Analytical Sciences

Column Switching Analysis with Packed-Capillary Columns in Gas Chromatography

Ikuo UETA,* Kazuya TAKAHASHI,** and Yoshihiro SAITO**

*Department of Applied Chemistry, University of Yamanashi, 4-3-11 Takeda, Kofu 400-8511, Japan
**Department of Environmental and Life Sciences, Toyohashi University of Technology, Toyohashi 441-8580, Japan

By introducing sequentially connected two packed-capillary columns, a wide range of volatile compounds were successfully separated in gas chromatography. The hyphenation of two packed-capillary columns of 1.0 mm i.d. was accomplished using a conventional 6-port valve, where the temperature of each column was individually controlled in the respective column ovens. These columns were prepared with two different types of sorbents, each having a different selectivity, in order to separate a wide range of compounds, including permanent gases, volatile alcohols and other typical volatile organic compounds. With a simple valve switching operation, the complex sample mixtures were rapidly separated and detected.

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