MIL-125@ZIF-8 based solid phase microextraction coating for sensitive determination of organophosphate esters in aqueous environments

IF 5.3 2区化学 Q1 CHEMISTRY, ANALYTICAL Microchimica Acta Pub Date : 2025-03-28 DOI:10.1007/s00604-025-07127-8

Xingru Hu, Jiahui Hou, Long Pang, Zhigao Feng, Junhao Liu, Haiyang Feng, Ying Kong, Chao Liu

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Abstract

A novel MOF-on-MOF heterostructure (MIL-125@ZIF-8) was synthesized and utilized as a coating material for solid-phase microextraction (SPME), which was subsequently coupled with gas chromatography (GC) for the sensitive determination of organophosphate esters (OPEs) in water samples. Compared to commercial fiber, the MIL-125@ZIF-8 coated fiber (MIL-125@ZIF-8-F) demonstrated superior extraction performance for medium-polar or non-polar compounds due to multiple interactions such as hydrophobic interaction, π-π stacking, and hydrogen bonding. The synergistic effect of MIL-125 and ZIF-8 endowed the MIL-125@ZIF-8-F with high efficiency and excellent stability under extreme conditions. Specifically, the developed MIL-125@ZIF-8-F could withstand 80 conditioning cycles without significant loss of extraction capacity. Moreover, the established method exhibited a wide linear range (10–1000 μg L⁻¹), low detection limits (0.03–0.20 μg L⁻¹), and excellent reproducibility under optimized condition. Finally, this proposed method provided a promising approach for the efficient enrichment of trace OPEs in actual environmental water samples.

Graphical Abstract

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基于MIL-125@ZIF-8的固相微萃取涂层，用于水环境中有机磷酸酯的灵敏测定

合成了一种新型MOF-on-MOF异质结构（MIL-125@ZIF-8），并将其用作固相微萃取（SPME）的涂层材料，随后将其与气相色谱（GC）相结合，用于水样中有机磷酸酯（OPEs）的灵敏测定。与商业纤维相比，MIL-125@ZIF-8涂层纤维（MIL-125@ZIF-8-F）由于疏水相互作用、π-π堆叠和氢键等多种相互作用，对中极性或非极性化合物的提取性能优越。MIL-125和ZIF-8的协同作用使MIL-125@ZIF-8-F在极端条件下具有高效率和优异的稳定性。具体而言，开发的MIL-125@ZIF-8-F可以承受80次调理循环而不会显著损失提取能力。该方法线性范围宽（10 ~ 1000 μg L−1），检出限低（0.03 ~ 0.20 μg L−1），在优化条件下重现性好。最后，该方法为实际环境水样中痕量OPEs的高效富集提供了一种有前景的方法。图形抽象

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来源期刊

Microchimica Acta 化学-分析化学

CiteScore

9.80

自引率

5.30%

发文量

410

审稿时长

2.7 months

期刊介绍： As a peer-reviewed journal for analytical sciences and technologies on the micro- and nanoscale, Microchimica Acta has established itself as a premier forum for truly novel approaches in chemical and biochemical analysis. Coverage includes methods and devices that provide expedient solutions to the most contemporary demands in this area. Examples are point-of-care technologies, wearable (bio)sensors, in-vivo-monitoring, micro/nanomotors and materials based on synthetic biology as well as biomedical imaging and targeting.