Modification of Rapid Evaluation Method for PM2.5 Cutter by Internal Calibration Method
LIU Jia-qi1,ZHANG Guo-cheng1,TIAN Ying1,WU Dan1,SHEN Shang-yi1,JING Wen-jie1,QU Xiao-hu2,ZHANG Yan-wei2
1. Beijing Institute of Metrology/National Quality Supervision and Inspection Center for Ecological and Environmental Products, Beijing 100029, China
2. Hebei Advanced Environmental Protection Industry Innovation Center Co. Ltd., Shijiazhuang, Hebei 050035, China
Abstract：The rapid detection of PM2.5 cutter by using polydisperse particles can greatly improve the detection efficiency. It was found that the particle size measurement results of aerodynamics particle size spectrometer are occasionally offset (small). In order to overcome the influence of drift, the reference material of monodisperse microspheres was proposed to be added into the polydisperse particles. The drift of the capture efficiency curve can be corrected by the standard value of the particle size. This method was used to evaluate imported and domestic PM2.5 cutters, and the evaluation results were compared with the evaluation results of eight kinds of particle size monodisperse microspheres. This method not only made use of the high efficiency of aerodynamic particle size spectrometer method in PM2.5 cutter evaluation, but also effectively avoided the influence caused by offset, which has the role of improving the measurement reliability in the application of aerodynamic particle size spectrometer.
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2023, Vol. 44 
