@article{oai:nagasaki-u.repo.nii.ac.jp:00000512,
 author = {Takao, Yuji and Atarashi, Takumi and Kubo, Takashi and Nagae, Masaki and Nakayama, Tomoki},
 issue = {4},
 journal = {Asian Journal of Atmospheric Environment},
 month = {Dec},
 note = {Ambient aerosol particles at forest and suburban sites in western Japan were analyzed for imidazole compounds, such as 4 (5)-Methylimidazole (4-MI), 1-ethylimidazole (1-EI), 2-ethylimidazole (2-EI), and imidazole-2-carboxaldehyde (IC). The aerosols were collected on quartz fiber filters and extracted by the solid phase extraction method. The extract was analyzed by HPLC/Q-TOF-MS using an ion-pairing agent. The concentration of 4-MI in winter was higher than those in summer at the forest site; its concentration was highest among the analyzed imidazoles. The concentration of 4-MI in the suburban site was several times higher than the forest site. Anthropogenic activities, such as vehicle emissions, are considered to be the major source of 4-MI in this region., Asian Journal of Atmospheric Environment, 13(4), pp.259-265; 2020},
 pages = {259--265},
 title = {Quantification of Imidazole Compounds in Ambient Aerosols at Suburban and Forest Sites in Western Japan},
 volume = {13},
 year = {2019}
}