Research on Aerosol Dilution Method in the Calibration Process of Laser Paticle Counter
HUANG Zhi-huang1,LIU Jun-jie2,GUO Kai3
1. Fujian Metrology Institute, Fuzhou, Fujian 350003, China
2. National Institute of Metrology, Beijing 100029, China
3. China University of Petroleum, Beijing 102249, China
Abstract In order to solve the traceability problem that the laser particle counter can not be implemented by condensation nucleus counter based on direct comparing method, according to the principle of Bernoulli gas flow and the calculation method of aerosol dilution ratio, the dilution process of aerosol is analysed. As the increase of added gas flow,it has a problem that the pressure inside the dilution chamber is not constant. A new method of aerosol dilution to meet the traceability issues of laser particle counter is proposed. The results show that the new method could settle the interference matter of aerosol outlet flow caused by make-up gas, and keep a better uniformity among 0~90 times particles dilution ratio of different diameter in high concentration of aerosol. The max relative error of the measured data and the theoretical calculation is no more than 4.4%.
HUANG Zhi-huang,LIU Jun-jie,GUO Kai. Research on Aerosol Dilution Method in the Calibration Process of Laser Paticle Counter[J]. Acta Metrologica Sinica, 2016, 37(4): 448-451.
［1］Kulkarni P. Aerosol Measurement:Principles, Techniques, and Applications［M］.New York:John Wiley and Sons Inc, 2001.
［2］Owen M C. An Aerosol Number Concentration Primary Standard［C］//2006 NCSL International Workshop and Symposium, Nashville, TN, USA, 2006.
［3］刘俊杰,张文阁,胡向军.气溶胶静电计的校准研究［C］//第九届全国颗粒测试学术会议暨现代颗粒测试技术发展与应用研讨会,贵阳,2013.
［4］ISO 21501-4—2007, Determination of particle size distribution—Single particle light interaction methods-Parts 4: Light scattering airborne particle counter for clean spaces［S］.
［5］Fletcher R A, Mulholland G W, Winchester M R, et al. Calibration of a Condensation Particle Counter Using a NIST Traceable Method［J］. Aerosol Science and Technology, 2009, 43(5):425-441.
［6］JJF 1190—2008, 尘埃粒子计数器校准规范［S］.
［7］Yoon Y J, Cheevers S, Jennings S G, et al. Performance of a venturi dilution chamber for sampling 3～20 nm particles ［J］. Journal of Aerosol Science, 2005,36(4):535-540.
［8］Collins A M. Ultrafine particle loss in aerosol diluters［D］. Minneapolis: University of Minnesota, 2010.
2016, Vol. 37 
