烟草科技
2016-03-29 星期二
烟草工艺:2020 ,8:65-71
郑松锦, 张渝婕, 钟良, 段海涛, 王丹利, 牛丽娜, 王海涛, 刘玉斌, 杨翼. 基于低场核磁共振技术的烟草含水率检测方法[J]. 烟草科技, 2020 (8): 65-71.
ZHENG Songjin, ZHANG Yujie, ZHONG Liang, DUAN Haitao, WANG Danli, NIU Lina, WANG Haitao, LIU Yubin, YANG Yi. Quantifying tobacco moisture content based on low-field nuclear magnetic resonance[J]. Tobacco Science & Technology, 2020 (8): 65-71.

基于低场核磁共振技术的烟草含水率检测方法
郑松锦1, 张渝婕1, 钟良1, 段海涛1, 王丹利2, 牛丽娜1, 王海涛1, 刘玉斌1, 杨翼2
1. 河北中烟工业有限责任公司, 石家庄市维明南大街1号 050051;
2. 苏州纽迈分析仪器股份有限公司, 江苏省苏州市青花路98号3号 215151
摘要:
为准确、快速检测烟草加工过程中物料含水率,建立了基于低场核磁共振技术的烟草含水率测定方法,并与烘箱法含水率检测结果进行了对比,结果表明:①低场核磁共振法检测烟草含水率时,CPMG序列与FID序列相比较优,样品量7 g、扫描次数16次时测量结果较好。②所建立的基于低场核磁共振技术的烟草样品含水率检测方法具有较好的精密度和准确性,日内精密度和日间精密度结果的变异系数均小于2%。③与烘箱法相比,低场核磁共振法检测结果具有较好的稳定性和准确性,且检测时间(2 min)远低于烘箱法(150 min),适用于烟草含水率的快速、准确检测。
关键词:    低场核磁共振技术    烟草    含水率    烘箱法   
Quantifying tobacco moisture content based on low-field nuclear magnetic resonance
ZHENG Songjin1, ZHANG Yujie1, ZHONG Liang1, DUAN Haitao1, WANG Danli2, NIU Lina1, WANG Haitao1, LIU Yubin1, YANG Yi2
1. China Tobacco Hebei Industrial Co., Ltd., Shijiazhuang 050051, China;
2. Suzhou Neway Analytical Instrument Co., Ltd., Suzhou 215151, Jiangsu, China
Abstract:
In order to accurately determine the moisture content in tobacco during processing, a rapid method based on the CPMG signals of low-field nuclear magnetic resonance (LF-NMR) was established. The results were compared with those determined by the conventional oven moisture method. The results showed that:1) With the LF-NMR method, CPMG sequences were better than FID sequences, and the optimized sample volume and scanning numbers were 7 g and 16 respectively. 2) The established LF-NMR method featured good precision and high accuracy with the variation coefficients of intra- and inter-day precision less than 2%. 3) The LF-NMR method was more stable and accurate than the oven method, in addition the test time (2 min) was much shorter than that (150 min) of the oven method. The established method is suitable for the rapid and accurate determination of moisture content in tobacco.
Key words:    Low-field nuclear magnetic resonance technology    Tobacco    Moisture content    Oven method    
收稿日期: 2019-06-10     修回日期: 2020-05-03
DOI: 10.16135/j.issn1002-0861.2019.0236
基金项目: 中国烟草总公司标准项目“烟草及烟草制品水分测定核磁法”(2018QBZ03)。
通讯作者: 张渝婕,E-mail:fionazhangyj@163.com     Email:fionazhangyj@163.com
作者简介: 郑松锦(1983-),硕士,高级工程师,主要从事卷烟工艺技术研究。E-mail:zsj211@126.com
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