Polare Imprägnierung von Glaskapillaren für die Gas‐Chromatographie

Abstract

Abstract According to the experience of various authors, glass capillaries used as columns for gas chromatography can be coated only with non‐polar liquids such as squalane and apiezon. This paper shows that polar liquids form a coherent film on a glass surface which has first been covered by an approx. 0.001 μ layer of carbon black. Several methods for producing these layers are described. Such pretreated glass capillaries show equal or better separation efficiencies than steel capillaries and work at lower temperatures, due to their lower adsorption activity.