AMTD Atmospheric Measurement Techniques Discussions AMTD Atmos. Meas. Tech. Discuss. 1867-8610 Göttingen, Germany 10.5194/amt-2017-267 Standard source of atmospheric black carbon aerosol generated from ultrasonic spray of BC suspension Zhu Ruchen 1 Wang Huixiang 1 Wang Xiaoyan 2 Liu Hao 3 College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China China National Environmental Monitoring Center, Beijing 100012, China Yangtze River Water Resources Protection Bureau, Wuhan 430010, China National Natural Science Foundation of China 41475111 30 08 2017 2017 1 12 Copyright: © 2017 Ruchen Zhu et al. 2017 This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/ This article is available from https://amt.copernicus.org/preprints/amt-2017-267/ The full text article is available as a PDF file from https://amt.copernicus.org/preprints/amt-2017-267/amt-2017-267.pdf

Black carbon (BC) aerosol has strong radiative forcing and plays an important role in global climate change and human health. A generator with low levels of BC-air is developed in this study for researchers to calibrate BC monitors. Ultrasonic nozzle is applied to atomize BC suspension to produce quantificational BC-air samples which can be used directly as a standard source of BC. Membrane test conducted by balance is used to check up its feasibility. Results show that the relationship of weight increment of membrane and target concentration of BC-air have very good linearity. This confirms that the ultrasonic spray system is a good source to generate standard concentration of BC-air. The device has good feasibility in the BC concentrations range of 0&ndash;200&thinsp;μg&thinsp;m<sup>&minus;3</sup>. Multi Angle Absorption Photometer (MAAP) is used to detect the concentration of BC-air generated by the ultrasonic spray of suspension. Target concentrations generated by the device accord with the measured data of MAAP.