两种含氮高分子材料的热解烟气毒性评价

采用GA/T 506-2004中规定的产烟模型对2种含氮高分子材料进行热解,将实验动物动态暴露于热解烟气中并使用傅立叶变换红外分析仪(FTIR)对热解烟气进行成分分析,将成分分析的结果用模型进行计算.结果表明,在热解温度为600 ℃时,腈纶毛线的热解烟气毒性大大高于羊毛地毯的热解烟气毒性;在不考虑NO2的情况下N-气体值在0.5～1.3之间有受试动物死亡;烟气毒性的研究中数学计算方法不一定能完全替代动物实验;动物实验与成分分析、数学计算相结合在现阶段还是研究烟气毒性的较为有效的手段.

Toxicity assessments of the thermal decomposition products of two nitrous polymers

Two methodologies have been developed for obtaining and evaluating smoke toxicity data. One is an animal model and the other involves interpreting gas measurement data using the N-Gas Model. FT-IR analytical data on the thermal decomposition products of two types of nitrous polymers were obtained from GA/T 506-2004 tests and used for N-Gas Model calculations. Comparing the results of the animal model with the N-Gas value, shows that the thermal decomposition products of polyacrylonitrile are far more toxic than the thermal decomposition products of wool carpet. Taking no account of NO2 , when the N-Gas value is between 0.5 - 1.3, some fraction of the test animals died. It can be argued that a mathematic model cannot fully substitute for an animal model. Using animal models and analytical methods together may be the best means of toxicity assessment.