The content of nornicotine is higher after flue-curing than before flue-curing. 湿度对烟碱含量影响无明显的规律性。
The color-reaction of nicotine with methyl orange was studied,and the satisfying result was obtained by applying it to determinate nicotine in smoke directly. 研究了甲基橙与烟碱的显色反应,并将其应用于直接测定烟气中的烟碱含量,获得较为满意效果。