立山地域における揮発性有機化合物(VOCs)調査

概要

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We previously reported the investigation of 20 ingredients of VOCs at the Tateyama Murodo (altitude : 2,450m) and Tateyama Gondola (altitude : 1,180m) in Mt. Tateyama area from August to October 2007 [J. Environ. Chem., 19, 41-54 (2009)]. In the present work, a newly introduced GC-MS with a high sensitivity was applied to analyze 30 ingredients in VOCs sampled from the same area from August 16 to October 30 in 2009. Twenty-five components of 30 VOCs were detected, and benzene, toluene, and ethyl benzene showed higher average values among the detected VOCs. From the result of back trajectory analysis, the East Asia source occupied 48% at Tateyama Murodo and 37% at Tateyama Gondola. The average value of all VOCs at both points were lower than those at urban areas. We have compared the concentrations at both measuring points with the background data at Cape Hedo in Okinawa. Although the concentration of toluene was almost equal to or slightly lower than that of Cape Hedo, the other detected VOCs had a concentration equivalent or slightly higher than Cape Hedo. It was found that benzene/toluene ratios of the East Asia source were higher than those of the other sources.
日本エアロゾル学会の論文