Application of a monolithic silica capillary adsorbent for the preconcentration of airborne trichloroethylene and tetrachloroethylene |
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Authors: | Wei Chang Takashi Korenaga |
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Institution: | (1) Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji, 192-0397 Tokyo, Japan |
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Abstract: | 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. |
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Keywords: | Monolithic silica Gas preconcentration GC/MS |
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