Concentrations of polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans, and polychlorinated biphenyls in blood and breast milk collected from pregnant women in Sapporo City, Japan
| Autor: | Takao Iida, Eiji Yoshioka, Jumboku Kajiwara, Takashi Todaka, Chihiro Miyashita, Daisuke Onozuka, Seiko Sasaki, Hironori Hirakawa, Masutaka Furue, Motoyuki Yuasa, Hiroshi Uchi, Reiko Kishi |
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| Rok vydání: | 2011 |
| Předmět: |
Adult
Polychlorinated Dibenzodioxins Environmental Engineering Health Toxicology and Mutagenesis Maternal blood Breast milk Cohort Studies chemistry.chemical_compound Animal science Japan Paired samples Pregnancy Humans Environmental Chemistry Benzofurans Biphenyl Persistent organic pollutant Milk Human Waste management Public Health Environmental and Occupational Health food and beverages General Medicine General Chemistry Dibenzofurans Polychlorinated Polychlorinated Biphenyls Pollution chemistry Polychlorinated Dibenzo-p-dioxins Female Polychlorinated dibenzofurans Arithmetic mean |
| Zdroj: | Chemosphere. 85:1694-1700 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2011.09.014 |
| Popis: | We measured the concentrations of polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), dioxin-like polychlorinated biphenyls (PCBs), and non-dioxin-like PCBs in paired samples of blood and breast milk collected from 67 secundiparas in Sapporo City, Japan, and combined this data with those of the 30 secundiparas previously measured. The arithmetic mean total toxic equivalents (TEQ-WHO) concentrations of PCDDs, PCDFs, non-ortho PCBs, and mono-ortho PCBs in blood and breast milk of the 97 secundiparous subjects were 3.0-23 (mean: 13, median: 14) and 2.7-20 (mean: 8.6, median: 8.5) pg TEQ g(-1) lipid, respectively. The sums of the concentrations of 56 non-dioxin-like PCB congeners that were measured in the subjects' blood and breast milk were 16-326 (mean: 107, median: 100) and 12-252 (mean: 73, median: 67) ng g(-1) lipid, respectively. The partitioning ratios of individual congeners of PCDDs, PCDFs, dioxin-like PCBs, and non-dioxin-like PCBs from blood to breast milk in secundiparas were almost the same as those of primiparas that have been recently reported, suggesting that the partitioning ratios of these compounds from maternal blood to breast milk in women is little affected by delivery. Furthermore, the partition of PCB congeners with chlorine at the 2-, 3-, 4'-, and 5-positions or the 2-, 4-, 4'-, and 5-positions of the biphenyl ring from the blood to the breast milk tended to occur at a higher level than that of other congeners. In particular, the levels of tetraCB-74 and hexaCB-146 in the breast milk for both primiparous and secundiparous mothers were slightly higher than those in the blood. |
| Databáze: | OpenAIRE |
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