高圧水蒸気キャリヤーガス気-固クロマトグラフィー

概要

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Gas-solid chromatography using steam pressurized up to 10 MPa at a column temperature of 350 ℃ was studied. The high pressure steam was generated continuously by pumping a constant flow of water into a heated precolumn. The carrier steam pressure was adjusted between atmospheric pressure and saturation pressure at the column temperature with a needle valve connected at the end of the separation column. The retention times of the samples (e.g., polyethylene glycols, higher carboxylic acids, etc.) decreased significantly as the pressure increased even with carrier steam having the same mass flow rate. For example, when the carrier steam pressure was raised from 6.5 MPa to 8.5 MPa at a column temperature of 340 ℃ (P_<sat> = 14.4 MPa), the retention times of the applied samples were shortened to fifth or sixth of the initial ones ; and tailing phenomena, if they existed, were reduced to a great extent.
社団法人日本分析化学会の論文
1984-11-05