This paper presents the results of the PM2.5 and PM10 mass concentration measurements in an urban air and results obtained from the additional chemical analysis concerning carbon and sulfur content of the collected dust samples. Dust samples were collected at the measuring point located on the roof of five-storey building at the AGH University of Science and Technology in Krakow, Poland (the center of the urban area of the city). In the scope of this study the relations between the carbon and sulfur content within the collected dust samples were determined in the function of the dust fraction content and selected meteorological factors. As a result of the study the hypothesis identifying the main sources of dust emissions determining the air quality in Krakow were faced.

Polish title: Content of carbon and sulfur in PM2.5 and PM10 in ambient air of the centre of Krakow.