Myojo Toshihiko
Department of Work Environment Evaluation, National Institute of Industrial Health, Nagao 6-21-1, Tama, Kawasaki 214-8585, Japan.
Sangyo Eiseigaku Zasshi. 2005 Nov;47(6):239-45. doi: 10.1539/sangyoeisei.47.239.
The relationship between dust size and penetration for a static horizontal elutriator (Sibata C-30) was measured in calm air. The elutriator as a low-volume air sampler is widely used as a dust size classifier in work environment measurements. The actual penetrations were compared with the theoretical models of the sampler and with sampling convention for respirable dust in work environment measurement. The sampling convention was recently introduced into the Japanese standard for work environment measurement and is based on the ISO 7708 respirable dust convention. The bias of sampled masses from the respirable dust was calculated for two flow rates of the sampler, i.e., 50% cut sizes of 4 microm and 5 microm, from measured penetration curves. The bias of the sampler was overestimated in the 5 microm, 50% cut condition and underestimated in the 4 microm, 50% cut condition for most workplace sampling situations.
在静止空气中测量了静态卧式淘析器（柴田C - 30）的粉尘粒径与穿透率之间的关系。该淘析器作为一种小流量空气采样器，在工作环境测量中被广泛用作粉尘粒径分级器。将实际穿透率与采样器的理论模型以及工作环境测量中可吸入粉尘的采样规范进行了比较。该采样规范最近被引入日本工作环境测量标准，并且基于ISO 7708可吸入粉尘规范。根据测量的穿透曲线，针对采样器的两种流速（即50%切割粒径为4微米和5微米）计算了采样质量与可吸入粉尘之间的偏差。在大多数工作场所采样情况下，采样器的偏差在5微米、50%切割条件下被高估，而在4微米、50%切割条件下被低估。
