4.5 Article

Preparation of cyano-functionalized multiwalled carbon nanotubes as solid-phase extraction sorbent for preconcentration of phenolic compounds in environmental water

期刊

JOURNAL OF SEPARATION SCIENCE
卷 35, 期 15, 页码 1967-1976

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201200045

关键词

Cyano-functionalized multiwalled carbon nanotubes; Environmental water; Phenolic compounds; Solid-phase extractant

资金

  1. Guangzhou Associated & Service Center of Scientific Instrument
  2. Shantou University [NTF10002]
  3. Natural Science Foundation of Guangdong Province [S2011010005208]
  4. Science & Technology Project of Guangdong Province [2010A080403003]

向作者/读者索取更多资源

In the present work, we showed a novel method to synthesize cyano-functionalized multiwalled carbon nanotubes (MWCNTs-CN) and utilize it as a solid-phase extraction sorbent for preconcentration of phenolic compounds in environmental water samples. MWCNTs-CN was synthesized through surface functionalization of multiwalled carbon nanotubes (MWCNTs). The functional groups on the surface of modified MWCNTs were characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis and scanning electron microscopy. The analytical procedure was based on a conventional solid-phase extraction step for which 100 mg of MWCNTs-CN were packed in a 3 mL polypropylene cartridge. Analytes were thus isolated and preconcentrated from the pretreated samples and subsequently detected on high-performance liquid chromatography-ultraviolet detection. The results showed the proposed method exhibited good sensitivity and precision for the extraction and elution of analytes. The limit of detections (S/N = 3) of the method were 0.45, 0.09, 0.08, and 3.00 ng mL-1 for p-chlorophenol, 1-naphthol, 2-naphthol, and 2,4-dichlorophenol, respectively. The mean relative recoveries (n = 3) were between 80.28 and 103.13%, and the repeatability (RSD = 5.10%) and reproducibility (RSD = 7.68%) were accepted. This developed method was applied to determine phenolic compounds in environmental water samples. There is a positive result only for 2-naphthol with concentration of 0.38 ng mL-1 in seawater sample.

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