探索者
化学
色谱法
气相色谱/串联质谱法
检出限
农药残留
三级四极质谱仪
气相色谱法
质谱法
气相色谱-质谱法
基质(化学分析)
萃取(化学)
杀虫剂
串联质谱法
选择性反应监测
生物
农学
作者
Ana Lozano,Łukasz Rajski,Samanta Uclés,Noelia Belmonte-Valles,Milagros Mezcua,Amadeo R. Fernández-Alba
出处
期刊:Talanta
[Elsevier]
日期:2014-01-01
卷期号:118: 68-83
被引量:82
标识
DOI:10.1016/j.talanta.2013.09.053
摘要
Two sorbents containing ZrO2 (Z-Sep and Z-Sep+) were tested as a d-SPE clean-up in combination with the QuEChERS and ethyl acetate multiresidue method in the pesticide residues extraction in avocado. All extracts were analysed using gas chromatography coupled with a triple quadrupole mass spectrometer working in multi-reaction monitoring mode. GC QToF was used to compare the amount of matrix compounds present in the final extracts, prepared according to different protocols. The highest number of pesticides with acceptable recoveries and the lowest amount of coextracted matrix compounds were provided by QuEChERS with Z-Sep. Subsequently, this method was fully validated in avocado and almonds. Validation studies were carried out according to DG Sanco guidelines including: the evaluation of recoveries at two levels (10 and 50 μg/kg), limit of quantitation, linearity, matrix effects, as well as interday and intraday precision. In avocado, 166 pesticides were fully validated compared to 119 in almonds. The method was operated satisfactorily in routine analysis and was applied to real samples.
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