부산대학교 도서관

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.chemosphere.2005.06.059 Byline: Peng Guan (a)(b), Morihiro Tajimi (a), Ritei Uehara (a), Makoto Watanabe (a), Izumi Oki (a), Toshiyuki Ojima (a), Yosikazu Nakamura (a) Keywords: Breast milk; Congeners; Dioxins; Japan Abstract: Exposure to dioxins has raised much public concern recently. We determined the congeners' distribution of polychlorinated-dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and dioxin-like polychlorinated biphenyls (dl-PCBs) in the breast milk samples collected in Tokyo, Japan. Breast milk was taken from 240 mothers, 30 days after delivery in 1999 and 2000 in Tokyo, Japan. The actual concentration and TEQ concentration of PCDDs (14 congeners), PCDFs (15 congeners), and dl-PCBs (12 congeners), and each congener's contribution to the total TEQ level were calculated. Among all the samples, PCDDs accounted for 34.8%, PCDFs accounted for 23.5%, dl-PCBs accounted for 41.7%, which was also similar in the breast milk from the primiparae and secundiparae. The main contributors to the total TEQ with increasing percentages were 2,3,4,7,8-PeCDF, 1,2,3,7,8-PeCDD and 3,3',4,4',5-PCB (#126), and they accounted for more than 65% of the total TEQ. Detailed congener analysis in breast milk samples is effective to understand dioxin sources. Author Affiliation: (a) Department of Public Health, Jichi Medical School, 3311-1 Yakushiji, Minamikawachi, Tochigi 329-0498, Japan (b) Department of Epidemiology, School of Public Health, China Medical University, No. 92 North Second Road, Heping District, Shenyang 110001, China Article History: Received 21 December 2004; Revised 19 April 2005; Accepted 25 June 2005