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Relationship of Total Acidity of Tobacco Leaf Aqueous Infusion with its Stalk Position, Color and Grade

YUE XIAN_LING(1), LIU WEN_CHENG(1), and YAN KE_YU(2)1.Department of Production and Dispatch,Harbin Cigarette Factory,Harbin 150001,China2.Department of Food and Biotechnology Engineering,Zhengzhou Institute of Light Industry,Zhengzhou 450002,China  
The total acidity and pH value of aqueous infusion of 88 kinds of flue_cured tobacco were measured. The results showed that:1) the total acidity or pH value of aqueous infusion of same grade of tobacco leaf grown at different areas was different;2) the total acidity of aqueous infusion of upper leaf was the highest,followed by cutter,and that of lower leaf was the lowest;3) the total acidity of aqueous infusion of leaves from the three stalk positions displayed no evident correlation with their grade and color;and 4) the total acidity of tobacco leaf aqueous infusion (increased) with the increase of leaf thickness.
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