【摘要】 建立了以索氏抽提,凝胶渗透色谱及硅胶-氧化铝复合层析柱净化,测定蔬菜中13种多溴联苯醚(PBDEs)的GC-NCIMS分析方法,方法的检出限以干重计为5.4～15.7pg/g,加标样品的回收率和RSD分别为78%～97%和0.6%～10.0%。还研究了蔬菜中的PBDEs在人胃肠中对人体的生物有效性,胡萝卜和菠菜中PBDEs的总含量分别为424.1pg/g和981.3pg/g,对人体的平均生物有效性分别为33.5%和2.6%,计算得到13种PBDEs在胡萝卜和菠菜中的生物有效含量分别为132.6pg/g和26.1pg/g,研究结果对污染物的暴露风险评估有参考价值。更多还原

【Abstract】 A method for 13 polybrominated diphenyl ether(PBDEs) detection in vegetable was developed.The samples were treated by Soxhlet extraction,and cleaned up by gel permeation chromatography column and multilayer silica-alumina column.The detection of analytes was performed by gas chromatography mass spectrometry negative ion chemical ionization detection(GC-NCI MS).The results showed that the detection limits of 13 tri- to hepta-BDEs were in the range of 5.4-15.7 pg/g dry weight.The recoveries were between 78% and 97% with RSD of 0.6%-10.0%.In addition,the bioaccessibility of PBDEs in the simulating human gastrointestinal tract were investigated.The concentrations of PBDEs in carrot and spinach were 424.1 pg/g and 981.3 pg/g,and the average bioaccessibility were 33.5% and 2.6%,respectively.The total bioaccessible concentrations of PBDEs in carrot and spinach were 132.6 pg/g and 26.1 pg/g,respectively.The obtained results may provide useful information for pollutant exposure assessment to human.更多还原