1. Shaanxi Environmental Monitoring Center Station, Xi’an 710043, China
2. Shaanxi Key Laboratory for Environmental Monitoring and Forewarning of Trace Pollutants, Xi’an 710054, China
3. Guangzhou Hexin Analytical Instrument Company Limited, Guangzhou 510530, China
4. Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China
5. Institute of Mass Spectrometry and Atmospheric Environment, Guangdong Provincial Engineering Research Center for On-line Source Apportionment System of Air Pollution, Jinan University, Guangzhou 510632, China
6. Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Guangzhou 511443, China