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尘肺的发生、发展与吸入肺内的粉尘量关系密切,这点已为人们所公认。国外近几年来除了规定空气中粉尘浓度标准外,还规定了各种不同浓度下最大累计工作班或工作年的标准。由于不能直接测定吸入肺内的粉尘量,所以真实反映粉尘作业工人的工班平均接触浓度,是正确评价粉尘对人体危害程度的一个重要的客观指标。长期以来用滤膜定点采样所得浓度,作为粉尘对人体危害的评价指标,是不符合工人实际接尘情况的。为了进一步了解采样方法与工人实际接触浓度的关系,我们用三种采样方法进行测定并作了比较。
The occurrence and development of pneumoconiosis are closely related to the amount of dust inhaled in the lungs, which has been well recognized by people. In recent years, foreign countries in addition to the provisions of dust concentration standards in the air, but also provides a variety of different concentrations of maximum cumulative working class or working year standards. Since the amount of dust inhaled into the lungs can not be measured directly, the average contact concentration of workers in dust-handling jobs is truly reflected. This is an important objective indicator for correctly evaluating the degree of dust damage to the human body. Long-term use of filter membrane fixed-point sampling of the resulting concentration, as the dust on the human body hazard evaluation index is not in line with the actual situation of workers dust. In order to further understand the sampling method and the actual contact concentration of workers, we use three sampling methods were measured and compared.