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Effect of viscosity on stationary phase stability in capillary column gas chromatography

✍ Scribed by Wright, B. W. ;Peaden, P. A. ;Lee, M. L.

Publisher
John Wiley and Sons
Year
1982
Tongue
English
Weight
355 KB
Volume
5
Category
Article
ISSN
0935-6304

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✦ Synopsis

Abstract

With recent advances in column technology it is now possible to prepare highly efficient, very inert, and thermally stable capillary columns coated with nonpolar polysiloxane stationary phases. Unfortunately, the same degree of success has not been achieved for some of the more polar polysiloxane phases. A parameter that has been studied little in the past in relation to stationary phase film stability is the viscosity of the stationary phase. In this paper the efficiency and stability of coated columns are correlated to the viscosity of the phase. Due to their structure, the viscosity of the phenyl‐containing polysiloxanes change rapidly with temperature and hence, thin‐film coatings are not stable at elevated temperatures. By using high viscosity phenyl‐containing methylphenylpolysiloxanes which were recently synthesized, efficient and stable columns have been prepared.

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