卷烟挥发产物冷凝分级装置的构建与评价

Construction and Evaluation of Condensate Grading Device for Cigarette Volatile Product

构建了一套卷烟挥发产物的冷凝分级装置,通过控制冷源流速等条件在收集管间形成一定温度梯度,使得不同组分依其沸点、含量和饱和蒸汽压的不同,在不同的收集管中被冷凝。考察了冷源类型、冷源传输管疏密程度及冷源传输速率等因素对冷凝分级器温度梯度的影响。在优化的条件下使用该装置对卷烟挥发产物进行捕集,经乙酸乙酯提取后用GC-MS进行分析,结果表明以超低温氮气作为冷源,冷凝分级器温度梯度为(-35±5)℃^(-65±5)℃时,1#~10#捕集管中分别收集到了320,286,201,172,135,107,98,98,85,85个化合物,其中包括高沸点的新植二烯、中沸点的苯甲醛、低沸点的2-乙烯基呋喃等不同的化合物。大多数化合物随着沸点、饱和蒸汽压的不同,在捕集管中呈正态分布,具有较好的冷凝分级效果。

A condensate grading device for cigarette volatile product was constructed by controlling the flow rate of cold source to collect and condense components with different boiling points, concentrations and saturated vapor pressures in collection tube. The cold source type, the density of the cold source transfer line, the cold source transmission rate and other factors on the temperature gradient condensation classifier were investigated. Under the optimized conditions, the volatile products of cigarette were trapped by the condensate grading device and then extracted with ethyl acetate and analyzed by GC-MS. By using ultra-low temperature nitrogen as a cold source, the temperature gradient of condensation grading device can be controlled in the range from （-35±5）℃ to （-65±5）℃ and 320, 286, 201, 172, 135, 107, 98, 98, 85, 85 compounds with different boiling points and saturated vapor pressure, such as neophytadiene with high-boiling point, benzaldehyde with medium boiling point and 2-vinyl furan with low boiling point, were collected into trap tubes 1 #-10 #. Most of the compounds showed normal distribution and good condensing classification effect.