1,were used to investigate the relationship of nicotine conversion rate with individual alkaloid contents and the ratio of anatabine to nornicotine in ethylene treated leaves and air-cured leaves.

Preconcentration and separation of tobacco alkaloids by capillary zone electrophoresis;

This paper seeked to explore a simple routine analytical method to separate and determine four major alkaloids in tobacco and cotinine of metabolism of nicotine, and apply this methodology to analyze alkaloids and cotinine of larvae, frass, and tobacco, in order to determine the adaptation mechanism of noctuid caterpillars to tobacco alkaloids.

The chemical components and nicotine in smoke of 25 different grades of flue-cured tobacco leaves were determined,and the correlation between the nicotine in smoke and chemical components was studied.