十溴二苯醚的降解机理研究  

Study on Degradation Mechanism of Decabromodiphenyl Ethers

作　　者：林晓珊[1] 吴惠勤[1] 黄晓兰[1] 马叶芬[1] 朱志鑫[1] 罗辉泰[1] 张春华[1] 黄芳 邓欣[1] 

机构地区：[1]中国广州分析测试中心广东省分析测试技术公共实验室,广东广州510070

出　　处：《分析测试学报》2013年第8期993-997,共5页Journal of Instrumental Analysis

基　　金：广东省工业攻关计划项目(2006B36302002)

摘　　要：采用气相色谱-质谱(GC-MS)法研究十溴二苯醚在不同存放时间、不同存放温度、不同浓度以及光照下的降解情况,并对其降解产物进行检测,进一步推断其降解机理。实验结果显示,十溴二苯醚在室温下随着存放时间的延长发生降解,在光照下,特别是紫外线照射下,降解速度非常快,10 h后十溴二苯醚的降解率达到84.8%,其主要的降解机理是脱溴,降解产物为九溴二苯醚、八溴二苯醚、七溴二苯醚、六溴二苯醚、五溴二苯醚,从而提高了十溴二苯醚的潜在毒性。该研究能够更好地指导电子电气产品中十溴二苯醚的检测。Degradation mechanism of decabromodiphenyl ethers was studied by gas chromatography mass spectrometry（ GC -MS）. Effects of storage time, storage temperature, light and concentration of decabromodiphenyl ethers on the degradation proccess of decabromodiphenyl ethers were evaluated, and the degradation products were detected. The results showed that the decabromodiphenyl ethers were degraded as the storage time extended at ambient temperature. The degradation rate was rapid, and 84. 8% decabromodiphenyl ethers were degraded in 10 h when they were exposed to ultraviolet rays. The major degradation mechanism of decabromodiphenyl ethers were debromination, and the degradation products were the following potentially toxic compounds： nonabromodiphenyl ethers, oc tabromodiphenyl ethers, heptabromodiphenyl ethers, hexabromodiphenyl ethers and pentabromodi phenyl ethers. This study can provide a scientific guidance for determination of decabromodiphenyl e thers in electrical and electronic equipments.

关 键 词：气相色谱-质谱法(GC—MS) 十溴二苯醚 降解机理 

分 类 号：O657.63[理学—分析化学] TQ314.248[理学—化学]