Analysis on the Organic Bromine in the Atmosphere in Beijing

Gaseous and particulate phase samples are simultaneously collected at a downtown site in Beijing from April 2004 to December 2004 using a modified high-volume air sampler and determined by in strumental neutron activation analysis(INAA) for the concentrations of extractable organic-bromine(EOBr) and extractable persistent organic-bromine(EPOBr).Results show that the average concentrations of EOBr are 6.2 ng/m~3(1.0~18.5 ng/m~3) and 18.3 ng/m~3(2.3~73.4 ng/m~3) in gaseous and particulate phase,respectively;the average concentrations of EPOBr are 0.95 ng/m~3(0.02~2.2 ng/m~3) and 1.0 ng/m~3(0.09~3.0 ng/m~3) in gaseous and particulate phase;EPOBr accounts for(15.3%)(1.9%~62.8%)in gaseous phase and 5.5%(0.8%~55.6%) in TSP of total EOBr.