Fig. 3From: Characterization of residential household dust from Shanghai by particle size and analysis of organophosphorus flame retardants and metalsSurface elemental composition in Shanghai household dust fractions presented as relative atomic concentration (%). F2: 75–190 µm, F3: 25–75 µm, F4: cyclone 4–25 µm and F5e: 2.22 ± 2.04 µmBack to article page