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工业粉尘中游离二氧化硅(SiO_2)是矽肺病的主要病因,其含量的多寡,决定了粉尘对工人健康危害的大小和车间空气中最高容许浓度的高低。在劳动卫生与职业病的教学、科研、实际工作和环境保护工作中,测定粉尘中SiO_2含量是经常性的工作。目前国内常用化学分析法,其中广泛使用的是我国卫生部推荐的焦磷酸重量法。随着仪器分析的发展,于70年代初期,国外开始采用x线衍射法进行测定。这个自动、快
Industrial dust in the free silicon dioxide (SiO 2) is the main cause of silicosis, the amount of its content determines the size of the dust on the health hazards of workers and workshop air maximum allowable concentration level. In the teaching of labor hygiene and occupational diseases, scientific research, practical work and environmental protection, determination of the content of SiO 2 in dust is a regular work. Currently commonly used chemical analysis, which is widely used by China’s Ministry of Health recommended pyrophosphate gravimetric method. With the development of instrumental analysis, in the early 1970s, foreign countries began to use x-ray diffraction method for the determination. This is automatic, fast