空气质量 与健康相关的采样的粒径定义

[中文适用范围]： 定义颗粒尺寸分数的采样约定，用于评估工作场所和周围环境中空气颗粒可能对健康的影响。 定义了可吸入、胸部和可呼吸部分的惯例；胸腔外和气管支气管惯例可以根据定义的惯例计算。 这些约定不应与其他术语定义的极限值结合使用，例如根据其长度和直径定义的纤维极限值。 [外文原描述]： Defines sampling conventions for particle size fractions for use in assessing possible health effects of airborne particles in the workplace and ambient environment. Defines conventions for the inhalable, thoracic and respirable fractions; extrathoracic and tracheobronchial conventions may be calculated from the defined conventions. The conventions should not be used in association with limit values defined in other terms, for example for limit values of fibres defined in terms of their length and diameter.