ABSTRACT
There are two types of packing employed in GC; the first is used as an adsorbent stationary phase, largely in GSC for the analysis of gases or low boiling materials; the second is merely a support on which the stationary phase is coated and is used for all types of GLC analyses. The effective use of polymeric materials for chromatographic purposes started to become established with the introduction of macro-porous polymers in the early 1960s. In an attempt to completely eliminate adsorption effects from the support, Teflon was explored as a possible alternative to a diatomaceous earth. The first capillary columns were fabricated from copper tubing 0.01 in I.D. but due to their somewhat variable geometiy were replaced with the more rigid cupronickel tubing and subsequently by stainless steel tubing. There are two basic methods for coating the stationary phase on a capillary column the dynamic method of coating and the static method of coating.
