Measurement Method of Brominated Flame Retardants in Road Dusts and its Application to Environmental Distribution in Nagoya city

A simultaneous determination method for brominated flame retardants (BFRs) of hexabromocyclododecane isomers(HBCDs), tetrabromobisphenol A (TBBPA) and 2,4,6-tribromophenol (TBP) in road dust has developed and applied to the environmental distribution survey in Nagoya city. The recovery rates and relative standard deviations (RSD%) of total HBCDs, TBBPA, TBP were 86% (RSD 2.3%), 107% (RSD 1.3%) and 114% (RSD 4.2%), respectively. The method was applied to the determination of the BFRs in road dusts at 50 area meshes (2.5 km ×2.5 km) covering the entirety of Nagoya city. The concentrations of total HBCDs, TBBPA and TBP in the road dust were respectively 0.11 to 10.6 ng/g with the mode value of 1.2 ng/g or less, 0.77 to 120 ng/g with the mode of 2.4 to 7.2 ng/g and 0.64 to 147 ng/g with the mode of 2.8 to 8.4 ng/g. There were no relationships among correlation of the three BFRs, which suggests that the BFRs would be individually emitted from different sources to air with the discrimination of HBCDs isomers.