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采用瞬时定点与个体采样测定粉尘作业场所环境与接触浓度，对二者间的关系进行研究。结果表明，在人工包装、自动包装作业场所环境与接触浓度的原始序列间存在较好的共变从属关系（ｒ分别为０．９４１４，０．９９７７）；在非稳定的接包作业场所两浓度一次累加生成后，具有较好的共变从属关系（ｒ＝０．９９４５）。因此，在较稳定的粉尘作业场所环境与接触浓度认为是来自同一总体，即正态双变量随机抽样。非稳定作业场所一次累加生成后，可以考虑用环境浓度估计接触浓度。
The instantaneous fixed-point and individual samples were used to determine the environment and exposure concentration of dusty workplace, and the relationship between them was studied. The results show that there is a good covariation relationship between the original sequence of the ambient and contact concentration in the manual packaging and the automatic packaging (r = 0.9414 and 0.9977, respectively); in the unsteady package work place, the two concentrations After one accumulation, there is a good covariation relationship (r = 0.9945). Therefore, in more stable dust workplace environment and exposure concentrations are considered to be from the same population, ie, normal bivariate random sampling. After a cumulative non-stable workplace generated, you can consider the estimated concentration of environmental exposure concentration.