Journal
JOURNAL OF SEPARATION SCIENCE
Volume 40, Issue 24, Pages 4773-4779Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201700975
Keywords
high performance liquid chromatography; ionic liquids; online analysis; polycyclic aromatic hydrocarbons; solid-phase microextraction
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Funding
- Shandong Provincial Natural Science Foundation of China [ZR2017MB043]
- National Natural Science Foundation of China (NSFC) [21405061, 21777054]
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An in-tube solid-phase microextraction device was developed by packing poly(ionic liquids)-coated stainless-steel wires into a polyether ether ketone tube. An anion-exchange process was performed to enhance the extraction performance. Surface properties of poly(ionic liquids)-coated stainless-steel wires were characterized by scanning electron microscopy and energy dispersive X-ray spectrometry. The extraction device was connected to high-performance liquid chromatography equipment to build an online enrichment and analysis system. Ten polycyclic aromatic hydrocarbons were used as model analytes, and important conditions including extraction time and desorption time were optimized. The enrichment factors from 268 to 2497, linear range of 0.03-20 mu g/L, detection limits of 0.010-0.020 mu g/L, extraction and preparation repeatability with relative standard deviation less than 1.8 and 19%, respectively were given by the established online analysis method. It has been used to detect polycyclic aromatic hydrocarbons in environmental samples, with the relative recovery (5, 10 mu g/L) in the range of 85.1-118.9%.
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