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Fluorine-Functionalized Covalent-Organic-Framework-Coated Stir Bar for the Extraction of Benzoylurea Insecticides in Pear Juice and Beverage Followed by High-Performance Liquid Chromatography–Ultraviolet Detection
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2022-09-23 , DOI: 10.1021/acs.jafc.2c03983 Lijuan Zang 1 , Yutao Ren 1 , Man He 1 , Beibei Chen 1 , Bin Hu 1
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2022-09-23 , DOI: 10.1021/acs.jafc.2c03983 Lijuan Zang 1 , Yutao Ren 1 , Man He 1 , Beibei Chen 1 , Bin Hu 1
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A fluorinated covalent organic framework (COF), named F-COF, was fabricated via simple room-temperature synthesis. With the characteristics of rich fluorine atoms, hydrophobicity, and large conjugated structure, F-COF was evaluated for the extraction of five benzoylurea insecticides (BUs) containing fluorine atoms, benzene ring, and urea bridge. Specifically, F-COF-coated stir bars were prepared by physical adhesion and exhibited higher extraction recovery (73–93 versus 40–85%) toward BUs than commercial stir bars in a shorter extraction time (50 min versus 24 h). The adsorption behavior of BUs on F-COF was explored, and it was assumed that the halogen bond (O–F), hydrophobic interaction, electrostatic interaction, and π–π stacking contributed to the adsorption. On the basis of it, a method combining stir bar sorptive extraction with liquid chromatography–ultraviolet detector was developed for trace analysis of five BUs. Under the optimal conditions, the limits of detection for BUs were found to be 0.301–0.672 μg/L, with the linear range of 1.0/2.0–500 μg/L and relative standard deviations of <8.0% (c = 5 μg/L and n = 7). The accuracy of the proposed method was validated by the recovery test, and the recoveries of target BUs in spiked pear juice and pear beverage were 82.0–113 and 84.0–112%, respectively.
中文翻译：
氟功能化共价有机骨架涂层搅拌棒用于提取梨汁和饮料中的苯甲酰脲类杀虫剂并采用高效液相色谱-紫外检测
通过简单的室温合成制备了一种名为 F-COF 的氟化共价有机框架 (COF)。F-COF具有氟原子丰富、疏水性强、共轭结构大等特点，评价了F-COF对五种含氟原子、苯环和脲桥的苯甲酰脲类杀虫剂（BUs）的萃取效果。具体而言，F-COF 涂层搅拌棒是通过物理粘附制备的，并且在更短的提取时间（50 分钟对 24 小时）内，与商业搅拌棒相比，对 BUs 的提取回收率更高（73-93 对 40-85%）。探索了 BUs 在 F-COF 上的吸附行为，假设卤素键 (O-F)、疏水相互作用、静电相互作用和 π-π 堆积对吸附有贡献。在此基础上，开发了搅拌棒吸附萃取与液相色谱-紫外检测器相结合的方法，用于五种 BU 的痕量分析。在最佳条件下，BUs的检出限为0.301~0.672 μg/L，线性范围为1.0/2.0~500 μg/L，相对标准偏差<8.0%（c = 5 μg/L，n = 7)。回收率测试验证了该方法的准确性，加标梨汁和梨饮料中目标 BUs 的回收率分别为 82.0-113 和 84.0-112%。
更新日期：2022-09-23
中文翻译：
氟功能化共价有机骨架涂层搅拌棒用于提取梨汁和饮料中的苯甲酰脲类杀虫剂并采用高效液相色谱-紫外检测
通过简单的室温合成制备了一种名为 F-COF 的氟化共价有机框架 (COF)。F-COF具有氟原子丰富、疏水性强、共轭结构大等特点，评价了F-COF对五种含氟原子、苯环和脲桥的苯甲酰脲类杀虫剂（BUs）的萃取效果。具体而言，F-COF 涂层搅拌棒是通过物理粘附制备的，并且在更短的提取时间（50 分钟对 24 小时）内，与商业搅拌棒相比，对 BUs 的提取回收率更高（73-93 对 40-85%）。探索了 BUs 在 F-COF 上的吸附行为，假设卤素键 (O-F)、疏水相互作用、静电相互作用和 π-π 堆积对吸附有贡献。在此基础上，开发了搅拌棒吸附萃取与液相色谱-紫外检测器相结合的方法，用于五种 BU 的痕量分析。在最佳条件下，BUs的检出限为0.301~0.672 μg/L，线性范围为1.0/2.0~500 μg/L，相对标准偏差<8.0%（c = 5 μg/L，n = 7)。回收率测试验证了该方法的准确性，加标梨汁和梨饮料中目标 BUs 的回收率分别为 82.0-113 和 84.0-112%。
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