为高效提取极性芳香胺而构建高度水友性碳胺结合的共价有机框架:实验和理论计算
Qidong Yu1, Xueting Cui1, Wenmin Zhang2
1Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Province Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350116, China.
碳胺功能化增强了共价有机框架 (COFs),以改善食品和饮料中极性芳胺 (AAs) 的提取. 这种方法可以对水友污染物进行敏感的微量检测.
科学领域:
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
- 环境科学 环境科学
背景情况:
- 共价有机框架 (COF) 为样品预处理提供了高表面积和稳定性.
- 然而,它们的低极性限制了极性,水友性污染物的丰富.
- 极性芳胺 (AAs) 是食品中的重要水友污染物,需要敏感检测.
研究的目的:
- 为COF开发一种碳胺功能化策略,以增强极性芳胺 (AAs) 的提取.
- 建立一种敏感的方法,使用修改后的COF检测食品和饮料中的AA的微量检测.
主要方法:
- 碳胺功能化COF引入O-CO活性位点,增强水友性和相互作用能力.
- 开发一种固相微提取 (SPME) 方法与气相色谱-并联质谱法 (GC-MS/MS) 相结合.
主要成果:
- 碳胺功能化引入了O-CO位点,促进了与AA的结合和静电相互作用.
- 修改后的COF纤维显示了增强的水友性,π-π相互作用和SPME的稳定性.
- 通过SPME-GC-MS/MS方法在茶饮料中实现了广泛的线性 (2.0-800.0 ng L-1),低的检测极限 (0.5-1.0 ng L-1),以及良好的回收率 (83.6-116.8%).
结论:
- 碳胺功能化为调节COF极性和有效丰富水友污染物提供了一种新的方法.
- 该战略为食品和饮料中极性AA的微量分析提供了坚实的技术基础.
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