北京市居民膳食中新型溴代阻燃剂暴露水平研究

Total dietary exposure assessment of emerging brominated flame retardants in Beijing

目的研究北京市居民通过膳食摄入6种新型溴代阻燃剂暴露特征。方法采用大气压气相色谱-串联质谱法（APGC-MS/MS）测定北京市总膳食样品中二甲基四溴苯（pTBX）、五溴甲苯（PBT）、五溴乙苯（PBEB）、六溴苯（HBB）、六氯环戊二烯-二溴环辛烷（DBHCTD）和1,2-双（2,4,6-三溴苯氧基）乙烷（BTBPE）的含量,并对结果进行分析,计算北京市居民的膳食暴露量。结果 61份总膳食样品中检出PBT、PBEB、HBB和BTBPE等4种新型溴代阻燃剂,含量在1.2～29.4 pg/g（湿重）之间。动物性样品中HBB和BTBPE的含量普遍高于植物性样品,且差异有统计学意义（P〈0.05）;北京市居民6种新型溴代阻燃剂膳食暴露量为296.8 pg/（kg·d）。结论北京市居民总膳食中新型溴代阻燃剂暴露水平较低,动物性样品中的肉类样品是BTBPE膳食摄入的主要来源。

Objective To estimate the exposure characteristic of six emerging brominated flame retardant for Beijing residents by dietary intake. Methods 2,3,5,6-tetrabromo-p-xylene（pTBX）,pentabromotoluene（ PBT）,1,2,3,4,5-pentabromo-6-ethylbenzene（ PBEB）, hexabromobenzene（ HBB）, hexachlorocyclopentadienyldibromocyclooctane（ DBHCTD） and 1,2-bis（ 2,4,6-tribromo phenoxy） ethane（ BTBPE）were detected by atmospheric pressure gas chromatography tandem mass spectrometry（ APGC-MS /MS） in total dietary samples from Beijing. Dietary intake assessments of human exposure were carried out according to results of determination. Results PBT,PBEB,HBB and BTBPE were occurred with concentration between 1. 2- 29. 4 pg / g wet weight. The detection rates of HBB and BTBPE in animal-origin samples were higher than those in plant-origin samples,and there were significant differences（ P〈0. 05）. The exposure level of Beijing residents to six emerging brominated flame retardants were 296. 8pg /（ kg·d）. Conclusion The exposure level of emerging brominated flame retardants by dietary intake in Beijing is relatively low,and meat is the main source of BTBPE dietaryintake.