Methods:Free radical content in cigarette smoke,in which were added natural antioxidant,nanometer material,diatomite,activated carbone and antioxidant-activated carbone,were determined by ESR.

• 方法:在香烟中分别添加了天然抗氧化剂、纳米材料、硅藻土、活性碳及抗氧化剂组合物,并用电子顺磁共振仪(ESR)对香烟烟气自由基的含量进行测定。