PEG-modified magnetic Schiff base network-1 materials for the magnetic solid phase extraction of benzoylurea pesticides from environmental water samples
PEG-modified magnetic Schiff base network-1 materials for the magnetic solid phase extraction of benzoylurea pesticides from environmental water samples
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PEG修饰的磁性席夫碱网络-1材料用于从环境水样中磁性固相萃取苯甲酰脲类农药
DOI：
10.1016/j.chroma.2020.460950
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发表时间：
2020-05-24
影响因子：
4.1
通讯作者：
Lu, Runhua
中科院分区：
文献类型：
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作者：
Fan, Jiaxuan;Liu, Zikai;Lu, Runhua
由于苯甲酰脲类农药在环境循环中的毒性，建立一种快速、简便、环境友好的检测方法十分必要。本文基于Schiffbase反应制备了一种新型聚乙二醇（PEG）修饰的磁性共价有机骨架材料（PEG/Fe3O4@SNW-1）。这种材料被用作吸附剂富集五个BU的磁性固相萃取之前，通过高效液相色谱检测。通过对盐度、萃取时间、吸附剂用量、解吸时间等参数的优化，影响磁性固相萃取过程的回收率，检测限（S/N = 3）被定义为小于1.0 μ g L-1，定量限（S/N = 10）被计算为小于3.4 μ g L-1。线性范围为5 ~ 1000 μ g·L ~（-1）。最后，将该方法应用于3种环境水样中苯甲酰脲类农药的分析。这些结果表明，所提出的方法是可行的，并证明了PEG/Fe3O4@SNW-1材料在检测环境水样中类似农药残留方面的潜在应用。(C)2020 Elsevier B. V.保留所有权利。
It is necessary to establish a rapid, simple and environmentally friendly detection method for benzoylurea pesticides (BUs) in environmental water samples because of their toxicity in environmental circulation. Herein, a novel polyethylene glycol (PEG) modified magnetic covalent organic framework material based on the Schiffbase reaction was prepared (PEG/Fe3O4@SNW-1). This material was used as a sorbent for enriching five BUs by magnetic solid phase extraction prior to detection via high-performance liquid chromatography. After the optimization of several parameters (such as the salinity, extraction time, amount of sorbent, desorption time, etc.) that influenced the recovery of the magnetic solid phase extraction process, the limits of detection (S/N = 3) were defined as less than 1.0 mu g L-1, and the limits of quantitation (S/N = 10) were calculated as being lower than 3.4 mu g L-1. A satisfactory linear range of 5-100 0 mu g L-1 was achieved. Finally, the proposed method was applied to analyze benzoylurea pesticides in three environmental water samples. These results indicated that the proposed method was feasible and demonstrated the potential application of the PEG/Fe3O4@SNW-1 material for detecting similar pesticide residues in environmental water samples. (C) 2020 Elsevier B.V. All rights reserved.