水に溶解した二酸化炭素のガスクロマトグラフィーによる簡易定量法

概要

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A simple method to determine concentration of CO_2 in water is studied. The CO_2-dissolved aqueous sample is introduced into a vessel to contact with air free from CO_2. Thus the gas phase is made in equilibrium with the liquid phase. The concentration in the gas phase is determined by gas chromatography. The concentration in the original sample is then calculated by the use of Henry's constant. The detailed procedures are described in the text. To investigate the accuracy of the present method, Henry's constants of CO_2 for several temperatures are determined by using a gas sample whose CO_2 concentration is known.The constants agree with the values in literatures. The present method is simpler both in operation andin apparatus than the conventional methods which use gas chromatography. Concentrations of other water-dissolved gases can also be determined by this methodif Henry's constant of the system is known.
社団法人日本分析化学会の論文
1982-08-05