Analytical Sciences

Polymer-Coated Fibrous Stationary Phases in Packed-Capillary Gas Chromatography

Yoshihiro SAITO,* Ai TAHARA,* Mitsuhiro OGAWA,* Motohiro IMAIZUMI,* Kazuhiro BAN,* Hiroo WADA,** and Kiyokatsu JINNO* 

*School of Materials Science, Toyohashi University of Technology, Toyohashi 441-8580, Japan
**Shinwa Chemical Industries, Ltd., 50 Kagekatsu-cho, Fushimi-ku, Kyoto 612-8307, Japan

Fibrous synthetic polymers have been introduced as the support material for packed capillaries in gas chromatography. The filaments of the polymers were packed longitudinally into a fused-silica capillary, followed by the conventional coating process for open-tubular capillaries. With various polysiloxane-based polymeric materials coated onto these filaments, it was demonstrated that the retentivity was significantly improved over conventional wall-coated capillaries of the same length and that the selectivity can be tuned by selecting different coating materials chosen for the various purposes. The results clearly showed the contribution of the fibrous support and the polymer-coating to the retention of analytes. They also showed the bright possibility for a novel usage of fine fibrous polymers as the support material, which can be combined with a newly-synthesized coating materials designed for particular separations.

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