亚麻工人中慢性支气管炎患者的肺部Ｘ线表现类似矽肺和霉菌孢子引起的肺部Ｘ线表现 ,故怀疑亚麻工人中慢性支气管炎患者的肺部Ｘ线表现可能是有机粉尘和无机粉尘共同作用的结果[1] 。因此 ,我们首先用焦磷酸法对亚麻尘中游离二氧化硅含量进行了测定。但此法影响因素较多 ,对实 Pulmonary X-ray findings in patients with chronic bronchitis in flax workers are similar to pulmonary X-ray manifestations caused by silicosis and mold spores, so it is suspected that lung X-ray findings in flax workers may be due to the interaction of organic and inorganic dusts The result [1]. Therefore, we first determine the content of free silica in linen dust by pyrophosphate method. However, this law has more influential factors