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A new solid-phase extraction disk based on a sheet of single-walled carbon nanotubes

Analytical and Bioanalytical Chemistry volume 392, pages 927–935 (2008)Cite this article

Abstract

A new kind of solid-phase extraction disk based on a sheet of single-walled carbon nanotubes (SWCNTs) is developed in this study. The properties of such disks are tested, and different disks showed satisfactory reproducibility. One liter of aqueous solution can pass through the disk within 10–100 min while still allowing good recoveries. Two disks (DD-disk) can be stacked to enrich phthalate esters, bisphenol A (BPA), 4-n-nonylphenol (4-NP), 4-tert-octylphenol (4-OP) and chlorophenols from various volumes of solution. The results show that SWCNT disks have high extraction ability for all analytes. The SWCNT disk can extract polar chlorophenols more efficiently than a C18 disk from water solution. Unlike the activated carbon disk, analytes adsorbed by the new disks can be eluted completely with 8–15 mL of methanol or acetonitrile. Finally, the DD-disk system is used to pretreat 1000-mL real-world water samples spiked with BPA, 4-OP and 4-NP. Detection limits of 7, 25, and 38 ng L−1 for BPA, 4-OP, and 4-NP, respectively, were achieved under optimized conditions. The advantages of this new disk include its strong adsorption ability, its high flow rate and its easy preparation.

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Acknowledgements

This work was jointly supported by the National Basic Research Program of China (2003CB415001); the National Natural Science Foundation of China (20475060, 20621703) and the Major Research Program of the Chinese Academy of Sciences (KZCX2-YW-420-1).

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Affiliations

  1. State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing, 100085, China

    Hong Yun Niu, Ya Qi Cai, Ya Li Shi & Gui Bin Jiang

  2. China National Environmental Monitoring Center, Beijing, 100029, China

    Fu Sheng Wei

  3. Department of Chemistry, University of Science and Technology Beijing, Beijing, 100083, China

    Jie Min Liu

  4. Chinese Academy of Sciences, Research Center for Eco-Environmental Sciences, P.O. Box 2871, Beijing, 100085, China

    Ya Qi Cai

Authors
  1. Hong Yun Niu
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  2. Ya Qi Cai
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  3. Ya Li Shi
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  4. Fu Sheng Wei
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  5. Jie Min Liu
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  6. Gui Bin Jiang
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Corresponding authors

Correspondence to Ya Qi Cai or Fu Sheng Wei.

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ESM 1

Data and chromatographic conditions for the model compounds; the figure shows the effect of flow rate on extraction efficiency. (PDF 93.2 KB)

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Niu, H.Y., Cai, Y.Q., Shi, Y.L. et al. A new solid-phase extraction disk based on a sheet of single-walled carbon nanotubes. Anal Bioanal Chem 392, 927–935 (2008). https://doi.org/10.1007/s00216-008-2332-1

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  • DOI: https://doi.org/10.1007/s00216-008-2332-1

Keywords

  • Solid-phase extraction disk
  • Single-walled carbon nanotube sheet
  • C18 disk
  • Activated carbon disk
  • Large-volume water sample