Determination of carbofuran and 3-hydroxycarbofuran residues in coconut water by solid-phase extraction and liquid chromatography with UV detection

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Ogawa, S.
Brito, N. M.
Silva, MRS
Ribeiro, M. L.
Leite, L. A.
Dorea, H. S.
Navickiene, S.
Abakerli, R. B.
Ferreira, JMS

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Taylor & Francis Inc


A simple method was developed to determine carbofuran and 3-hydroxycarbofuran in coconut water. The procedure involved solid-phase extraction using C-18 cartridges with acetonitrile for elution. The analysis of these compounds was carried out by liquid chromatography with UV detection at 275 nm using a gradient solvent system. The method was validated with fortified samples at different concentration levels (0.01-2.5 mu g/mL). Average recoveries ranged from 81 to 95% with relative standard deviation between 1.6 and 12.5%. Each recovery analysis was repeated at least five times. Detection limits ranged from 0.008 to 0.01 mu g/mL. The analytical procedure was applied to coconut water samples from palms submitted to treatment with commercial formulation under field conditions.



coconut water, carbofuran, 3-hydroxycarbofuran, pesticides

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Journal of Liquid Chromatography & Related Technologies. Philadelphia: Taylor & Francis Inc., v. 29, n. 12, p. 1833-1841, 2006.