教育課程で使用される化学物質のリスク評価法 : 揮発性化合物の快適性侵害に関する事例研究

概要

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Most of chemicals have acute or chronic toxicity to people or other living things. Risk assessment of chemicals is a basic demand to build up environmental management systems even in educational courses of university where many chemicals are used in experimental subjects of chemistry. Then, authors conducted a case study on exposure and environmental assessment of volatile compounds used in the educational experiment on chemistry. Since amounts of reagents used were small, endpoint of this study was set on infringement of comfort by odor of ammonia according to its volatile property and relatively higher volume of use. A personal diffusion sampler was introduced to determine exposure concentrations of instructors and students during the experiment. The highest concentration was found in the sampler attached to one student who used ammonia solution and resulted in 1.4 ppm which equaled to odor threshold of ammonia. This suggests more air ventilation should be needed to avoid uncomfortable odor. Based on measurements of indoor concentration of ammonia in the class, we estimated atmospheric concentration of ammonia at the edge of the campus using an air diffusion model. The estimated highest concentration was 1.0 x 10^<-3> ppm and much less than allowable level by law and odor threshold. This means that residents living near campus have no possibility to be annoyed from ammonia.
東海大学の論文
2003-03-30