Abstract
Forty-eight human breast milk samples were collected from mothers in Bei**g. The hexachlorocyclohexane (HCH) and dichlorodiphenyltrichloroethane (DDT) (including α-HCH, β-HCH, γ-HCH, δ-HCH, p,p′-DDE, p,p′-DDD, o,p′-DDT, and p,p′-DDT) contents of the samples were determined by gas chromatography/electron capture detection and gas chromatography/mass spectrometry. α-HCH, β-HCH, γ-HCH, p,p′-DDE, p,p′-DDD, and p,p′-DDT were detected at rates of 20, 100, 10, 100, 10, and 22 %, respectively. The average residue levels in the samples were 174.6 ng/g fat for β-HCH, 333.8 ng/g fat for p,p′-DDE, 6.57 ng/g fat for α-HCH, 7.67 ng/g fat for γ-HCH, 4.18 ng/g fat for p,p′-DDD, and 11.4 ng/g fat for p,p′-DDT. The results showed that the infants’ daily intake levels of HCH and DDT were 0.95 and 1.76 μg/kg body weight/day, respectively. Our result suggested that the total residue level of these organochlorine pesticides in breast milk from Bei**g decreased and was lower than that from other coastal and heavy industrial cities in China. On the other hand, the levels of HCH and DDT were higher than those from some developed countries, but lower than those from other develo** countries such as India.
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This work was supported by the Geological Survey Project of China (project no. 1212011120274). We thank all the mothers who generously donated milk samples.
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Song, S., Ma, X., Tong, L. et al. Residue levels of hexachlorocyclohexane and dichlorodiphenyltrichloroethane in human milk collected from Bei**g. Environ Monit Assess 185, 7225–7229 (2013). https://doi.org/10.1007/s10661-013-3096-4
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DOI: https://doi.org/10.1007/s10661-013-3096-4