Development of quantitative analysis for polycyclic aromatic hydrocarbons in combustion emission using fluorescence and scattering signal from particles

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K05152
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 34030:Green sustainable chemistry and environmental chemistry-related
• Research Institution: Tokyo Metropolitan University
• Principal Investigator: Misawa Kentaro 東京都立大学, 理学研究科, 助教 (10431991)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: エアロゾル / 蛍光 / 多環芳香族炭化水素

Outline of Final Research Achievements

A new apparatus that can detect scattering light and fluorescence from individual particles simultaneously was developed. A particle size dependence on the ratio of fluorescence to scattering signal from individual particles was found by measuring various sizes of fluorescent polystyrene latex particles. Particles consisted of fluorescent molecules including polycyclic aromatic hydrocarbons were detected and analyzed by the newly developed apparatus. To analyze the fluorescence intensities and wavelengths of the particles consisted of polycyclic aromatic hydrocarbons more precisely, implementation of a real-time and quantitative analysis of polycyclic aromatic hydrocarbons in atmospheric aerosols would be expected.

Free Research Field

分析化学

Academic Significance and Societal Importance of the Research Achievements

燃焼排出粒子に含まれる多環芳香族炭化水素は、不完全燃焼により生成するすすの主成分であり、健康影響や気候影響が示唆されている。しかし、大気観測による定量精度が低く大気への排出量が正確に見積もられていない。本研究で開発された手法を用いて粒子中の多環芳香族炭化水素の量を推定することが可能になると考えられる。今後さらに各化合物の蛍光強度の粒径依存性や蛍光波長の詳細な解析を行うことで、大気エアロゾル粒子中の多環芳香族炭化水素のリアルタイム定量分析への適用が期待できる。