Comparison of the Analytical Capabilities of Different Chromatomembrane Gas Extraction Techniques

The analytical capabilities of various schemes of the relative movement of the flows of an analyzed aqueous phase and an extractant gas in chromatomembrane gas extraction were compared. It was demonstrated that a direct-flow scheme is preferable when the efficiency of the system increases with the flow rate of the extractant gas (online analysis), whereas a two-dimensional scheme is preferable in the analysis of preliminarily selected samples.