科研之友
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摘要
Infant hair is a good medium to assess the cumulative exposure level of infant in the mother's body. Chlorinated persistent organic pollutants were ubiquitous and with the highest volume concentration in the human body. In this experiment, 20 infant hairs were collected from Beijing. The sample was overnight incubated in HCl, extracted with the mixture of hexane and dichloromethane, and cleaned up by a cartridge filled with alumina and acidified silica. The final eluate was concentrated, and 16 kinds of typical chlorinated persistent organic pollutants were detected with gas chromatography-high resolution mass spectrometry ( HRGC-MS). The results showed that the detection limit of the target compounds in sample was 1. 00-2. 50 mu g/kg, the recovery of surrogate in all samples was more than 67. 6%, and the range of recoveries for target compounds in spiked sample was 62.5% 92. 3%. The positive rate is 100% for hexachlorobenzene, beta-HCH and p, p'-DDE, 85% for gamma-HCH, 50% for PCB28, and 40% for PCB52. The concentrations of Hexachlorobenzene, HCHs, DDTs and PCBs were 5. 48-8. 40 mu g/kg, 3.86-27. 1 mu g/kg, 1. 16-18.3 mu g/kg and 2. 20-22. 1 mu g/kg, respectively. The average concentrations were 7. 84 mu g/kg for hexachlorobenzene, 6.93 mu g/kg for HCHs, 5.53 mu g/kg for DDTs, and 3.44 mu g/kg for PCBs. The method and the analysis results can be used to evaluate the accumulation level and cumulative exposure level of 16 target compounds for fetal in mother's body.
- 出版日期2015-1
- 单位中国农业大学; 中国疾病预防控制中心
