| In this paper, the detection limit, precision, accuracy and reliability of the method were studied for determining the concentration of particulate matter in waste gas from stationary source by outside flue filtration and β ray through laboratory simulation and field detection. The results showed that the method detection limit was 0.1 mg/m3. The RSDs of 6 measurements of particulate matter standard sample with low, medium and high mass concentration were 4.6%, 2.7% and 1.6%, respectively, and the relative errors were（2.9±9.5）%, （0.8±5.5）% and （1.5±3.2）%, respectively. The higher the mass concentration of particulate matter measured by standard sample, the better the precision and accuracy. Comparing this method with gravimetric method, it was found that the change trend of the measurements by the two methods was consistent. The higher the particle concentration, the smaller the relative deviation and the higher the consistency of the two methods. |
