中国烟草科学2017，Vol.38Issue(3)：56-60,5.DOI:10.13496/j.issn.1007-5119.2017.03.010
低场核磁共振法测定烘烤过程中烟叶水分
Determination of Moisture in Tobacco Leaves during Curing Process by Low-field NMR
摘要
Abstract
In order to fully understand the change of moisture content in different positions of tobacco leaves during curing process, and to improve the moisture detection efficiency of tobacco leaf during curing, using the upper leaf of Qinyan96 as test material, Low-field NMR was used to determine the moisture content in lamina and midrib. The results were compared with those determined by a conventional oven method. The results showed that: (1)The map of different positions of tobacco leaves showed that there were 3 states of water in lamina, bound waterT21(0.1-1 ms), semi-bound waterT22(1-10 ms) and free waterT23 (100-1000 ms). There were 2 states of water in midrib, bound waterT21 (1-10 ms) and free waterT22 (100-1000 ms). (2)The inversion spectrum oflamina and midrib has an extremely significant positive correlation with the water mass and moisture content of dry base (the coefficient of determination are in turn 0.9847, 0.9929, 0.9952,P <0.01). (3) Comparing with the conventional oven method, the stability of Low-field NMR was better, which is suitable for rapid and accurate detection of thelamina and midrib moisture content of tobacco leaves during curing.关键词
低场核磁/烘烤/烟叶/水分Key words
low-field NMR/flue-curing/tobacco leaves/moisture分类
轻工纺织引用本文复制引用
宋朝鹏,李生栋,魏硕,谭方利,吴文信,许清孝,李宏光,方明..低场核磁共振法测定烘烤过程中烟叶水分[J].中国烟草科学,2017,38(3):56-60,5.基金项目
湖南省烟草公司郴州市公司项目"特殊烟叶烘烤技术研究"(201543100094001) （201543100094001）
