The Application of Proton Transfer Reaction-Mass Spectrometry (PTR-MS) on Investigating Roadside Volatile Organic Compounds in Hong Kong

摘要

Hong Kong is a densely populated city with heavy traffic volume. A large number of volatile organic compounds (VOCs), which are the precursors of tropospheric ozone and secondary organic aerosols (SOAs), are emitted from traffic-related sources. Special attention has been paid on the characteristics of roadside VOCs and their impacts on the local air quality of Hong Kong during the past decades. In this study, proton transfer reaction-mass spectrometry (PTR-MS), an advanced technique with high-temporal resolution and low detection limit, is firstly applied to the simultaneous real-time monitoring of oxygenated volatile organic compound (OVOCs ) and VOCs at a roadside station in Hong Kong.