烟草中总挥发酸含量的分析方法研究  

Study on the analytical method of total volatile acids in tobacco

作　　者：贾春晓[1] 曲志刚[2] 毛多斌[3] 田宁亚 张文叶[3] 张俊松[3] 

机构地区：[1]郑州轻工业学院化学工程系,河南郑州450002 [2]北京卷烟厂,北京100024 [3]郑州轻工业学院食品与生物工程系,河南郑州450002

出　　处：《郑州轻工业学院学报》2002年第1期3-6,共4页Journal of Zhengzhou Institute of Light Industry（Natural Science）

摘　　要：通过对烟草中挥发酸总量分析的全过程进行研究 ,确定出该项分析的最佳条件为 :10g烟样 ,用磷酸溶液调节其初始pH =2 0 ,用去离子水进行水蒸气蒸馏 80min ,接收馏出液 4 0 0mL(挥发酸总量≤ 0 3%时接收 30 0mL) ,用苯酚红作指示剂 (或采用自动电位滴定 ,终点pH =8 0 ) .在此条件下 ,纯样品的回收率可达 96 0 4 % .The detailed research on quantitative analysis of total volatile acids in tobacco was reported.The best condition of this analysis method was obtaining:adjusting the beginning acidity (pH) of 10 g tobacco samples to 2.0 by H 3PO 4 solution, distilling the samples for 80 min using de ionized water by steam distillation,and receiving the distillate 400 mL or 300 mL in the parallel determinations when the continent of total volatile acids in tobacco was ≤0.3%,phenol red was used as indicator or automatic potentiometric titration can be used and the end point of pH was 8.0.The recovery of pure matters reached up to 96.04% under this condition.

关 键 词：烟草 挥发酸 总量分析 烟样 PH值调节 蒸馏 

分 类 号：TS411[农业科学—烟草工业]