Chemical structures of organic aerosol and their links with sources and light-absorbing properties

2022 Fiscal Year Annual Research Report

• Project/Area Number: 21F20397
• Research Institution: Nagoya University
• Principal Investigator: 持田 陸宏 名古屋大学, 宇宙地球環境研究所, 教授 (10333642)
• Co-Investigator(Kenkyū-buntansha): CHANG YUNHUA 名古屋大学, 宇宙地球環境研究所, 外国人特別研究員
• Project Period (FY): 2021-04-28 – 2023-03-31
• Keywords: organic aerosol / mass spectrometry

Outline of Annual Research Achievements

The mass spectrometric analysis for water-soluble and water-insoluble components extracted from atmospheric aerosol samples collected during COALA-2020 campaign in New South Wales, Australia, in 2020 (cut-off diameter: 0.95 micrometer) was in part performed under this research project by the use of an high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS). In this analysis, the solutions of water-soluble and water-insoluble components from the aerosol samples were nebulized using a home-made nebulizer with compressed cylinder air. The generated aerosols were passed through diffusion scrubbers to remove solvent vapors, which was followed by the exchange of the carrier gas to argon in gas exchange device. The sample aerosol particles in the argon flow were transferred to the HR-ToF-AMS for the analysis using electron ionization mass spectrometry. This mass spectrometric analysis, along with that was performed after the experiments under this project, is expected to contribute to the understanding of the contrasting roles of biomass burning organic aerosol and biogenic secondary organic aerosol: both of them are of biomass origin but they are from different emission pathways.

Research Progress Status

令和4年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和4年度が最終年度であるため、記入しない。

Research Products

• [Presentation] COALA-2020観測においてオーストラリアで採取した大気エアロゾル試料の化学構造・光吸収特性の分析 (2022)
  • Author(s): 持田陸宏, Ruichen Zhou, Sonia Afsana, 大畑祥, 横山容子, 五十嵐元美, Dhananjay K. Deshmukh, Bhagawati Kunwar, 河村公隆, Quang Dang, Clare Palton-Walsh
  • Organizer: 第27回大気化学討論会