Polydopamine-based immobilization of a hydrazone covalent organic framework for headspace solid-phase microextraction of pyrethroids in vegetables and fruits.
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 0.23μgkg(-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.
College of Chemistry, Jilin University, Changchun 130012, China.
Mingxue
M
Wu
College of Chemistry, Jilin University, Changchun 130012, China.
Gang
G
Chen
Changchun GeneScience Pharmaceuticals Co., Ltd., Changchun 130012, China.
Ping
P
Liu
College of Chemistry, Jilin University, Changchun 130012, China.
Weihong
W
Zhou
College of Chemistry, Jilin University, Changchun 130012, China. Electronic address: jiaqiong@jlu.edu.cn.
Qiong
Q
Jia
D002849:Chromatography, Gas; D004785:Environmental Pollutants / Q000302:isolation & purification*; D005638:Fruit / Q000737:chemistry*; D006835:Hydrazones / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D057230:Limit of Detection; D011108:Polymers / Q000737:chemistry*; D011722:Pyrethrins / Q000302:isolation & purification*; D052617:Solid Phase Microextraction / Q000295:instrumentation / Q000379:methods*; D013193:Stainless Steel / Q000737:chemistry; D014675:Vegetables / Q000737:chemistry*
D004785:Environmental Pollutants; D006835:Hydrazones; D007211:Indoles; D011108:Polymers; D011722:Pyrethrins; C568283:polydopamine; D013193:Stainless Steel
Hydrazone covalent organic framework; Polydopamine; Pyrethroids; Solid-phase microextraction