卷烟主流烟气pH值的测定及其与感官评吸的相关性研究

Determination of pH in Cigarette Mainstream Smoke and the Correlation with Sensory Quality

用冷肼捕集方式对卷烟主流烟气采用三种吸收液进行捕集,对其吸收液进行pH值测定,选取以50%(V/V)异丙醇作为吸收液测定卷烟烟气pH值的合适方法,并对这些烟进行感官评吸,对pH测定结果与感官得分作相关性分析。结果表明,在吸收液中测定pH值分别呈下列顺序:50%异丙醇>水>饱和食盐水;烤烟、晒烟pH值范围在酸性内,白肋烟pH值在碱性范围内;对这些烟的感官评分和pH值测定数据作相关性分析发现,pH值与降低综合感受的苦味、收敛、残留、刺激和热感等感官指标的相关性极显著。因此,调节烟气的pH值可在一定范围内达到改善其口感的作用。

The cigarette mainstream smoke were absorbed by three types absorbing solutions with impingers and measured the pH of the solutions, and then measured the pH of a group of cigarettes smoke, 50% （V/V） isopropanol absorbing solutions was the suitable method to measure the pH of cigarettes smoke, as well as the cigarettes quality had been evaluated by the sense of evaluating experts. Correlation analysis between the result of the pH and the core of sense evaluating was made. The results showed that according to the relative size of pH measured the absorption solutions as following： 50% （V/V） isoprop anol〉water〉saturated sodium chloride solution; both cured and sun-cured type cigarette the pH were less than 7, while burley tobacco was more than 7. From the correlation indicated that there were significantly correlated between pH and the bitterness, constringency, residue, irritant and scorching. Therefore adjust the pH of cigarette mainstream smoke at a certain range could improve the taste of the cigarette.