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http://dx.doi.org/10.4491/KSEE.2012.34.1.007

Estimation of Indicator PCBs Exposure in Infants via Breast-Feeding Period  

We, Sung-Ug (Department of Urban Environmental Engineering, Kyungnam University)
Yoon, Cho-Hee (Department of Urban Environmental Engineering, Kyungnam University)
Min, Byung-Yun (Department of Urban Environmental Engineering, Kyungnam University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.34, no.1, 2012 , pp. 7-15 More about this Journal
Abstract
The levels of indicator PCBs were determined in 132 human milk samples (Colostrum, 30th days after delivery, 60th days after delivery) collected in 2006 according to World Health Organization's (WHO) protocol. In addition, concentrations of indicator polychlorinated biphenyls (PCBs) were measured by the isotope dilution method with high resolution gas chromatograph/high resolution mass detector (HRGC/HRMS), which gave accurate and precise data for estimations of international trend and comparisons. Average daily intakes (ADIs) of all analytes were calculated. The median level of total indicator PCBs was 14 ng/g lipid, which is significantly lower than the level found in individuals from other countries. PCB congeners 138, 153 and 180 accounted for about 65% of the sum of the indicator congeners analyzed. The concentration of the most abundant PCB 153 is positively correlated with the concentration of the sum indicator PCBs (p<0.001). In this study, concentrations of total indicator PCBs significantly decreased with increasing number of children for a mother, indicating that parity and breast-feeding period an important role in the accumulation and elimination of these compounds in lactating women. The ADI for the median of total indicator PCBs for an infant was evaluated at $0.077{\mu}g/kg{\cdot}bw/day$ from birth to 6 months of age. The present study shows that concentrations of PCB 118 primipara breast milk have decreased 25~35 since 1998, and that this trend is continuing.
Keywords
Indicator PCBs; Breast Milk; Average Daily Intakes; Exposure;
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