ガスクロ法を用いたガス・蒸気 (水蒸気・VOC蒸気) ・液体等透過率測定装置

First gas transmission rate analyzer based on gas chromatography was marketed in 1970 in Japan after application of patent. The method has been widely applied for transmission test of gas, vapor (vapor of water and organic solvents), liquid transmission test using PV cell method, and it is expanding the applications of PV cell too. Why the method is widely accepted and evaluated by customers is depending upon the diversity of gas transmission rate analysis method coupled with gas chromatography which can analyze even the mixed gases in permeated gas.Considering US EPA's requirement to strengthen automotive evaporative emission, the method may be more useful mean to test transmission of gasoline through high barrier materials and to evaluate high polymer electrolysis membrane (using moisturizing technique of both rooms of permeation cell to measure transmitted hydrogen). This testing system will be more widely applied and an essential tool for research and development work.