Effects of Diammonium Phosphate on Free Nicotine Release in Smoke and Sensory Quality of Cigarette

To investigate the effects of diammonium phosphate(DAP) on the free nicotine release in smoke and sensory quality of cigarette, DAP solution was sprayed on equivalent cut tobaccos so that the mass percentages of DAP in cut tobacco became 0, 0.2%, 0.5%, 1.0%, 1.5%, 2.0%, respectively. The method of determining free nicotine in cigarette smoke was optimized. The p H of cut tobacco and the release of free nicotine in cigarette smoke were determined, and the sensory quality of cigarette was evaluated. The correlation of DAP addition rate with free nicotine release in cigarette smoke and cut tobacco p H were analyzed. The results showed that: 1)To extract and separate the free and bound nicotine in cigarette smoke with chloroform-neutral water system, the RSD was 3.46% and the recoveries rangedfrom 84.7% to 88.7%. 2) Within the tested range, DAP addition rate significantly positively linearly correlated to cut tobacco p H and free nicotine release in cigarette smoke. 3)The roasted aroma increased and impact of cigarette smoke generally presented an upward trend with the increase of DAP application rate not beyond 1.0%. At low addition rate, the major functions of DAP in cigarette were promoting the Maillard reaction in tobacco, improving roasted aroma and enriching tobacco aroma.