夜鹭卵中几种多氯联苯(PCBs)的残留特征

 分析了江苏无锡鼋头渚和江西共青城夜鹭卵中多氯联苯同系物的残留状况.无锡地区样品中检出6种PCB同系物-28,52,101, 138,153,180-,其中高氯取代的PCB 153,138,180占所测PCBs总量的85%以上;共青城样品中只检出3种PCB同系物-52,153,180-,其中高氯取代的PCB 153和180占所测PCBs总量的95%以上.可见生物样品中高氯取代的PCBs更容易富集.无锡地区样品中PCBs的残留水平比共青城样品高,其中PCB180的残留量差异显著-P=0.003<0.01-.无锡工业发展水平高于共青城可能是导致两地间样品差异的原因,因此可以通过对夜鹭卵中PCBs的残留量来监测区域环境中PCBs的污染状况.

Residue character of polychlorinated biphenyls (PCBs) in eggs of night heron.

The residue situation of PCB congeners in eggs of night heron breeding in Wuxi area of Jiangsu and Gongqing City of Jiangxi was analyzed. 6 PCB congeners (PCB 28, 52, 101, 138, 153, 180) were detected in samples from Wuxi, of which PCB 153, 138, 180 accounted to 85 percents of the ∑PCBs in samples, whilst only 3 PCB congeners (52, 153, 180) were detected in samples from Gongqing, of which PCB 153, 180 accounted to over 95 percents of the ∑PCBs, indicating that PCB congeners with more chlorine were more easily accumulated in organisms. The residue levels of PCBs in samples from Wuxi were higher than those from Gongqing, and the difference of PCB 180 residue amount in samples from these two places was significant (P=0.003<0.01). This difference might be caused by the higher level of industrial development in Wuxi, so the residue amount of PCBs in eggs of night heron can be used to monitor the PCBs contamination in regional environment.