Abstract: By using methods such as constant temperature water bath extraction, atmospheric pressure concentration, conventional chemical index detection, simultaneous distillation extraction, and GC-MS internal standard quantitative detection of aroma components, the extraction rate and changes in aroma components of tobacco raw materials after the addition of cosolvents （hop∶koji extract∶Tween 80=2∶5∶10, mass ratio） were analyzed. The results showed that after adding cosolvents to the tobacco raw materials for paper making, the extraction rates of all three tobacco raw materials increased. The extraction rates of tobacco stems, mixed raw materials, and tobacco fragments increased by 7.88, 0.12, and 0.09 percentage points, respectively. The extraction rates of reducing sugars, total alkaloids, total nitrogen, and chloride ions in tobacco raw materials with the addition of cosolvents were higher than those without the addition of cosolvents. After adding cosolvents to tobacco raw materials, the types and contents of ketones, aldehydes, furans, and esters increased, while the content of megastigmatrienone increased; after adding cosolvent to tobacco stems, the content of 5-methyl-2-furan methanol decreased. The addition of cosolvents could improve the extraction rate of tobacco raw materials and increase the aroma components content of some tobacco raw materials.

Key words: cosolvent, extraction rate, aroma components, tobacco raw materials