Chang Wei, Korenaga Takashi
Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji, 192-0397 Tokyo, Japan.
Anal Bioanal Chem. 2006 Jul;385(6):1149-52. doi: 10.1007/s00216-006-0525-z. Epub 2006 Jun 14.
Monolithic silica with a bimodal pore structure was prepared in a fused silica capillary by the sol-gel process and investigated as an adsorbent for the preconcentration of airborne trichloroethylene and tetrachloroethylene. The airborne trichloroethylene and tetrachloroethylene are adsorbed when they flow through the silica capillary column and can be desorbed by liquid hexane followed by GC/MS analysis. The monolithic silica adsorbent is mechanically stable and no frits or other special structures are needed to retain them in place. In addition, owing to the smaller size of the capillary column, only a small volume of desorption solvent is needed. The present investigation demonstrates the satisfactory applicability of monolithic silica as a capillary adsorbent.
通过溶胶-凝胶法在熔融石英毛细管中制备了具有双峰孔结构的整体硅胶，并将其作为吸附剂用于空气中三氯乙烯和四氯乙烯的预浓缩研究。空气中的三氯乙烯和四氯乙烯流经硅胶毛细管柱时被吸附，随后可用液体己烷解吸，然后进行气相色谱/质谱分析。整体硅胶吸附剂机械稳定性良好，无需使用筛板或其他特殊结构来固定它们。此外，由于毛细管柱尺寸较小，仅需少量解吸溶剂。本研究证明了整体硅胶作为毛细管吸附剂具有令人满意的适用性。
