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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。
Gas chromatography-mass spectrometry (GC-MS) was used to study the degradation of decabromodiphenyl ether at different storage time, storage temperature, different concentrations and light conditions. The degradation products of decabromodiphenyl ether were also detected and the degradation mechanism was further deduced. The experimental results show that decabromodiphenyl ether degrades with storage time at room temperature and degrades very fast under irradiation of light, especially under UV irradiation. Degradation rate of decabromodiphenyl ether reaches 84.8% after 10 hours. , The main degradation mechanism is debromination, the degradation products are nonabromodiphenyl ether, octabromodiphenyl ether, heptabromodiphenyl ether, hexabromodiphenyl ether, pentabromodiphenyl ether, thereby increasing the decabromobiphenyl Potential toxicity of ether. The study can better guide the testing of decabromodiphenyl ether in electrical and electronic products.