本研究于2014年在北京市采集母乳样品37份,按照国标方法采用高分辨气相色谱-高分辨质谱(HRGC-HRMS)结合同位素稀释技术,测定样品中二(嗯)英及其类似物含量.总毒性当量的均值为6.74 pg TEQ·g-1脂肪,多氯代苯并呋喃(PCDD/Fs)和二(嗯)英样多氯联苯(dl-PCBs)毒性当量的均值分别为5.06 pg TEQ·g-1脂肪和1.68 pg TEQ·g-1脂肪.与发达国家和地区相比,北京市普通人群的二(嗯)英及其类似物负荷水平较低.
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