香烟中自由基的电子自旋共振检测及自由基与焦油含量的相关性研究

目的 研究香烟烟气中自由基的检测及样品处理方法，分析香烟烟气中自由基成分，探讨各种有害成分之间的相关性。方法 用电子自旋顺磁共振仪(ESR)及自制的配套装置对香烟烟气中的气相及粒相自由基含量进行分析检测。结果 无论香烟类型或品牌，烟气中自由基的主体是气相自由基，含量是粒相自由基的10—30倍；国产香烟样品中气相自由基含量低于进口品牌，而粒相自由基的含量水平较低且相近。结论 ESR及配套装置可以方便地应用于香烟烟气自由基成分的分析检测：香烟烟气中的自由基成分主要为气相自由基；同品牌香烟中自由基含量与焦油、烟碱的含量呈正相关。因此，一般不能依据香烟焦油含量推断香烟中的自由基，特别是气相自由基含量水平；使用活性炭滤嘴对气相、粒相自由基均有降低作用。

Relationship Between Free Radical Content and Tar Content in Cigarettes

Objective To study the methods of preparing samples, analyse free radical in smoke of cigarette and the relationship between free radical and the other harmful components in the cigarette smoke. Methods The contents of two types of free radical in smoke of 13 kinds of cigarettes were determined with electron spim resonance(ESR) and the self-made equipment. Results The analytic results showed that the main component was the free radical in gas state in all cigarette samples and it was about 10-30 times higher than the content of free radical in solid state. The content of free radical in gas state of cigarette made in China was lower than that made in foreign country. Conclusion The analysis method using ESR and the self-made equipment will be easily used in the related experiment; The level of free radical in gas and solid state is positively related to the level of tar and nicotine in the cigarette sample of same trademark but it is not the same in the samples of different trademark. Therefore, we can not to infer the content of free radial in cigarette smoke by the content of tar and nicotine in it,especially for the content of free radial in gas state. Using charcoal filter is benefit to reduce the level of free radical in cigarette smoke.