Journal
ANALYST
Volume 141, Issue 1, Pages 243-250Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5an01372k
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Funding
- National Natural Science Foundation of China [21205047]
- Jilin Provincial Science & Technology Department [20140101112JC]
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A novel hybrid material incorporating porous aromatic frameworks and an ionic liquid, 1-(triethoxy silyl)propyl-3-aminopropyl imidazole hexafluorophosphate, was prepared as solid-phase microextraction coating and employed for the extraction of organochlorine pesticides. Combining the advantages of porous aromatic frameworks and an ionic liquid, the fiber exhibited a high adsorption capacity for organochlorine pesticides. Under optimized experimental conditions, enhancement factors of 247-1696 were obtained with good linearity in the range of 1-500 mu g L-1. The detection limits and quantification limits were determined to be in the range of 0.11-0.29 mu g L-1 and 0.35-0.93 mu g L-1. The relative standard deviations for six replicates of organochlorine pesticides were in the range of 4.4%-7.2% and 5.7%-10.1% for one fiber and fiber-to-fiber, respectively. By coupling with a gas chromatography-electron capture detector, the novel fiber was successfully used for the determination of organochlorine pesticides in juice and milk samples with recoveries of 76.1%-121.3%.
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