Multifamily determination of pesticide residues in soya-based nutraceutical products by GC/MS-MS

卷:173

Palenikova, Agnesa ; Martinez-Dominguez, Gerardo ; Arrebola, Francisco Javier ; Romero-Gonzalez, Roberto ; Hrouzkova, Svetlana ; Frenich, Antonia Garrido

关键词: Pesticide residues;    Soya nutraceuticals;    QuEChERS;    GC-QqQ-MS/MS;   

DOI  :  10.1016/j.foodchem.2014.10.100

学科分类：食品科学和技术

【 摘 要 】

An analytical method based on a modified QuEChERS extraction coupled with gas chromatography tandem mass spectrometry (GC-MS/MS) was evaluated for the determination of 177 pesticides in soya-based nutraceutical products. The QuEChERS method was optimised and different extraction solvents and clean-up approaches were tested, obtaining the most efficient conditions with a mixture of sorbents (PSA, C18, GBC and Zr-Sep(+)). Recoveries were evaluated at 10, 50 and 100 mu g/kg and ranged between 70% and 120%. Precision was expressed as relative standard deviation (RSD), and it was evaluated for more than 160 pesticides as intra and inter-day precision, with values always below 20% and 25%, respectively. Limits of detection (LODs) ranged from 0.1 to 10 mu g/kg, whereas limits of quantification (LOQs) from 0.5 to 20 mu g/kg. The applicability of the method was proved by analysing soya-based nutraceuticals. Two pesticides were found in these samples, malathion and pyriproxyfen, at 11.1 and 1.5 mu g/kg respectively. (C) 2014 Elsevier Ltd. All rights reserved.