AbstractThe authors describe a zinc(II) benzenetricarboxylate (Zn-BTC) based metal-organic framework (MOF) with chrysanthemum-like structure, and its application to the adsorption of pesticides from real water samples. The Zn-BTC MOF was characterized by XRD, TGA, SEM, nitrogen adsorption-desorption analysis and FT-IR spectroscopy. The MOF was used in dispersive solid-phase extraction of six aromatic pesticides from various wastewater samples prior to their quantification by HPLC. Extraction times, extraction temperature, amount of adsorbent, and oscillation rate were optimized. Under the optimal conditions, the method has relative standard deviations (RSDs) of 6.1–10.1%, and good linearity (correlation coefficients higher than 0.9974). The LODs and LOQs for seven pesticides are found to be 0.20–1.60 μg·L−1 and 0.66–5.28 μg·L−1, respectively. The RSDs of within batch extraction are 1.6–9.5% and 3.9–12%. Graphical abstractSchematic of a zinc-benzenetricarboxylate (Zn-BTC) based metal-organic framework (MOF) for use as an adsorbent of dispersive solid phase extraction (DSPE) of pesticides prior to their determination by HPLC.

中文翻译：

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具有特殊吸附性能的苯三羧酸锌(II)金属有机骨架及其在农药预浓缩中的应用

摘要 作者描述了一种具有菊花状结构的苯三羧酸锌 (Zn-BTC) 基金属有机骨架 (MOF) 及其在实际水样中农药吸附的应用。通过XRD、TGA、SEM、氮吸附-解吸分析和FT-IR光谱对Zn-BTC MOF进行表征。MOF 用于从各种废水样品中对六种芳香族农药进行分散固相萃取，然后再通过 HPLC 对其进行定量。对萃取次数、萃取温度、吸附剂用量和振荡速率进行了优化。在最佳条件下，该方法的相对标准偏差 (RSD) 为 6.1-10.1%，线性良好（相关系数高于 0.9974）。发现七种农药的 LOD 和 LOQ 分别为 0.20-1.60 μg·L-1 和 0.66-5.28 μg·L-1。批内提取的 RSD 为 1.6-9.5% 和 3.9-12%。图形摘要基于苯三羧酸锌 (Zn-BTC) 的金属有机骨架 (MOF) 的示意图，用作农药分散固相萃取 (DSPE) 的吸附剂，然后通过 HPLC 进行测定。