基于双重增强CNTs-PAN@UiO-66-NH2纳米纤维膜的耐用移液管尖端固相萃取快速提取多氯联苯

IF 8.1 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2025-06-18 DOI:10.1016/j.seppur.2025.134046

Xuemei Wang , Fu Mu , Jiyun Chen , Jingwei Liu , Rao Peng , Xinzhen Du , Xiaoquan Lu

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引用次数: 0

摘要

监测多氯联苯的浓度和评估多氯联苯的暴露风险多年来一直是一个重要的人口健康问题。然而，由于高亲脂性和极低浓度的多氯联苯，这项任务仍然具有挑战性。在本研究中，基于羧基化碳纳米管（COOH-CNTs）和聚丙烯腈（PAN）@ uuo -66- nh2双增强纳米纤维膜（CNTs-PAN@UiO-66-NH2），提出了一种耐用的移液管尖端固相萃取（PT-SPE）方法，用于在高效液相色谱-紫外（HPLC-UV）之前快速提取和精确检测pcb。由于COOH-CNTs和UiO-66-NH2的掺入，所构建的纳米纤维膜具有优异的机械强度和丰富的吸附位点。系统优化了关键的PT-SPE参数，成功地在17分钟内从实际水和食品样品中提取了5种多氯联苯。优化条件下，5种多氯联苯的检出限（lod, S/N = 3）和定量限（loq, S/N = 10）分别为0.008 ~ 0.241 μg·L−1和0.027 ~ 0.803 μg·L−1。此外，吸附能的密度泛函理论（DFT）计算证实了卤素键的引入对实现CNTs-PAN@UiO-66-NH2 NFM对pcb的高萃取能力起着关键作用。该方法分析速度快，灵敏度高，适用于多氯联苯的超痕量测定。

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A durable pipette tip-solid-phase extraction based on dually enhanced CNTs-PAN@UiO-66-NH2 nanofiber membrane for rapid extraction of polychlorinated biphenyls

Monitoring concentration and evaluate of the exposure risk of polychlorinated biphenyls (PCBs) has been a significant Population health concern for many years. However, this task remains challenging due to the high lipophilicity and extremely low concentrations of PCBs. In this study, a durable pipette tip-solid phase extraction (PT-SPE) was proposed based on carboxylated carbon nanotubes (COOH-CNTs)-and poly acrylonitrile (PAN)@UiO-66-NH₂ dually enhanced nanofiber membrane (CNTs-PAN@UiO-66-NH₂) for reaching rapid extraction and precise detection of PCBs prior to high-performance liquid chromatography-ultraviolet (HPLC-UV). The constructed nanofiber membrane (NFM) had outstanding mechanical strength and plentiful adsorption sites due to the incorporation of COOH-CNTs and UiO-66-NH₂. A systematic optimization of critical PT-SPE parameters resulted in the successful extraction of five PCBs within 17 min in real water and food samples. Under optimized conditions, the limits of detection (LODs, S/N = 3) and quantification (LOQs, S/N = 10) were determined to be in the ranges of 0.008–0.241 μg⋅L⁻¹ and 0.027–0.803 μg⋅L⁻¹ for the five PCBs, respectively. Additionally, density functional theory (DFT) calculations of adsorption energy confirmed that the introduction of halogen bonding played a pivotal role in realizing the high extraction capacity of CNTs-PAN@UiO-66-NH₂ NFM for PCBs. The developed method offered the superiorities of rapid analysis and high sensitivity, making it be well-suited for the ultra-trace determination of PCBs.

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.