北京地区市售蔬菜中多溴联苯醚的污染状况

发布时间：2019-03-20 17:00

【摘要】：目的了解蔬菜中多溴联苯醚(PBDEs)的污染水平和污染特征。方法于2014年1—3月采集北京居民日常食用的10种市售蔬菜样品,采用超声提取-复合硅胶柱净化-气相色谱质谱联用(GC-MS)方法对样品中42种PBDEs进行定性定量检测,并分析其污染水平和污染特征。结果各种蔬菜样品中均有PBDEs检出,PBDEs总含量为0.68~155.78pg/g湿重。不同种蔬菜其食用部位的PBDEs含量一般为叶菜类高于果菜类,如菠菜叶、小白菜叶、大白菜叶、芹菜叶、生菜、油菜叶、韭菜的PBDEs含量均较高,而尖椒、黄瓜、青椒中PBDEs的含量均较低。叶菜类蔬菜的可食用部位均为叶PBDEs含量较高,茎(梗)含量较低。不同蔬菜及同种蔬菜不同部位中各BDE单体检出率和含量不同,蔬菜中检出的主要BDE单体为BDE 47、BDE 99、BDE 153、BDE 28+33、BDE 75、BDE 66、BDE 154、BDE 183、BDE 118和BDE 209,检出率为44.4%~100%;未检出一溴联苯醚和八溴联苯醚。结论本次调查的蔬菜受到不同程度的PBDEs污染,以四溴、五溴和三溴联苯醚为主。
[Abstract]:Objective to investigate the pollution level and characteristics of polybrominated diphenyl ether (PBDEs) (PBDEs) in vegetables. Methods from January to March, 2014, the samples of 10 kinds of vegetables for daily consumption in Beijing were collected, and 42 kinds of PBDEs in the samples were determined qualitatively and quantitatively by ultrasonic extraction-silica gel column purification-gas chromatography-mass spectrometry (GC-MS). And analyze its pollution level and pollution characteristics. Results PBDEs was detected in all kinds of vegetable samples, and the total content of PBDEs was 0.68~155.78pg/g wet weight. The contents of PBDEs in edible parts of different kinds of vegetables are generally higher than those of fruit vegetables, such as spinach leaves, small cabbage leaves, large white leaves, celery leaves, lettuce, oil leaves and leeks, while the content of PBDEs in spinach leaves, small cabbage leaves, large cabbage leaves and leeks is higher than that of spinach leaves, green pepper and cucumbers. The content of PBDEs in green pepper was lower. The edible parts of leafy vegetables were higher in PBDEs content and lower in stem (stem) content. The main BDE monomers detected in vegetables were BDE 47, BDE 99, BDE 153, BDE 2833, BDE 75, BDE 66, BDE 154, BDE 183, BDE 118 and BDE 209, and the main BDE monomers were BDE 47, BDE 99, BDE 153, BDE 2833, BDE 75, BDE 66, BDE 154, BDE 183, BDE 118 and BDE 209, The detection rate was 44.4% ~ 100%; Monobromodiphenyl ether and octabromodiphenyl ether were not detected. Conclusion the vegetables were polluted by PBDEs in different degrees, mainly tetrabrominated, pentabromoic and tribrominated diphenyl ethers.
【作者单位】：北京工商大学环境科学与工程系;
【分类号】：R155.5

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