化学
色谱法
质谱法
萃取(化学)
基质(化学分析)
杀虫剂
气相色谱-质谱法
农药残留
气相色谱法
检出限
三级四极质谱仪
溶剂
乙腈
选择性反应监测
串联质谱法
有机化学
生物
农学
作者
Alessia Arena,Antonio Ferracane,Mariosimone Zoccali,Markus Obkircher,Hanspeter Sprecher,Peter Q. Tranchida,Luigi Mondello
标识
DOI:10.1016/j.chroma.2023.464432
摘要
The method herein described involves a rapid and limited-volume (0.5 mL of acetonitrile) solvent-extraction sample preparation process, for pesticide determination in hemp seed oil. The extraction method was characterized by the absence of both clean-up or pre-concentration steps. The extracts were directly analyzed through cryogenic-modulation comprehensive two-dimensional gas chromatography coupled to triple quadrupole mass spectrometry. The novelty characterizing the present research [compared to a previous one (Arena et al., 2023)] is related to the extension of the number of pesticides (97), and to the investigation of a more challenging matrix, contained in a vegetable oil of increasing interest among consumers. Linearity, limits of detection and quantification, accuracy, precision, recovery, and matrix effect were measured. Particular emphasis was devoted to the matrix effect, with the co-extracted matrix amount defined. Three international regulations (Canada, California, Europe) were considered, and the obtained limits of quantification were found to be too high in five (Canada) and twelve (Europe) cases, for a total number of 15 pesticides. The analysis of ten commercial samples showed the presence of seven pesticide residues in four of them, at concentration levels ranging from 0.02 to 0.98 mg kg-1, with most over the regulation residue limits.
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