卷烟烟气pH与烟气总粒相物中游离烟碱的关系

对烟气总粒相物pH的测定方法进行了实验研究,确定了准确测定烟气总粒相物pH的方法。对烟气总粒相物中游离烟碱含量的测定方法进行了实验研究,确定了用配备FID的气相色谱仪准确测定烟气总粒相物中的游离烟碱含量的方法。按照国标方法测定烟丝中总植物碱、还原糖、总氮、挥发碱的含量;按照国标方法测定卷烟的焦油、烟碱、水分。请评吸专家对卷烟进行评吸,针对烟气劲头和刺激性进行打分。对测定结果进行分析比较,研究结果表明:烟气中游离烟碱占总烟碱的比例与烟气总粒相物pH呈现显著的线性相关关系;烟丝总氮含量与烟气总粒相物pH呈显著线性相关;烟气烟碱、烟丝总烟碱、还原糖对烟气劲头有较大影响,而对烟气刺激性影响较大的因素有烟气总粒相物pH、烟叶pH、总氮等。 

Studies on the relationship between pH value and free nicotine in cigarette smoke

The measurement method of total particulate matter (TPM) pH was studied. The contents of free nicotine in TPM were measured by GC equipped with FID. Routine components of tobacco and cigarette smoke were determined according to national standards. The impact and irritancy of cigarette smoke were tested by sensory panel. Results indicated that the relationship between proportion of free-nicotine to total-nicotine in TPM and smoke pH was highly significant. The correlation between total nitrogen and TPM pH was highly significant as well. Sugar in tobacco、nicotine of smoke and tobacco are dominant factors affecting the cigarette strength. Total nitrogen content of tobacco, the pH of TPM and whole tobacco affect the irritancy of cigarette.