Sensitivity analysis of volatile organic compounds to PM2.5 concentrations in a representative industrial city of Korea

This study aims to analyze the sensitivity of volatile organic compounds (VOCs) to ambient concentrations of fine particles (PM 2.5 ) in the representative industrial city of Ulsan, Korea. For the calculation of sensitivity coefficients between VOCs and PM 2.5 (SVOCs-PM 2.5 ), PM 2.5 data were obtained from an air quality monitoring station, and their corresponding 6-h average concentrations of VOCs (alkanes, alkenes, aromatics, and total VOCs) were measured at the Yeongnam intensive air monitoring station. The air monitoring period was divided into the warm-hot season (May–October 2020) and the cold season (November 2020–January 2021). The sensitivity coefficients in the low pollution period of PM 2.5 (5