Retention and Distribution Patterns of Phenolic Compounds in Cigarette Filters

To study the effects of filter structure on the retention and distribution patterns of phenolic compounds in cigarette filters,the retention rates of normal acetate filter to phenol,o-cresol,m/p-cresol,hydroquinone,resorcin and catechol under ISO and Health Canadian Intense(HCI) smoking regimes were compared,and the spatial distribution patterns of the 7 phenolic compounds in filter were investigated.The retention behavior in peripherally grooved acetate filter,paper-acetate combined filter and ventilated cavity acetate filter was also investigated under ISO smoking regime.The results showed that:1) The retention rate of normal acetate filter to phenolic compounds under ISO smoking regime ranged from 49% to 87%,and that to phenol and o/m/p-cresol was higher than to the others.Under HCI smoking regime,the retention rate to phenol and o/m/p-cresol increased to a certain extent,while that to the others decreased.2) The filters in the order of retention rate to phenolic compounds were:normal acetate filter≈peripherally grooved acetate filter>paper-acetate combined filter>ventilated cavity acetate filter.3) Acetate filter possessed obvious retention selectivity to phenolic compounds,which was the result of the interaction between phenolic compounds and filter materials.