STATIC COATING OF CAPILLARY COLUMNS - SOME PRACTICAL CONSIDERATIONS

Some of the practical problems involved in the preparation of wall-coated open tubular (WCOT) glass columns have been examined, and precautions are described to overcome or minimize these problems when non-polar silicone gums are used as the stationary phase. Modifications have been made that simplify the preparation of WCOT columns. The labour involved in cleaning an old column and recoating it amounts to about 2 h work, plus monitoring those steps that proceed automatically. About half this time is spent in cleaning the old column. © 1979.