冲击式二级采样对呼吸粉尘与总粉尘浓度比值的影响

Effect of Impactor Sampling on the Ratio of Respirable Dust Concentration to Total Dust Concentration

为了验证冲击式二级粉尘采样对呼吸性粉尘与总粉尘浓度比值的影响，作者采用瞬时定点采样方法测定作业场所空气中呼吸性粉尘浓度与总粉尘浓度。结果表明，在采样体积相同的条件下，呼吸性粉尘的比值与总粉尘浓度间具有较好的从属共变关系（ｒ＞０．８）。

The aim of this study was to verify the change of the ratio of Respirable Dust Concentration (RDC)to Total Dust Concentration(TDC)taken by two stage impactor sampling.The results showed that there was a correlation between the ratio of RDC/TDC and TDC(correlation coefficient was 0 8576,0 8689,0 8736 and 0 9674,respectively)under the condition of identical sampling volume,and the ratio increases along with the elevated TDC.