期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 67, 期 13, 页码 3733-3743出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.8b06372
关键词
COFs; magnetic nanospheres; magnetic solid phase extraction; heterocyclic aromatic amines; urine; tar yields
资金
- National Natural Science Foundation of China [21775140, 21705143, 21475119, 21605042]
- Henan Province outstanding scientific and technological innovation talent [184200510019]
- China Scholarship Council
The facile preparation, characterization, and application of novel dual-shell TpBD (a kind of covalentorganic framework) coated magnetic nanospheres as sorbents for simple, fast, and high selectivity capture of 14 heterocyclic aromatic amines (HAAs) are reported. Quantum chemistry theory calculations were conducted to directly and quantifiably describe the multiple interactions, including pi-pi, hydrogen bonding, cation-pi, static electricity, and ion-exchange, between TpBD and heterocyclic aromatic amines. The excellent adsorption capacity of TpBD coated magnetic nanospheres was further evaluated by extraction of 14 HAAs from nonsmokers and smokers urine samples. Under the optimized conditions, the magnetic solid phase extraction process can be completed with high recovery ranging from 95.4% to 129.3%. After being washed with acetonitrile and water successively, the collected sorbents can be easily recycled and reused five times without any significant difference in performance. Coupled with the ultra performance liquid chromatography-tandem mass spectrometer detection, the exposure level of HAAs in nonsmokers and smokers smoking cigarettes with different tar yields were successfully explored. And, this implied that the robust method based on the versatile TpBD coated dual-shell magnetic nanospheres sorbents represents a great potential application in the analysis of disease markers and body fluids.
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