Uncertainty calculation in the quantitation of organoclorine and triazole pesticides in green coffee by gc-ms
Abstract
Implementation of a multiresidue methodology for the determination of organochlorine and triazole pesticides in green coffee is described. Pesticides were extracted with a mixture of acetonitrile-water (5:2), followed by liquid -liquid partition and solid-phase extraction with reversed phase RP18. Extracts were subsequently cleaned by solid phase extraction with activated carbon-NH2 cartridges to eliminate interferences. Analytical determination was made by gas chromatography coupled to mass spectrometry with splitless injection. Recovery percentages were all above 70%. Instrumental precision and linearity were evaluated below the maximum residual limits of each pesticide. Finally, uncertainty and inaccuracy were below 15% for all our measurements.
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References
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