Details

Autor(en) / Beteiligte

• Deme, Pragney
• Azmeera, Tirupathi
• Prabhavathi Devi, B.L.A.
• Jonnalagadda, Padmaja R.
• Prasad, R.B.N.
• Vijaya Sarathi, U.V.R.

Titel

An improved dispersive solid-phase extraction clean-up method for the gas chromatography–negative chemical ionisation tandem mass spectrometric determination of multiclass pesticide residues in edible oils

Ist Teil von

• Food chemistry, 2014-01, Vol.142, p.144-151

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2014

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• •An improved method for the analysis of pesticide residues in oil was developed.•Extraction was carried out by an improved DSPE method.•Quantification was carried out by GC–NCI-MS/MS for all residues.•Detection limits lower than the required MRLs were achieved.•Method can be adopted for multi residue analysis from edible oil samples. An improved sample preparation using dispersive solid-phase extraction clean-up was proposed for the trace level determination of 35 multiclass pesticide residues (organochlorine, organophosphorus and synthetic pyrethroids) in edible oils. Quantification of the analytes was carried out by gas chromatography–mass spectrometry in negative chemical ionisation mode (GC–NCI-MS/MS). The limit of detection and limit of quantification of residues were in the range of 0.01–1ng/g and 0.05–2ng/g, respectively. The analytes showed recoveries between 62% and 110%, and the matrix effect was observed to be less than 25% for most of the pesticides. Crude edible oil samples showed endosulfan isomers, p,p′-DDD, α-cypermethrin, chlorpyrifos, and diazinon residues in the range of 0.56–2.14ng/g. However, no pesticide residues in the detection range of the method were observed in refined oils.