4 research outputs found
Analysis of six fungicides and one acaricide in still and fortified wines using solid-phase microextraction-gas chromatography/tandem mass spectrometry
A multiresidue gas chromatographic method for the determination of six fungicides (captan, chlorthalonil,
folpet, iprodione, procymidone and vinclozolin) and one acaricide (dicofol) in still and fortified wines was
developed. Solid-phase microextraction (SPME) was chosen for the extraction of the compounds from the
studied matrices and tandem mass spectrometry (MS/MS) detection was used. The extraction consists in a
solvent free and automated procedure and the detection is highly sensitive and selective. Good linearity
was obtained with correlation coefficients of regression (R2) > 0.99 for all the compounds. Satisfactory
results of repeatability and intermediate precision were obtained for most of the analytes (RSD < 20%).
Recoveries from spiked wine ranged from 80.1% to 112.0%. Limits of quantification (LOQs) were considerably
below the proposedmaximumresidue limits (MRLs) for these compounds in grapes and below the suggested
limits for wine (MRLs/10), with the exception of captan
Multiresidue method for the determination of organophosphorus pesticides in still wine and fortified wine using solid-phase microextraction and gas chromatography – Tandem mass spectrometry
A SPME-GC-MS/MS method for the determination of eight organophosphorus pesticides
(azinphos-methyl, chlorpyriphos, chlorpyriphos-methyl, diazinon, fenitrothion, fenthion,
malathion, and methidathion) in still and fortified wine was developed. The extraction procedure
is simple, solvent free, and without any sample pretreatment. Limits of detection
(LOD) and quantitation (LOQ) values in the range 0.1–14.3 lg/L and 0.2–43.3 lg/L,
respectively, were obtained. The LOQ values are below the maximum residue levels
(MRLs) established by European Regulation for grapes, with the exception of methidathion.
Coefficients of correlation (R2) higher than 0.99 were obtained for the majority
of the pesticides, in all different wines analyzed