[The relationship between environmental concentration and exposure concentration in the airborne dust of workplace]

The authors studied the relationship between environmental concentration and exposure concentration in the airborne dust of workplaces, using instantaneous fixed points sampling and personal wear sampling. The results showed that there was a correlation between two kinds of concentrations in the automatic and man-made packing workplaces (r = 0.9914, 0.9977). A relationship between them in the unsteady workplace was found after analysed by one-accumulated generating operation (1-AGO) (r = 0.9945). The samples of environmental and exposure concentrations could be thought from the same normal distribution, that is, the bivariable random sampling in the normal distribution population. Moreover, the exposure concentration could be estimated by environmental one after 1-AGO in the unsteady workplace of airborne dust.