Abstract：
In this paper, the novel 3D N-doped magnetic porous carbon spheres (3D N-MPCSs) was constructed via a simple template-free and self-doping method, followed by a direct carbonization of polymer with Fe3+ for simultaneous activation and magnetization. For the first time, the designed 3D N-MPCSs was used as multifunctional (for extraction and magnetic separation) adsorbents for microwave-assisted derivatization and magnetic solid phase extraction, which exhibited excellent extraction ability for its large surface area, mesoporous structure, spherical morphology, and incorporation of N/O heteroatoms. Moreover, when the microwave-assisted derivatization was combined with the magnetic solid phase extraction, the extraction, derivatization and concentration was completed simultaneously within 135 s. Furthermore, this method has a low detection limit (0.059-0.073 ng mL-1) and high enhancement factors (333 < EFs < 382) for trace biogenic amine (BAs). The recoveries were between 92.3 and 108.8% with relative standard deviations less than 5.9%. Overall, a simple, rapid, efficient and sensitive method for the analysis of BAs in food samples was developed, which provided the basis for routine detection of food safety.
摘要：
在本文中,通过简单的无模板和自掺杂方法构建了新型3DN掺杂磁性多孔碳球（3DN-MPCSs），然后用Fe3直接碳化聚合物，以同时活化和磁化。第一次,设计的3DN-MPCSs用作微波辅助衍生和磁性固相萃取的多功能（用于萃取和磁分离）吸附剂，它对其大表面积表现出优异的提取能力，介孔结构，球形形态，和N/O杂原子的掺入。此外，当微波辅助衍生与磁性固相萃取相结合时，提取，衍生化和浓缩在135s内同时完成。此外，该方法对痕量生物胺（BA）具有低检测限（0.059-0.073ngmL-1）和高增强因子（333
