Evolution of Industry-Related Volatile Organic Compound Levels Affected By Covid-19 Lockdown in Belgrade

In this study, we have evaluated the impacts of emergency state and curfew period on the industry-related volatile organic compound concentrations in Belgrade, Serbia. Pollutant concentrations were registered during the three-month period by using Standard Proton Transfer Reaction Quadrupole Mass Spectrometer (PTR-MS) and data analyses included correlation analysis with hierarchical clustering, probability density functions, and bivariate polar plots. As shown, all compounds, except those registered at protonated mass m/z 121, exhibited a significant drop in concentrations only a week after curfew was introduced. The behavior of analyzed compounds suggests that the VOC concentrations are more affected by industrial than traffic emissions.