Application of Chemical Ionization Mass Spectrometry in Airborne SO2 Observation on Hanseo Beechcraft 1900 D

Abstract

As the observational constraints of SO2 become a limiting factor for emission inventory and regional and global transport model validations, we present an airborne SO2 observational suite integrated on Beechcraft 1900D(B1900D) operated by Hanseo University. A chemical ionization mass spectrometry (QMS) technique using SF6-ion chemistry is used to take advantage of fast response (< 1 Hz) and the low limit of detection (30 ppt). In this study, we describe the performance of the CIMS system on B1900D along with descriptions on the modified airborne platform. Furthermore, exemplary observational results around point sources such as a steel production facility and a petrochemical industrial facility in the Taeahn Peninsula in South Korea. In addition, an observational result over the Yellow Sea is presented to demonstrate the ability of the instrumentation to capture pollution transport from the continent. Overall, the performance of the airborne CIMS system for SO2 is well demonstrated for future air quality studies.