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| Preparation of National Primary Reference Materials for PM2.5 Monitors |
| ZHANG Wen-ge1,LIU Wei2,XU Xiao1,CHEN Zhong-hui3,LIU Jun-jie1,CHI Shun-xin1,HU Xiang-jun1 |
1.National Institute of Metrology, Beijing 100029, China
2.Qingdao Institute of Measurement Technology, Qingdao,Shandong 266101, China
3.Qingdao Laoshan Institute of Applied Technology, Qingdao, Shandong 266100, China |
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Abstract The preparation method of the national primary reference materials(GBW13642~GBW13649) used in the detection of PM2.5 monitors is introduced. Monodisperse crosslinked polystyrene microspheres with good sphericity were used as candidates of reference materials. The specific values of primary materials were determined by the method which can be traced back to the national standard of length (scanning electron microscopy and image analysis method) and the method of density measurement. The aerodynamic diameter was modeled by the method of calculating the equivalent diameter of classical aerosol dynamics. The experimental results show that the standard materials are most applicable for the detection and calibration of the cutting characteristics of PM2.5 monitors, and can be used as the dust source for the detection and calibration of the PM2.5 monitors.
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Received: 08 May 2017
Published: 07 January 2019
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2019, Vol. 40 
