| 摘要 |
PROBLEM TO BE SOLVED: To provide a method wherein, in a structure capable of concentrating and collecting a total quantity of head space gas after vapor-liquid equilibrium into an adsorbent, evaporation of a solvent in sample liquid is suppressed by setting the sample liquid at a fixed low temperature (40-50°C), stirring is performed by introducing high purity gas from a bottom part, and a pressure of the head space gas is kept constant at 0.2-0.3 Mpa by the gas pressure, to thereby concentrate and collect the quantity of the head space gas 60-180 times as much as the quantity in a conventional method into the adsorbent with excellent reproducibility. SOLUTION: A system has a sealed container 9 for vapor-liquid equilibrium having a structure capable of moving vertically the bottom surface of the sealed container used in a conventional head space method, which is a structure wherein a vertically driving plunger 10 having a material and a structure moving vertically and smoothly withstanding a pressure of 0.3 Mpa or higher in a heating state at 50°C is provided, and the high purity gas is introduced from a bottom part of the vertically driving plunger 10 in order to stir the sample liquid or to pressurize the head space gas. COPYRIGHT: (C)2009,JPO&INPIT
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