摘要
建立了基于核磁共振硬脉冲自由感应衰减信号(FID)的含水率测定方法。以烟丝样品为模型,在预先建立的工作函数基础上,可对多个样品水分进行快速测定。以核磁共振法与烘箱法的结果进行比较,结果显示核磁共振法具有理想的重复性、精密度和稳定性,5次平行测定结果的标准偏差小于0.5%,4天内测得的样品含水率极差为0.45%。
A novel method for detecting moisture content in cut tobacco based on free induction decay （FID） signals by low-field nuclear magnetic resonance（NMR） was established. The method was validated by measuring moisture content in cut-tobacco samples. Comparison between NMR method and Oven-drying method showed that the former had good repeatability, accuracy and stability with RSDs of 5 parallel tests lower than 0.5%and sample range of moisture within 4 days being 0.45%.
出处
《中国烟草学报》
EI
CAS
CSCD
北大核心
2014年第5期6-11,共6页
Acta Tabacaria Sinica
基金
国家烟草专卖局资助项目'浓香型特色优质烟叶开发重大项目'(110201101001【TS-01】)
上海市博士后科研资助计划'打叶复烤对烟叶香味物质的影响研究'(14R21422900)
关键词
低场
核磁共振
烟丝
含水率
FID信号
low-field
nuclear magnetic resonance（NMR）
cut-tobacco
moisture content
FID signal
