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Analysing organochlorine pesticides in strawberry jams using GC-ECD, GC-MS/MS and QuEChERS sample preparation
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Orientador(es)
Resumo(s)
This paper describes a comparison of adaptations of the QuEChERS (quick, easy, cheap, effective, rugged and
safe) approach for the determination of 14 organochlorine pesticide (OCP) residues in strawberry jam by
concurrent use of gas chromatography (GC) coupled to electron capture detector (ECD) and GC tandem mass
spectrometry (GC-MS/MS). Three versions were tested based on the original QuEChERS method. The results
were good (overall average of 89% recoveries with 15% RSD) using the ultrasonic bath at five spiked levels.
Performance characteristics, such as accuracy, precision, linear range, limits of detection (LOD) and
quantification (LOQ), were determined for each pesticide. LOD ranged from 0.8 to 8.9 microg kg-1 ; LOQ was in
the range of 2.5–29.8 microg kg- 1; and calibration curves were linear (r2>0.9970) in the whole range of the explored
concentrations (5–100 microg kg- 1). The LODs of these pesticides were much lower than the maximum residue levels
(MRLs) allowed in Europe for strawberries. The method was successfully applied to the quantification of OCP in
commercially available jams. The OCPs were detected lower than the LOD.
Descrição
Palavras-chave
Chromatography – GC Extraction GC/MS Pesticides – organochlorine Pesticide residues Processed foods Organic foods Cooked foods Fruit
Contexto Educativo
Citação
Editora
Taylor & Francis