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车间空气中粉尘容许浓度的现场调查,基于剂量～反应原理,目的在于寻找无害作用的剂量,必须注意资料的收集和选择适当的统计处理方法。资料的收集一、调查对象的选择。1.要有一定数量的接尘工人,以满足统计分析的要求。2.接触粉尘的性质要固定,因为容许浓度是对某种性质的粉尘而言。3.工人工种要力求相对固定,有其他粉尘接触史者,应剔除。4.现场浓度的选择,一般以出现一定反应率为好。当目的为验证容许浓度时,宜选择达到或接近容许浓度的现场。5.选择的调查现
Based on the dose-response principle, the aim is to look for a dose that does not have a detrimental effect and must pay attention to the collection of data and the selection of appropriate statistical methods. Data collection First, the survey’s choice. 1. There must be a certain amount of dust pick-up workers to meet the requirements of statistical analysis. 2. The nature of contact dust to be fixed, because the allowable concentration is for some properties of dust. 3 workers should strive to relatively fixed, there are other dust exposure history, should be removed. 4. The choice of site concentration, the general response to a certain rate as well. When the purpose is to verify the allowable concentration, should choose to reach or approach the allowable concentration of the site. 5. Selected survey is now