Single particle analysis of secondary organic aerosols formed from 1,4-cyclohexadiene ozonolysis using a laser-ionization single-particle aerosol mass spectrometer

Masahiro Narukawa, Yutaka Matsumi*, Jun Matsumoto, Kenshi Takahashi, Akihiro Yabushita, Kei Sato, Takashi Imamura

*この研究の対応する著者

研究成果: Article査読

4 被引用数 (Scopus)

抄録

Real-time analysis of secondary organic aerosol (SOA) particles formed from 1,4-cyclohexadiene (CHD) ozonolysis in a smog chamber was performed using a laser-ionization single-particle aerosol mass spectrometer (LISPA-MS). The instrument can be used to obtain both the size and chemical compositions of individual aerosol particles with a high time-resolution (≈2 s at the maximum). Both positive- and negative-ion mass spectra can be obtained by changing the voltage polarity of the instrument. The negative-ion spectra of the SOA particles provided important information about the chemical compositions of the SOA particles. In the negative-ion spectra, intense mass peaks were determined to correspond to ions with carboxyl and aldehyde groups. The signal intensities of the intense mass peaks from compounds with carboxyl groups were higher than those from compounds with aldehyde groups as a function of the particle size. The peaks suggest that the SOA particles contain more oxygenated organic compounds as the particle size increases, namely, the chemical compositions of the SOA particles vary as a function of the particle size. We demonstrated that the real-time single-particle analysis of SOA particles by using the LISPA-MS technique can be used to clarify the formation and transformation processes of SOA particles in smog chambers.

本文言語English
ページ(範囲)120-126
ページ数7
ジャーナルBulletin of the Chemical Society of Japan
81
1
DOI
出版ステータスPublished - 2008 12月 1
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)

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