FOAM COUNTERCURRENT CHROMATOGRAPHY ON VARIOUS TEST SAMPLES AND THE EFFECTS OF ADDITIVES ON FOAM AFFINITY

Foam countercurrent chromatography has been applied to various samples using sodium dodecyl sulfate (SDS), cetyl pyridinium chloride (CPC), and polyoxyethylene-23-lauryl ether (POELE) as foaming reagents. Overall results clearly indicate that the positively charged samples collected with SDS foam and the negatively charged samples with CPC. None of the applied samples showed affinity to POELE. Addition of hydrochloric acid or sodium hydroxide to the surfactant solution effectively reduced the foam affinity of CPC or SDS, respectively, while NaCl at a high concentration of 0. 1M showed similar inhibitory action to both surfactants.