Sample Preparation Perspectives
Confusion exists on the quantitative nature of headspace sampling, because it is an equilibrium-based technique when done in the static mode, but not necessarily in the dynamic mode. To aggravate matters further, the concentrations of headspace compounds in common applications, like foods, flavours, or petroleum distillates, can easily vary by an order of magnitude or more. Thus, what defines quantitative may depend largely on the goals of the analysis. This month we’ll take a look at headspace sampling and its quantitative nature.