Tube Radial Distribution Chromatography on a Microchip Incorporating Microchannels with a Three-to-One Channel Confluence Point.

Analytical sciences : the international journal of the Japan Society for Analytical Chemistry

PubMedID: 26656816

Suzuki N, Yamashita K, Maeda H, Hashimoto M, Tsukagoshi K. Tube Radial Distribution Chromatography on a Microchip Incorporating Microchannels with a Three-to-One Channel Confluence Point. Anal Sci. 2015;31(12):1267-72.
We developed a capillary chromatography system using a phase-separated solvent mixture as a carrier solution-i. e. , a water-hydrophilic/hydrophobic organic solvent mixture-which we call "tube radial distribution chromatography" (TRDC). Here, we attempted to apply the TRDC system to a microchip incorporating microchannels with a double T-junction for injection of analyte solution and a three-to-one, narrow-to-wide channel confluence point for tube radial distribution phenomenon (TRDP) at room temperature. A ternary mixed solvent of water, acetonitrile and ethyl acetate was used as a carrier solution. TRDP in the wide microchannel was examined using various flow rates, temperatures, and component solvent ratios. Successful observation was carried out using a fluorescence microscope-CCD camera. Model analytes perylene (hydrophobic) and Eosin Y (hydrophilic) were separated by flowing through the microchannel, without any treatment such as packed columns or coating, at room temperature (25°C).