Preparation of Capillary Gas Chromatographic Columns with High Thermal Stability by Sol-gel Method

Abstract

Abstract: Perethylated-β-CD, perpentylated-β-CD and 2,6-di-O-pentyl-β-CD were coated onto the fused silica capillary by sol-gel process. The thermal stability of the three sol-gel columns was investigated by pyrolysis gas chromatography(PyGC). The PyGC results show that the sol-gel CDs columns have an outstanding thermal stability, compared with the conventional CDs columns. The temperature of preliminary pyrolysis of the CDs in sol-gel net can be as high as 300 ℃, of the alkylated-β-CDs are at 200℃. The column performances were also studied. The results show that the sol-gel CDs columns have a good separation ability to the disubstituted benzene isomers such as cresols and xylene isomers.

Key words: Pyrolysis gas chromatography, Sol-gel, Thermal stability, Cyclodextrin

CLC Number:

O658

TrendMD:

LIANG Min-Min, QI Mei-Ling, FU Ruo-Nong, SHAO Qing-Long . Preparation of Capillary Gas Chromatographic Columns with High Thermal Stability by Sol-gel Method[J]. Chem. J. Chinese Universities, 2004, 25(11): 2016.

References

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