吉林省公主岭市青少年头发中多氯联苯污染水平的研究

应用气相色谱-质谱（GC-MS）分析了23份采自吉林省公主岭市青少年（12～18岁）头发样品中的30种多氯联苯（PCBs）,并对头发样品中PCBs的构成和来源进行了解析,对其与性别的相关性进行了分析.结果表明,头发样品中PCBs的检出率为100%,PCBs总含量ΣPCBs为（68.85±36.72）ng.g-1,含量范...

Levels of Polychlorinated Biphenyls in Adolescents' Hair from Gongzhuling, Jilin

Adolescents'(12-18)hair samples(n=23) collected from Gongzhuling Jilin were analyzed for 30 polychlorinated biphenyl (PCB) congeners by gas chromatograph-mass spectrometer(GC-MS).The distribution characteristics, sources and relationship with genders of PCBs in adolescents' hair were addressed as well. The results indicated that the detection frequency of PCBs were 100% with average concentration of (68.85±36.72) ng·g^-1 and detection range from 11.66 ng·g^-1 to 127.86 ng·g^-1,respectively. This region was contaminated to some extent. CB-28, CB-52, CB-87 and CB-82 were the major congeners which occupied 62%. Penta-CBs were the dominant contributors(39%), followed by tetra-CBs(29%) and tri-CBs(18%).The different distributions of PCBs congeners in hair from other human tissues and the air are believed to be the fact that PCBs in human hair not only came from endogenous dietary uptake of the contaminants, but also from exogenous atmospheric deposition. The results clearly indicated that these pollutants mainly came from industrial pollution.When gender was considered, significantly higher concentrations for most of the investigated contaminants were found in female compared with male.