混合溶剂对烟用香精闪点的影响

为了提高烟用香精的安全管理水平，对国内外香精香料的安全管理办法和闪点的检测方法进行了调研，检测了部分烟用香精产品的闪点，考察了混合溶剂体系闪点的变化特点，以及混合溶剂对烟用香精闪点的影响。结果表明:①ASTM D6450闪点检测方法具有上样量小、测试温度范围宽等优点，适用于烟用香精闪点的检测；②烟用香精闪点的高低主要由配方中乙醇的体积分数决定，当乙醇的体积分数超过40%时，香精的闪点低于28 ℃；③通过使用混合溶剂，适当降低体系中乙醇的体积分数，可提高香精的闪点，进而提高烟用香精的安全性。 

Effects of mixed solvents on flash points of tobacco flavor samples

In order to improve the safety management of tobacco flavors, the safety management methods and flash point detection methods of flavor and fragrance at home and abroad were investigated. The flash points of some tobacco flavor samples were determined, and the variation characteristics of flash points of mixed solvent system and the influences of mixed solvents on flash points of tobacco flavor samples were analyzed. The results showed that: 1) ASTM D6450 flash point detection method featured a smaller sampling scale and a wider temperature determining range and was suitable for detecting the flash points of tobacco flavor samples. 2) The flash point of tobacco flavor sample was mainly determined by the volume fraction of ethanol in the formula, and it was lower than 28 ℃ when the volume fraction of ethanol was higher than 40%. 3) By using mixed solvents and appropriately reducing the volume fraction of ethanol in the flavor formula, the flash points of flavors could be controlled to improve the safety of tobacco flavors.