Sampling Techniques for Capillary GC

Abstract

The sampling technique is seldom regarded as a problem in packed column GC. In capillary GC, however, there is a considerable variety of injection techniques, and each of them has its range of applications. On one hand this means greater flexibility allowing one a better chance of finding a technique which produces more accurate results than by packed column GC. On the other hand one needs more knowledge and experience to choose the appropriate sampling method for a particular application. Furthermore, one must know the working rules and the limitations of these injection techniques. This paper reviews three important sampling methods and the special techniques involved in their proper use.