<報文>大気中ハロゲン化炭化水素の自動分析

概要

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As a step of developing the automatic analyzing system for the air pollutants, that for halogenated hydrocarbons was investigated. In this paper the method and the analytical results about the urban atmosphere were shown. This system consists of a 6-way cock, a concentration tube packed with Tenax-GC and active carbon, a fused silica capillary column (crosslinked phenylmethyl silicone）, and an electron capture detector. The analytical processes were controlled by a micro process or within the HP-5840A gas chromatograph. The 265 data in each a week in the summer and winter were obtained. Then, six components, such as CCl3f, CHCl3, CH3CCl3, CCl4, CHCl=CCl2 and CCl2＝CCl2, were measured and were statistically explained. For example, With regard to trichloroethylene, the coefficient of variation of its concentrations was larger than that of the other trihalomethanes and the background level in the air was fairy high compared with hydrocarbons related with the autoexhaustgas. These properties were seemed to be based on the difference of the sources and the stabilities of each pollutants in the air. It was found that in order to observe the diffusion of halogenated organics the automatic analyzing system was very effective.
横浜国立大学の論文