高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (6): 1160.

• 研究论文 • 上一篇    下一篇

SPME 涂层中硅烷化反应机理的研究

栾天罡1, 张展霞2   

  1. 1. 中山大学生命科学学院, 生物防治国家重点实验室;
    2. 中山大学化学系, 广州 510275
  • 收稿日期:2001-09-28 出版日期:2002-06-24 发布日期:2002-06-24
  • 通讯作者: 栾天罡(1971年出生),男,博士,讲师,主要从事污染生态学研究.E-mail:cesltg@zsu.edu.cn E-mail:cesltg@zsu.edu.cn
  • 基金资助:

    中山大学青年教师科研启动基金资助

Mechanism of Gas-phase Silylation on Fiber Coating Following Solid Phase Microextraction

LUAN Tian-Gang1, ZHANG Zhan-Xia2   

  1. 1. School of Life Science, State Key Laboratory for Biocontrol;
    2. Department of Chemistry, Sun Yet Sen University, Guangzhou 510275, China
  • Received:2001-09-28 Online:2002-06-24 Published:2002-06-24

PDF (PC)

被引次数

11

摘要： 建立了SPME 涂层中硅烷化衍生化样品预处理方法,并用于葡萄酒中白黎芦醇的测定.SPME 硅烷化的反应动力学过程研究表明,涂层中硅烷化反应遵循假一级反应动力学,高温条件下硅烷化试剂会破坏极性聚丙烯酯(PA)涂层.

关键词: 固相微萃取(SPME ), 气相色谱-质谱法, 衍生化, 硅烷化反应动力学

Abstract: The silylation of polar analytes on the polymeric coating of SPME fiber could be performed directly by placing the fiber into the headspace of bis(trimethylsilyl)trifluoroacetamide(BSTFA) after SPME . The derivatization was carried out at room temperature without damaging the fiber. Compared with the diazomethane-SPME technique, it is a simpler, cheaper and environmental friendly. The kinetics of the reaction of silylation on SPME fiber coating was studied. The result indicated that the silylation was of pseudo first order kinetics. The reaction depends on the analytes concentration in the fiber coating. The experimental results also show that the new fiber coating has a high extraction efficiency for polar compounds but non-reactive with derivatizing reagents could be found.

Key words: Solid phase microextraction, GS-MS spectrography, Derivation, Silylation reaction kinetics

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