尿素连接的共价有机框架功能化聚四氟乙烯膜用于选择性和快速的薄膜微萃取罗丹明 B。
Urea-linked covalent organic framework functionalized polytetrafluoroethylene film for selective and rapid thin film microextraction of rhodamine B.
机构信息
State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China; Institute of Analytical Food Safety, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China; Institute of Analytical Food Safety, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
出版信息
J Chromatogr A. 2022 Jun 21;1673:463133. doi: 10.1016/j.chroma.2022.463133. Epub 2022 May 8.
Incorporation of highly selective and stable adsorbent with facile extraction technology is desired in practical analysis. Here we show the rational preparation of a urea-linked covalent organic framework functionalized polytetrafluoroethylene film (COF-117-PTFE) with ordered porous structure, rich functional groups, and large surface area-to-volume ratio as the effective adsorbent for convenient, selective and rapid thin film microextraction (TFME) of rhodamine B (RB). The COF-117-PTFE based TFME coupled with high performance liquid chromatography-fluorescence detector (HPLC-FLD) successfully realized the determination of RB with the limit of detection of 0.007 μg L, the linear range of 0.1 - 100 μg L. The relative standard deviation (RSD) of intraday (n = 5) and interday (n = 5) for the determination of 10 μg L RB were 2.3% and 6.8%, respectively. The absolute recoveries were 80.3%, 71.2% and 67.9% in river water, chili powder and Sichuan pepper powder, respectively. The recoveries for RB spiking in complicated real samples (dry chili, chili powder, dry Sichuan pepper, Sichuan pepper powder and river water) ranged from 90.4% to 107.5%. The developed COF-117-PTFE based TFME-HPLC-FLD method is promising in practical application. This work reveals the high potential of functionalized COF film as the adsorbent for effective extraction of trace contaminants in complicated samples.
在实际分析中，需要将高选择性和稳定的吸附剂与易于提取的技术结合使用。在这里，我们展示了合理制备具有有序多孔结构、丰富官能团和大表面积与体积比的尿素连接的共价有机骨架功能化聚四氟乙烯膜（COF-117-PTFE）作为有效的吸附剂，用于方便、选择性和快速薄膜微萃取（TFME）罗丹明 B（RB）。基于 COF-117-PTFE 的 TFME 与高效液相色谱-荧光检测器（HPLC-FLD）相结合，成功实现了 RB 的测定，检测限为 0.007 μg L，线性范围为 0.1-100 μg L。在 10 μg L RB 的测定中，日内（n=5）和日间（n=5）的相对标准偏差（RSD）分别为 2.3%和 6.8%。在河水、辣椒粉和四川花椒粉中，RB 的绝对回收率分别为 80.3%、71.2%和 67.9%。在复杂实际样品（干辣椒、辣椒粉、干四川花椒、四川花椒粉和河水）中添加 RB 的回收率在 90.4%至 107.5%之间。开发的 COF-117-PTFE 基 TFME-HPLC-FLD 方法在实际应用中具有广阔的前景。这项工作揭示了功能化 COF 膜作为吸附剂用于有效提取复杂样品中痕量污染物的巨大潜力。
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