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棉尘作业现场浓度测定,对卫生学评价、人群健康监护、棉尘症发病规律探讨、诊断,防尘设施的效果评价等,是必不可少的重要手段。现就棉尘测定中滤膜要求的有关问题进行讨论。一、棉尘类型棉尘类型按其空气动力学直径可分为三类:①粒径大于15μm,能被鼻腔所阻挡,对人体危害较小,②粒径0.1～15μm,能从上呼吸道进入肺泡,并存留在肺内,对人体危害极大,称“吸入性粉尘”,③粒
Cotton dust on-site concentration measurement, evaluation of hygiene, health monitoring of the population, the incidence of cotton dust disease, diagnosis, the effectiveness of dust-proof facilities evaluation, is an essential means. The cotton dust determination of the membrane requirements of the relevant issues are discussed. Cotton dust type Cotton dust type according to its aerodynamic diameter can be divided into three categories: ① particle size greater than 15μm, can be blocked by the nasal cavity, less harmful to humans, ② particle size 0.1 ~ 15μm, from the upper respiratory tract into Alveoli, coexist in the lungs, the great harm to the human body, called “inhalation of dust”, ③ tablets