新たな概念に基づいたイオン性物質の表面吸着捕集手法の提案:内空間におけるイオン性物質の電場条件の相違による表面吸着　その2

摘要

イオンに関する研究は比較的古く、雷現象を解明するための大気rnイオンの研究に始まり、現在では、動物や植物に及ぼす大気イオrnンの影響など、農学その他の分野においても範囲広く研究されていrnる。また、空気を電離して発生させたイオンは、エアロゾル研究rnや工場の静電気対策等さまざまな場面で利用されている。%The purpose of this study is to investigate whether it is possible to determine the fraction of ionized volatile organic compounds (VOCs) using the non-equilibrium surface adsorption onto an aluminum (Al) witness surface under various electric fields. The new principle was proposed to sample the ionized compounds effectively. As test compounds, low-molecular-weight cyclo-dimethyl-siloxanes(LMCSs) were selected. The authors attempted to sample ionized VOC molecules (especially high molecular weight ones) using the witness plate under an applied electric field. For the first step of this study, exposure experiment was conducted to characterize the surface adsorption onto the witness plate and to determine the suitable exposure time for the non-equilibrium surface adsorption. For the main experiment to investigate the possibility of the ionized VOC sampling, the chamber experiments were conducted under a voltage with different polarities to the witness plate and the exposure of the witness plate to test VOC vapor including ionized species generated by a corona-discharge ionizer. This obtained results showed that there were significant differences in the adsorbed amount of test VOCs between the inverse polarity, same polarity and the neutral. Consequently, these results demonstrated that the possibility to determine the ionized fraction of high-molecular-weight VOCs in indoor environment where the ionizer operates.