Optimization of Nonequilibrium Liquid-Phase Microextraction for the Determination of Nitrobenzenes in Aqueous Samples by Gas Chromatography-Electron Capture Detection

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著者

    • Zhao Rusong ZHAO Rusong
    • Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences
    • Chu Shaogang CHU Shaogang
    • Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences
    • Xu Xiaobai XU Xiaobai
    • Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences

抄録

In the present work, a novel method for the determination of nitrobenzenes in water has been described. It is based on nonequilibrium liquid-phase microextraction and gas chromatography-electron capture detection (GC-ECD). Extraction conditions such as solvent selection, organic solvent dropsize, stirring rate, content of NaCl and extraction time were found to have significant influence on extraction efficiency. The optimized conditions were 1.5 µl toluene and 20 min extraction time at 400 rpm stirring rate without NaCl addition. The linear range was 0.1 - 50 µg l<sup>-1</sup> for most nitrobenzenes. The limits of detection (LODs) ranged from 0.02 µg l<sup>-1</sup> (for 2.6-DNT) to 0.4 µg l<sup>-1</sup> (for NB); and relative standard deviations (RSD) for most of the nitrobenzenes at the 10 µg l<sup>-1</sup> level, except for 2,6-DNT in 3 µg l<sup>-1</sup>, were below 10%. Natural samples collected from Miyun Reservoir and tap water samples from a laboratory were successfully analyzed using the proposed method, but none of the analytes were detected. The relative recoveries of spiked water samples (at the 10 µg l<sup>-1</sup> level except for 2,6-DNT in 3 µg l<sup>-1</sup>) were from 82.6 to 118.7%.

収録刊行物

  • Analytical sciences : the international journal of the Japan Society for Analytical Chemistry

    Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 20(4), 663-666, 2004-04-10

    The Japan Society for Analytical Chemistry

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各種コード

  • NII論文ID(NAID)
    10012850820
  • NII書誌ID(NCID)
    AA10500785
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    09106340
  • NDL 記事登録ID
    6912092
  • NDL 雑誌分類
    ZP4(科学技術--化学・化学工業--分析化学)
  • NDL 請求記号
    Z54-F482
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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