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石棉除能引起人类石棉肺外,已被公认为确定的致癌物质,它使接触者肺癌发病率大大提高,并可引起间皮瘤,因而引起广泛的关切。测定其在空气中的含量是必要的监测手段。我国沿用重量法测石棉尘,但此法不能区分采得的粉尘样品中有多少是石棉尘,因而不是理想方法。采用石棉纤维计数测定法,可对有致病意义的呼吸性石棉纤维进行计数,同时排除了其他杂质,在衡量石棉对健康的危害性上较为真实。目前国外所用石棉纤维计数测定的常规
Asbestos in addition to causing asbestosis in human lungs, has been recognized as a confirmed carcinogen, which greatly increased the incidence of lung cancer in contact with, and can cause mesothelioma, which has caused widespread concern. Determination of its content in the air is necessary monitoring means. China follows the gravimetric method to measure asbestos dust, but this method can not distinguish the number of dust samples taken as asbestos dust, so it is not an ideal method. Using asbestos fiber count assay, can have pathogenic significance of respiratory asbestos fiber count, while excluding other impurities, asbestos in the measurement of the health hazards on the more real. Abroad currently used asbestos fiber count determination of conventional