Source characterization of volatile organic compounds measured by PTR-ToF-MS in Delhi, India

Ambient measurement campaign took place at two sites during winter 2018 in Delhi, India. The sources of volatile organic compounds were disclosed measured by proton-transfer-reaction time-of-flight mass spectrometers (PTR-ToF-MS). The application of the novel positive matrix factorization receptor model enables the identification of strong anthropogenic sources at night and atmospheric oxidations in the daytime. Besides, a detailed comparison of VOC source composition and chemical transformation processes was provided in the urban and suburban areas.