Validation of a method for the determination of multiclass pesticide residues in fruit juices by liquid chromatography/tandem mass spectrometry after extraction by matrix solid-phase dispersion.
A multiresidue method was developed and validated for the determination of pesticide residues (omethoate, dimethoate, carbendazim, propoxur, thiabendazole, carbaryl, pirimicarb, azinphos-methyl, methidathion, and iprodione) in fruit juices. The samples were extracted by matrix solid-phase dispersion with diatomaceous earth and analyzed by liquid chromatography/tandem mass spectrometry. The method detection limits were <0.2 ppb for all pesticides; the relative standard deviations for analyses of samples fortified over the range of 2-50 ng/g were <9%, and the recoveries for each pesticide were all between 77 and 102%. The proposed method was used to analyze 21 commercial fruit juices; pesticide residues were found in 71% of the samples.
Perret
Daniela
D
Università La Sapienza di Roma, Dipartimento di Chimica, Rome, Italy. daniela.perret@uniroma1.it
Gentili
Alessandra
A
Marchese
Stefano
S
Sergi
Manuel
M
D'Asceno
Giuseppe
G
D001628:Beverages / Q000032:analysis*; D002853:Chromatography, Liquid; D005638:Fruit; D008401:Gas Chromatography-Mass Spectrometry; D010573:Pesticide Residues / Q000032:analysis*
D010573:Pesticide Residues