Aerosol mass spectrometry of neutral species based on a tunable vacuum ultraviolet free electron laser. Issue 27 (30th June 2022)

• Record Type: Journal Article
• Authors: Zang, Xiangyu; Zhang, Zhaoyan; Jiang, Shukang; Zhao, Yingqi; Wang, Tiantong; Wang, Chong; Li, Gang; Xie, Hua; Yang, Jiayue; Wu, Guorong; Zhang, Weiqing; Shu, Jinian; Fan, Hongjun; Yang, Xueming; Jiang, Ling
• Is Part Of: Physical chemistry chemical physics. Volume 24:Issue 27(2022)
• Page Start: 16484
• Page End: 16492
• Publication Date: 2022-06-30
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/d2cp01733d
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : A vacuum ultraviolet free electron laser photoionization aerosol mass spectrometer was developed and applied to the α-pinene ozonolysis with the observation of two new compounds. Abstract : A vacuum ultraviolet free electron laser (VUV-FEL) photoionization aerosol mass spectrometer (AMS) has been developed for online measurement of neutral compounds in laboratory environments. The aerosol apparatus is mainly composed of a smog chamber and a reflectron time-of-flight mass spectrometer (TOF-MS). The indoor smog chamber had a 2 m 3 fluorinated ethylene propylene film reactor placed in a temperature- and humidity-controlled room, which was used to generate the aerosols. The aerosols were sampled via an inlet system consisting of a 100 μm orifice nozzle and aerodynamic lenses. The application of this VUV-FEL AMS to the α-pinene ozonolysis under different concentrations reveals two new compounds, for which the formation mechanisms are proposed. The present findings contribute to the mechanistic understanding of the α-pinene ozonolysis in the neighborhood of emission origins of α-pinene. The VUV-FEL AMS method has the potential for chemical analysis of neutral aerosol species during the new particle formation processes.