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
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.
［1］陈仲辉,张文阁,黄星亮,等.PM2.5切割器切割特性研究［J］.中国计量,2014,(8):82-85.
［2］US EPA. 40 CFR Parts 53 and 58, Revised Requirements for Designation of Reference and Equivalent Methods for PM2.5 and Ambient Air Quality Surveillance for Particulate Matter ［S］.
［3］HJ 618—2011 环境空气PM10和PM2.5的测定 重量法［S］.
［4］JIS Z8851—2008 室温下PM2.5的取样器［S］.
［5］GB/T 31159—2014 大气气溶胶观测术语［S］.
［6］张瑞军,高思田,李伟,等.计量型扫描电子显微镜测控系统研究［J］.计量学报,2016,37(5):457-461.
Zhang R J, Gao S T, Li W,et al. Study on the Measuring and Control System of Metrological Scanning Electron Microscope［J］.Acta Metrologica Sinica,2016,37(5):457-461.
［7］Nicolet A, Meli F. Spherical polystyrene particle deformation measured with the AFM［J］. Measurement Science & Technology,2017,28(3):034003.
［8］张文阁,高思田,宋小平,等.细颗粒物PM2.5浓度测量及计量技术［J］.中国粉体技术,2013,19(6):69-72.
Zhang W G, Gao S T, Song X P,et al.Concentration Measurement and Metrical Technology of Fine Particulate Matter PM2.5［J］.China Powder Science and Technology,2013,19(6):69-72.
［9］李琪,李伟,施玉书,等. 248 nm紫外显微镜微纳线宽校准方法的研究［J］.计量学报,2015,36 (1): 6-9.
Li Q, Li W, Shi Y S,et al. The Research of Nanometer Line width Calibration Method Used by 248nm Ultraviolet Microscope［J］.Acta Metrologica Sinica,2015,36 (1): 6-9.
［10］Kato H, Ouchi N, Nakamura A. Simultaneous Measurement of size and density of spherical particles using two-dimensional particle tracking analysis method［J］.Powder Techmology,2017,315:68-72.
［11］Jung K Y, Park B C,Song W Y,et al. Measurement of 100 nm polystyrene sphere by transmission electron microscope［J］. Powder Technology, 2002, 126:255~265.
［12］余学锋,于杰,王柯,等. 基于证据理论的测量不确定度评定与分析［J］.计量学报,2017,38(2):252-256.
Yu X F,Yu J,Wang K,et al. Evaluating and Analyzing Measurement Uncertainty Based on the Theory of Evidence［J］.Acta Metrologica Sinica,2017,38(2):252-256.
2019, Vol. 40 
