室内空气气相多溴联苯醚的含量及来源分析

Levels and sources apportionment of gaseous polybrominated diphenyl ethers in indoor air

利用中流量大气采样器采集了校园7个有代表性的室内空气样品,利用GC-ECD和GC/MS测定多溴联苯醚(polybrominated diphenyl ethers,PBDEs)的种类和含量.结果表明:在所测样品中,共发现14种PBDEs同类物,其中BDE-17、BDE-28、BDE-47、BDE-99、BDE-100、BDE-153、BDE-190的检出率为100%.∑_(14) PBDEs的质量浓度为78.1~414.0pg/m^3,平均质量浓度为266.6pg/m^3,质量浓度最高的同类物是BDE-100.所测室内空气样品中的PBDEs主要以五溴联苯醚污染物为主,其次为八溴联苯醚污染物.不同类型室内空气中PBDEs浓度差异较大,电器数量、家具数量、装修年份是产生差异的重要因素.

Seven representative indoor air samples were collected using a medium volume sampler on a university campus.The species and concentrations of polybrominated diphenyl ethers（PBDEs）were analyzed using GC-ECD and GC/MS.The results showed that 14 PBDEs were detected in the samples.Among the detected PBDEs,detection of BDE-17,BDE-28,BDE-47,BDE-99,BDE-100,BDE-153,BDE-190 were100%.The total concentration of PBDEs（∑14 PBDEs）ranged from 78.1 to 414.0 pg/m3 with the mean concentration of 266.6 pg/m3,and BDE-100 was the dominant congener.The indoor air pollutants were mainly Penta-BDE,followed by Octa-BDE commercial products.It indicated that PBDEs concentration variations were large in different rooms.The number of electrical equipment,the number of furniture and the year of decoration were important factors to affect the concentration variations of PBDEs.