| 吉林省公主岭市青少年头发中多氯联苯污染水平的研究 |
| 摘要点击 2464 全文点击 1964 投稿时间：2010-12-13 修订日期：2011-03-02 |
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| 中文关键词 头发 多氯联苯 气相色谱-质谱 吉林公主岭 来源 |
| 英文关键词 hair polychlorinated biphenyl(PCB) GC-MS Gongzhuling,Jilin source |
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| 中文摘要 |
| 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∑PCBs为(68.85±36.72) ng·g-1，含量范围为11.66～127.86 ng·g-1，该地区已经受到一定程度的污染.其中CB-28、 CB-52、 CB-87、 CB-82是头发中PCBs的主要同族体，占∑PCBs的62%，五氯联苯含量最高，占∑PCBs的39%，其次是四氯联苯和三氯联苯，分别占∑PCBs的29%和18%，高氯代PCBs含量较低，这不仅与人体内部组织中PCBs同族体组成有显著差异也有别于大气中PCBs的构成，表明该地区青少年头发中PCBs存在饮食等内源性和空气等外源性2个暴露途径.PCBs构成与我国生产和使用PCBs“指纹谱”相近，表明该地区PCBs来源于工业污染，与我国PCBs的使用历史有关.该地区女性发样中PCBs负荷显著高于男性(P<0.05)。 |
| 英文摘要 |
| 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. |
