Four- and Five-Carbon Dicarboxylic Acids Present in Secondary Organic Aerosol Produced from Anthropogenic and Biogenic Volatile Organic Compounds

Atmosphere

Akihiro Iijima¹  Kimiyo Kumagai²  Fumikazu Ikemori³  Sathiyamurthi Ramasamy⁴  Akihiro Fushimi⁴  Kei Sato⁴  Yu Morino⁴ 

[1] Faculty of Regional Policy, Takasaki City University of Economics, Takasaki 370-0801, Japan;Gunma Prefectural Institute of Public Health and Environmental Sciences, Maebashi 371-0052, Japan;Nagoya City Institute for Environmental Sciences, Nagoya 457-0841, Japan;National Institute for Environmental Studies, Tsukuba 305-8506, Japan;

关键词: volatile organic compound;    secondary organic aerosol;    aerosol tracer;    environmental chamber;    chemical mechanism;    aerosol source apportionment;   

DOI  :  10.3390/atmos12121703

来源: DOAJ

【 摘 要 】

To better understand precursors of dicarboxylic acids in ambient secondary organic aerosol (SOA), we studied C4–C9 dicarboxylic acids present in SOA formed from the oxidation of toluene, naphthalene, α-pinene, and isoprene. C4–C9 dicarboxylic acids present in SOA were analyzed by offline derivatization gas chromatography–mass spectrometry. We revealed that C4 dicarboxylic acids including succinic acid, maleic acid, fumaric acid, malic acid, DL-tartaric acid, and meso-tartaric acid are produced by the photooxidation of toluene. Since meso-tartaric acid barely occurs in nature, it is a potential aerosol tracer of photochemical reaction products. In SOA particles from toluene, we also detected a compound and its isomer with similar mass spectra to methyltartaric acid standard; the compound and the isomer are tentatively identified as 2,3-dihydroxypentanedioic acid isomers. The ratio of detected C4–C5 dicarboxylic acids to total toluene SOA mass had no significant dependence on the initial VOC/NO_x condition. Trace levels of maleic acid and fumaric acid were detected during the photooxidation of naphthalene. Malic acid was produced from the oxidation of α-pinene and isoprene. A trace amount of succinic acid was detected in the SOA produced from the oxidation of isoprene.

【 授权许可】

Unknown