Solidification of a Switchable Solvent-Based QuEChERS Method for Detection of 16 Pesticides in Some Fruits and Vegetables
文献类型： 外文期刊
作者： Wang, Jun 1 ; Duan, Hui-Ling 1 ; Ma, Shi-Yao 1 ; Zhang, Jing 1 ; Zhang, Zhi-Qi 1 ;
作者机构： 1.Shaanxi Normal Univ, Key Lab Analyt Chem Life Sci Shaanxi Prov, Xian 710062, Shaanxi, Peoples R China
2.Shaanxi Normal Univ, Key Lab Med Resources & Nat Pharmaceut Chem, Minist Educ, Xian 710062, Shaanxi, Peoples R China
3.Tibet Acad Agr & Anim Husb Sci, Inst Agr Prod Qual Stand & Testing Res, Lhasa 850032, Peoples R China
关键词： QuEChERS method; n-octadecylamine; solidification of switchable solvent; dispersive liquid-liquid microextraction; GC-MS
期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）
ISSN： 0021-8561
年卷期： 2019 年 67 卷 28 期
页码：
收录情况： SCI
摘要： n-Octadecylamine was adopted as a cleanup agent to develop a novel solidification of a switchable solvent-based QuEChERS method. At higher temperatures (such as 55 degrees C), n-octadecylamine can melt into a liquid, allowing effective extraction of matrix interferences in acetonitrile solution (i.e., in dispersive liquid-liquid microextraction). At lower temperatures, n-octadecylamine carrying matrix interferences can rapidly solidify and easily separate from the acetonitrile solution. The results demonstrated that n-octadecylamine possessed a better ability to remove matrix interferences and reduce matrix effects than those of traditional solid-phase dispersive extraction cleanup agents of primary secondary amine and octadecyl bonded silica gel. By coupling it with gas chromatography-mass spectrometry, the proposed method was applied to the detection of 16 pesticides in cucumber. The recoveries were from 80.9 to 112.6% with relative standard deviations less than 12.9%. Satisfactory results were also obtained for the detection of 16 pesticides in pear, orange, apple, pepper, lettuce, and tomato.
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