水系試料中VOCsのGC-MS分析ための螺旋管を用いる気液向流接触抽出濃縮導入装置の開発

概要

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A novel system based on continuous gas-liquid counter-current flow extraction has been developed to determinate trace volatile organic components in aqueous samples. Under different conditions, the gas-liquid partition of 2-methylisoborneol and geosmin is theoretically described using this system. The results demonstrate that their mass transfer can be achieved at a level of the theoretical values; therefore, its extraction efficiencies are far higher than those of purge-and-trap (PT). To resolve problems with time-consuming of the headspace having a multi extraction-trapping mode, this methodology is also applied to an on-line monitoring system of musty odor substances in river water. Finally, the novel system is capable of determining musty odor substances in river water with high turbidity, and volatile organic compounds in aqueous samples, such as milk and beverages containing foaming substances, although applying the PT system is difficult for these samples.