実験ワンポイント
広い密度・圧力領域における超臨界流体に対する精密密度測定の新しい方法
2006 年 16 巻 4 号 p. 379-380
詳細
2006 年 16 巻 4 号 p. 379-380
We have developed two methods to determine the density of supercritical fluid sealed in a tube. One is the mass-volume method that is applicable to higher densities than 0.07 g cm-3 at 400°C when the fluid is water. In this method, the mass of the sample and the bore volume of the tube are determined precisely. The other is the chemical shift method, which takes advantage of the temperature dependence of the chemical shift and the PVT data. The latter is especially powerful at lower densities.
