CS_2作业工人接触水平的时间加权平均浓度

Study of time weighted average concentration of exposure level in carbon disulfide exposed workers

目的 进行二硫化碳作业工人接触水平的时间加权平均浓度的研究 ,探讨它们的代表性 ,为进一步制订卫生标准提供依据。方法 采用国际通用的方法和仪器 ,分别用固定点采样法测定了车间空气中的二硫化碳浓度 ,个体采样法测定了作业工人 8h的实际暴露水平及其 8h工作地点分布的调查 ,计算出两者各自的TWA ,并进行了比较。结果 粘胶作业工人工作的流动性较大 ,仅有75 %的工作时间停留在车间内 ,分别有 16 .3 %和 8.3%的工作时间分布在车间内休息室和车间外面的环境。结论 固定点采样法和工人个体采样技术所获得的TWA值分别为 14.87mg/m3 和 2 2 .14mg/m3。MAC并不能反映流动性较大的工种工人的实际接触水平。

Objective To study the time weighted average concentration(TWA) of exposure level of carbon disulfide and its expression on dose-effect relationship,so as to provide basis for making hygiene standard. Methods With international standardized methods,the assessment of air carbon disulfide concentrations at the workplace by fixed spot sampling,and 8 h actual exposure levels of the workers by personal sampling techniques were performed,and the working hour distribution was also investigated.TWA were calculated.All of the data was input into the Foxpro database,and was analyzed by Epi info(6.04) and SPSS. Results Working hour distribution of the exposed workers showed:only 75% of the working hours were stayed inside the worksites,other 16.3% and 8.3% of the working hours in the rest room and living room outside the workplace respectively. Conclusion TWA obtained from fixed spot sampling and personal sampling techniques were 14.87 mg/m 3 and 22.14 mg/m 3 respectively.MAC could not express the actual exposure level of workers with varying working hours.