薄荷类爆珠卷烟中薄荷醇的分布与转移

为考察薄荷醇在薄荷类爆珠卷烟中的分布及转移，剖析了薄荷醇在3个卷烟样品的烟支滤嘴、爆珠、烟丝、卷烟纸中的含量分布、主流烟气转移、逐口抽吸转移及不同放置时间的变化规律。结果表明:①烟支中薄荷醇的含量分布为:卷烟纸 ? 烟丝 < 滤嘴 < 爆珠，说明烟支近嘴端高比例分布有利于薄荷醇在主流烟气中的迁移；②主流烟气薄荷醇转移率8.90%~10.25%，滤嘴截留率67.18%~73.07%，说明大部分薄荷醇在抽吸过程中被截留在滤嘴中，薄荷醇的有效利用率较低；③随着卷烟的抽吸，主流烟气逐口薄荷醇的转移量也随之增加，前3口薄荷醇转移量增加较快，第4口开始呈稳步增加趋势，最后1口或倒数第2口达最大值，这与烟支抽吸过程凉感由弱到强一致；④爆珠中薄荷醇在放置12个月内未呈明显变化；滤嘴、烟丝、主流烟气薄荷醇放置前6个月内未呈明显变化，但放置9个月后呈减少趋势，12个月后呈明显加速减少趋势，即薄荷类卷烟的市场货架期最好控制在1年以内。 

Distribution and transfer of menthol in mentholated cigarette with breakable capsule in filter

In order to study the distribution and transfer of menthol in mentholated cigarette with breakable capsule in filter, menthol content in filter, breakable capsule, cut tobacco and cigarette paper, the puff-by-puff transfer amount of menthol in mainstream smoke, and the variation of menthol content with time were investigate in three samples.. The results showed that: 1) The menthol content in cigarette can be ranked as: cigarette paper ? tobacco < filter < breakable capsule, indicating high proportion distribution near cigarette filter is beneficial to menthol migration in mainstream smoke; 2) The menthol transfer rate in mainstream smoke was 8.90%~10.25%, and the interception rate of filter was 67.18%~73.07%, indicating that most menthol was trapped by the filter and effective utilization rate of menthol was low; 3) As cigarettes were smoked puff-by puffy, the transfer amount of menthol increased gradually. The first three puffs increased rapidly, the fourth puff began to increase steadily, and the last or penultimate puff reached the maximum, which is consistent with cigarette smoking process from weak to strong cool feeling; 4) There was no significant change of menthol in the breakable capsule within 12 months of storage. Menthol in filter, cut filler and mainstream smoke did not reduce significantly in the first six months, but decreased after 9 months and further decrease in a faster pace after 12 months, indicating the best shelf-life of mentholated cigarette is one year.