Spin Trapping-ESR Study on Free Radicals in Cigarette Smoke
卷烟烟气中活性自由基的自旋捕获ESR研究

It is known that free radicals in cigarette smoke do harm to the human health The most common way to detect the reactive free radicals is electron spin resonance (ESR) spectroscopy in conjunction with the spin trapping method In this paper with a highly efficient and novel spin trap DEPMPO, the alkyl radicals and hydroxyl radical were obtained in the aqueous medium, among of which no adducts of alkoxyl radicals were discovered In view of the fact that more oxygen molecule dissolved in organic solvents as well as the priority of the ability of DEPMPO in capturing reactive free radicals and its character of ESR spectrum to those of PBN and DMPO, we considered that the trapped alkoxyl radicals in the previous paper may derive from the secondary radical products by oxidation of alkyl radicals