探索者
农药残留
残留物(化学)
化学
色谱法
杀虫剂
液相色谱-质谱法
串联质谱法
检出限
最大残留限量
质谱法
农学
生物
生物化学
作者
Youzhi Su,Jing Lu,Jun Li,Fang Li,Ning Wang,Hongqin Lei,Xiaofang Shen
出处
期刊:Food Chemistry
[Elsevier]
日期:2024-02-01
卷期号:434: 137467-137467
被引量:1
标识
DOI:10.1016/j.foodchem.2023.137467
摘要
A modified QuEChERS purification-liquid chromatography-tandem mass spectrometry method has been developed to determine 51 pesticide residues with newly established maximum residue limits (MRLs) in foodstuffs. Samples were extracted with acetonitrile under citrate-buffered conditions and purified using a modified QuEChERS method employing hydroxylated MWCNTs, SAX, and C18. The limits of quantification ranged from 0.2 to 9.8 µg/kg. Recoveries in ten different foodstuffs ranged from 70.2% to 117.9%, with relative standard deviations between 2.3% and 19.9% at three spiking levels. This method was applied to analyze 352 market samples, detecting 14 pesticides in 97 samples. Notably, Afidopyropen, cyantraniliprole, and fluxapyroxad residues in vegetables exhibited a consistent pattern of higher levels in the spring and winter and lower levels in the summer and autumn. Moreover, the risk assessments for acute and chronic dietary exposure to the 14 detected pesticides indicated that the %ADI and %ARfD were well below 100%.
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