Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1345, Issue -, Pages 29-36Publisher
ELSEVIER
DOI: 10.1016/j.chroma.2014.04.029
Keywords
Multiple monolithic fiber solid-phase microextraction (MMF-SPME); Monoliths; Sorbents; Solid-phase extraction; Chlorophenols
Funding
- National Natural Science Foundation of China [21377105, 21077085]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
- New Century Excellent Talents in Fujian Province University
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A novel multiple monolithic fiber solid-phase microextraction (MMF-SPME) was designed and prepared. Two steps were involved in the preparation of MMF-SPME. Firstly, single thin fiber (0.5 mm in diameter) was prepared by co-polymerization of vinylimidazole and ethylene dimethacrylate. Secondly, several thin fibers were bound together to obtain the MMF assembly. The extraction and desorption dynamics of MM-FSPME with different numbers of fibers were studied in detail. In order to demonstrate the usability of the new MMF-SPME, the extraction performance of MMF-SPME for 2-chlorophenol, 2,4-dichlorophenol, 2,4,6-trichlorophenol and pentachlorophenol was investigated in direct SPME mode. Results indicated that aqueous samples could form convection effectively within MMF-SPME because there were gaps between fibers. The extraction procedure was accelerated by the convection. At the same time, the MMF-SPME possessed high extraction capacity because more sorbent was employed. Under the optimized extraction conditions, low detection limits (S/N=3) and quantification limits (S/N = 10) for the target analytes were achieved within the range of 0.13-0.29 mu g/L and 0.44-0.98 mu g/L, respectively. The MMF-SPME also showed a very long lifespan and good repeatability. Finally, the MMF-SPME was successfully applied to the analysis of tap, lake and ground water samples with spiked recoveries in the range of 73.8-101%. (C) 2014 Elsevier B.V. All rights reserved.
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