Characterization of glass,quartz, and fused silica capillary column surfaces from contact-angle measurements |
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| Authors: | K D Bartle B W Wright M L Lee |
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| Institution: | (1) Department of Chemistry, Brigham Young University, 84602 Provo, Utah, USA;(2) Present address: Department of Physical Chemistry, The University of Leeds, LS2 9JT Leeds, U.K. |
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| Abstract: | Summary This paper describes the systematic characterization of glass and the newly introduced fused silica and quartz capillary columns from surface wettability measurements. Common gas chromatographic stationary phases were used in capillary-rise measurements at temperatures up to 300°C. By construction of Zisman plots and using the Cassie equation, the relative surface concentrations of wettable and non-wettable groups were determined. By application of the Fowkes equation, the dispersion force component of the surface energy was investigated. The influence of various surface treatments such as leaching, silylation, and polymeric film formation are discussed. Wettability measurements were also used to evaluate the thermostability of various treated surfaces and to compare the surface properties of glass, quartz, and fused silica. The wettability of the surfaces with selected stationary phases as a function of temperature is also discussed. |
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| Keywords: | Gas chromatography Capillary columns Fused silica Contact angle Wettability |
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