石棉纤维计数与重量浓度关系的研究

STUDY ON RELATIONSHIP BETWEEN ASBESTOS FIBRE AND MASS MEASUREMENTS

对北京市制动密封材料厂主要车间的15个监测点进行了石棉纤维计数与重量浓度相关性的研究,结果表明,只有三分之一的点存在相关。但是如果按车间或将全部资料作为一个整体进行两者之间的换算,则发现其存在显著相关(r=0.41,P<0.001)。作者根据测定数据求得回归方程(y=1.2454+0.1730X),将从接尘量与石棉肺和肺癌关系研究中求得的年平均重量浓度换算为计数浓度。

A study on relationship between fibre counting and mass measurement in Beijing brake sealing material factory (previous Beijing asbestos products factory) was investigated.Measurements at 15 selected monitoring places was conducted. The attemp to establish conversion factor from mass measurement to fibre counts or vice versa was made. Only in one third of the 15 places the relationship existed. But if workshop was taken as a unit or all measurement data for the factory were taken, then the relationship between fibre and mass measurements was significant (P<0.001) . The regression equation of convertion from mass to fibre counts was obtained. Using this equation the mass data in the study of relationship between asbestos exposure and incidence of asbestosis and lung cancer were converted into fibre counts.