期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1456, 期 -, 页码 34-41出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2016.05.100
关键词
Polydopamine; Hydrazone covalent organic framework; Solid-phase microextraction; Pyrethroids
资金
- National Natural Science Foundation of China [21575049]
- Jilin Provincial Science & Technology Department [20140101112JC]
We designed a novel hydrazone covalent organic framework (COF) and developed a polydopamine (PDA) method to immobilize COF on a stainless steel fiber for headspace solid-phase microextraction (HS-SPME). A series of characterization studies was performed to validate the structure and property of the prepared fiber. The COF-PDA fiber was applied for the extraction of pyrethroids coupled with gas chromatography equipped with an electron capture detector (GC-ECD). Under the optimum experimental conditions, high enhancement factors of 307-2327 were achieved, indicating that the hydrazone COF possessed good extraction efficiency for pyrethroids. The detection limits ranged from 0.11 to 0.23 mu g kg(-1) with relative standard deviations varying in the range of 3.6-9.2% (intra-batch) and 6.9-12.1% (inter-batch), respectively. The developed method was applied to the determination of pyrethroids in fruit and vegetable samples and the accuracy was assessed through recovery experiments. (C) 2016 Elsevier B.V. All rights reserved.
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