Evaluation of air-samplers for inhalable particles and respirable particles, and development of a new high-volume-air-sampler for respirable particles.

工作环境中颗粒物的健康影响受到关注。因此，不仅要了解颗粒物对人体的健康影响，而且要了解颗粒物的暴露水平，这对于颗粒物的风险评估是非常重要的。可吸入颗粒物或可吸入颗粒物等颗粒物的大小被定义为职业接触限值。本研究以微米级（1 ~ 10 m）颗粒物为采样对象，对工作环境中气溶胶颗粒物的采样仪器进行了评价，并研制了一种新型旋风式大容量采样器，对旋风式采样器的颗粒穿透特性进行了评价。

Health effects of particulate matters in work environments were concerned. It is important to know not only health effect but also exposure level for risk assessment of the particulate matters. Size of particulate matters, such as inhalable particles or respirable particles, was defined for occupational exposure limits. In this study, sampling instruments for aerosol particles in work environment were assessed using micron size test particles (1 – 10 m).Also we developed a new cyclone-based device for high volume air sampler and evaluated the particle penetration characteristics of the cyclone.