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Electropolymerized multiwalled carbon nanotubes/polypyrrole fiber for solid-phase microextraction and its applications in the determination of pyrethroids |
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| Authors: | Chen Liangbi Chen Wenfeng Ma Chunhua Du Dan Chen Xi |
| Affiliation: | a Department of Chemistry and Environment Engineering, Wuyi University, Fujian 354300, China b State Key Laboratory of Marine Environmental Science, Xiamen University, Siming South Rd. 422, Xiamen 361005, China c Third Institute of Oceanography, State Oceanic Administration, Xiamen, Fujian, China d Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, Central China Normal University, Wuhan 430079, China |
| Abstract: | A novel solid-phase microextraction (SPME) fiber coated with multiwalled carbon nanotubes/polypyrrole (MWCNTs/Ppy) was prepared with an electrochemical method and used for the extraction of pyrethroids in natural water samples. The results showed that the MWCNTs/Ppy coated fiber had high organic stability, and remarkable acid and alkali resistance. In addition, the MWCNTs/Ppy coated fiber was more effective and superior to commercial PDMS and PDMS/DVD fibers in extracting pyrethroids in natural water samples. Under optimized conditions, the calibration curves were found to be linear from 0.001 to 10 μg mL−1 for five of the six pyrethroids studied, the exception being fenvalerate (which was from 0.005 to 10 μg mL−1), and detection limits were within the range 0.12-0.43 ng mL−1. The recoveries of the pyrethroids spiked in water samples at 10 ng mL−1 ranged from 83 to 112%. |
| Keywords: | Solid-phase microextraction Multiwalled carbon nanotubes Polypyrrole Pyrethroids Gas chromatography |
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