Figure 3From: Physico-chemical characterization of African urban aerosols (Bamako in Mali and Dakar in Senegal) and their toxic effects in human bronchial epithelial cells: description of a worrying situation Relative mass distribution of polar organic compounds for bulk aerosol of Bamako and Dakar samples. The relative mass distribution of each sample was calculated for the bulk aerosol. The quantity of polar compounds in the air is indicated in ng.m-3.Back to article page