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Solid-phase microfibers based on modified single-walled carbon nanotubes for extraction of chlorophenols and organochlorine pesticides

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Abstract

Solid-phase microextraction (SPME) based on carboxylated single-walled carbon nanotube fibers was used to extract several chlorophenols (CPs) and organochlorine pesticides (OCPs) from aqueous samples prior to their determination by GC with electron capture detection. The main parameters affecting microextraction (temperature, time, stirring rate and salting-out effect) and the conditions of the thermal desorption in the GC injector were optimized. Compared with commercial SPME fibers, the fiber presented better selectivity and sensitivity. Linear response was found for the concentration range between 2 and 1000 ng L−1 (20–1000 ng L−1 for CPs), and the limits of detection were in the range from 0.07 to 4.36 ng L−1. The repeatability expressed as relative standard deviation ranged from 4.1 % to 8.2 % and the fiber-to-fiber reproducibility for four prepared fibers was between 6.5 % and 10.8 %. The method was successfully applied to the analysis of CPs and OCPs in lake water and waste water samples. Recovery was tested with spiked lake water and waste water samples, with values ranging from 89.7 % to 101.2 % in case of waste water samples.

Raman spectra: (A) SWNTs, and (B) Oxidized SWNTs

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Acknowledgements

The authors wish to express their gratitude to Chang-Wen Ye, Yan-Chun Huang and Li-Hong Qin of Huazhong Agricultural University for the instrumental assistance in this work.

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Authors and Affiliations

  1. College of Food Science &Technology, Huazhong Agricultural University, Wuhan, 430070, China

    Yin Sun & Cheng-Ming Wang

  2. Shenzhen Entry-Exit Inspection and Quarantine Bureau, Shenzhen, 518045, China

    Wei-Ya Zhang

  3. College of Chemistry and Molecular Science, Wuhan University, Wuhan, 430072, China

    Jun Xing

Authors
  1. Yin Sun
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  2. Wei-Ya Zhang
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  3. Jun Xing
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  4. Cheng-Ming Wang
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Correspondence to Cheng-Ming Wang.

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Sun, Y., Zhang, WY., Xing, J. et al. Solid-phase microfibers based on modified single-walled carbon nanotubes for extraction of chlorophenols and organochlorine pesticides. Microchim Acta 173, 223–229 (2011). https://doi.org/10.1007/s00604-010-0526-7

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  • DOI: https://doi.org/10.1007/s00604-010-0526-7

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