Novel fused silica capillary columns: Surface modification through controlled doping of the preform-tube
✍ Scribed by Anthony, L. J. ;Soto, L. ;Heffner, S. A. ;Holland, R. A. ;Simpson, J. R. ;Kosinski, S. G.
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- English
- Weight
- 492 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0935-6304
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✦ Synopsis
difficult to prepare capillaries for adsorption chromatography or to increase the surface area andlor energy by roughening the surface.
A method has been developed for fabricating fused silica capillary columns which have specificsurface properties but still retain the excellent strength, flexibility, and resilience of pure fused silica. By using the Modified Chemical Vapor Deposition process (MCVD), typicallyusedfortheproductionof optical fiber lightguides, inorganic dopants such as Al, Nd, Ge, and P can be introduced into the preform-tube by MCVD. Doped columns have a wide range of specific surface properties, and columns with undoped fused silica prepared by MCVD are more chemically inert and less acidic than columns prepared by conventional methods. This paper describes the method for fabricating capillaries and the initial studies to characterize them.