A tube radial distribution chromatography (TRDC) method based on phase-separated multiphase flow created through phase transformation via temperature change has been developed. These systems typically required a temperaturecontrolling device containing a water bath and a stirrer. Herein, we proposed a novel TRDC system without a cooling device, where the phase transformation was achieved via pressure loss in a capillary tube of 50 μm inner diameter and 550 cm length. Model analytes were successfully separated with the developed TRDC system, which provided a simplified platform and helped to clarify the operating principle of TRDC based on phase transformation in a capillary tube.
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