GLASS-CAPILLARY COLUMNS COATED WITH NON-SOLUBLE METHYL SILICONE GUMS

When used as stationary phases in glass capillary columns, films formed from gums are generally more stable than liquid phases. The stability indicates that a high column efficiency can be maintained at elevated temperatures, column bleeding is low and the column lifetime is long. In this paper we present a method for increasing further the gum film stability by using gums with a higher degree of cross-linking. Such gums are not soluble in commonly used solvents and are therefore synthesized in situ. In addition, measures have been taken to promote chemical bonding between glass and polymer. The columns have been used successfully for the routine analysis of polyaromatic hydrocarbons. © 1979.