熱検出-液体クロマトグラフィーによる水溶液中のアルコールの定量

概要

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Determination of alcohol in aqueous solution was studied by using a thermistor inserted in the detector column. Among various packing agents for detector column examined, including cation exchange resin, anion exchange resin, active carbon, active alumina and Celite-408, H-type cation exchange resin (Dowex 50W-X8) had the highest sensitivity. When the sample solution contained inorganic salts, they were removed by passing the solution through a column packed with a mixture of cation- and anion exchange resins. In the practical procedure, the sample solution was fed to the top of separation column by a micro-injector. The plot of peak height on thermograms vs. concentration of methanol was quite linear. The recommended conditions were as follows. Eluting agent : distilled water, flow rate : 0.78ml/min., packing agent of detector : Dowex 50W-X8 (100150 meshes), detector sens. : 1/100°C, and detector temp. : 30°C. When 0.350 ml of 1% methanol was injected, the peak height on thermogram was 7.74 cm.
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