The elemental composition data obtained from XRF analysis are used to identify potential sources of air pollution and conduct pollution source apportionment studies . By comparing the elemental signatures of PM samples with those of known emission sources, such as industrial emissions or vehicle exhaust, researchers can gain insights into the contribution of different sources to the overall pollution. This information is crucial for developing effective pollution control strategies and targeted interventions. In the research conducted by Yeonjin Kim et al. , the objective was to determine the chemical composition of PM through XRF analysis. For this purpose, three filter samples were obtained from the living rooms of 8 households, each inhabited by individuals with asthma to assess the concentrations of heavy metals in PM2.5.