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目的比较化学物职业接触限值(OEL)与环境空气污染物浓度限值,探讨职业接触定量化的界定。方法搜集中国、美国、欧洲化学物OEL与环境空气污染物浓度限值,并进行统计分析。结果共收集到30种化学物的45对OEL和环境浓度限值。OEL和环境空气污染物浓度限值几何均数分别为2.09 mg/m3和0.01 mg/m3,OEL是环境空气污染物浓度限值的200.17倍。2限值回归方程为lgy=1.182 lgx-2.36[决定系数(R2)=0.567]。2限值概率密度函数曲线交点浓度值为0.092 9 mg/m3,是OEL的1/22.45,环境空气污染物浓度限值8.93倍。当浓度取1/20 OEL时,该浓度低于对应的环境空气污染物浓度限值比例为20%。结论当工作场所化学物浓度高于OEL 1/10时,可定义为职业接触。
Objective To compare the limits of Occupational Exposure (OEL) of chemical substances with the concentration limits of ambient air pollutants and to explore the definition of quantitative occupational exposure. Methods The concentrations of OEL and ambient air pollutants in China, the United States and Europe were collected and statistically analyzed. Results A total of 45 pairs of OELs and environmental concentration limits were collected for 30 chemicals. The geometrical mean values of OEL and ambient air pollutant concentration limits are 2.09 mg / m3 and 0.01 mg / m3, respectively. The OEL is 200.17 times the limit value of ambient air pollutant concentration. 2 limit regression equation is lgy = 1.182 lgx-2.36 [coefficient of determination (R2) = 0.567]. 2 Limit value Probability density function curve intersection point concentration value is 0.092 9 mg / m3, which is 1 / 22.45 of OEL, and the limit value of ambient air pollutant concentration is 8.93 times. When the concentration is 1/20 OEL, the concentration is lower than the corresponding limit of 20% of the ambient air pollutant concentration. Conclusions Occupational exposures can be defined when workplace chemical concentrations are higher than OEL 1/10.