基于低场核磁的稻谷储藏指标快速测定初探  

PRELIMINARY STUDY ON RAPID DETECTION METHOD FOR STORED RICE QUALITY BY LF NMR

作　　者：邵小龙 张蓝月[2] 殷灿[2] 宋伟[2,1] 

机构地区：[1]粮食储运国家工程实验室,210023 [2]南京财经大学食品科学与工程学院,210023

出　　处：《粮食储藏》2013年第6期29-32,共4页Grain Storage

基　　金：国家自然科学基金(31201443);江苏省高校自然科学基金(12KJB550004);"十二五"国家科技支撑计划(2011BAD03B02)

摘　　要：本研究用国标方法和低场核磁仪器分别检测3种储藏年份和2个品种籼稻的含水量、粗脂肪含量、直链淀粉、发芽率等理化指标和横向弛豫曲线,简单分析弛豫曲线的变化规律,并采用偏最小二乘法将理化指标和核磁数据进行关联.结果表明,稻谷的横向弛豫强度衰减速度很快,弛豫时间段0～300ms为区分稻谷样品的重要特征信号区域;回归模型结果初步表明使用低场核磁能够较好地预测稻谷储藏指标,如含水量、脂肪含量、直链淀粉和发芽率等.Physiochemical indexes and transverse relaxation curves of indica paddy rice （three storage years and two varieties） were measured by GB methods and low field nuclear magnetic resonance （LF NMR）, re- spectively. Exploratory comparative analysis and partial least squares （PLS） were employed to these data. Paddy rice samples was with short transverse relaxation time （0--300ms）, which was important single re- gion for rice samples discrimination. The preliminary results showed that moisture content, fat content, amylose starch and germination rate o{ the sample can also be predicted accurately by LF NMR.

关 键 词：稻谷储藏 低场核磁 偏最小二乘法 快速检测 

分 类 号：S511[农业科学—作物学] S379