Abstract In this study, we aimed to establish a novel method for determining moisture and lipid contents in oats using low-field nuclear magnetic resonance (LF-NMR). The applicabilities of the internal and external standard methods for determining oat moisture were compared. To determine oat lipids, calibration curves were established using the external standard method, and then the LF-NMR method and the conventional method were compared. The independent peaks of T21 (0.01–3.0 ms) and T22 (9.01–410.27 ms) in the T2 spectral curves of oat flour represented water and lipid, respectively. Analysis of moisture content with the internal standard method was more accurate than with the external standard method, which uses 3 % MnCl2•4H2O as a standard. The area of T21 peak and T22 peak has a good linear correlation with the mass of water weight and lipid weight, respectively. The results of the LF-NMR method were consistent with the results of the oven method (for moisture content) and the Bligh method (for total lipid content). Moreover, the endosperm was found to contain 0.58–1.36 % of the bound lipid, which was slightly lower than the value for the oat bran.

中文翻译：

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使用低场核磁共振测定燕麦中的水分、总脂质和结合脂质含量

摘要 在本研究中，我们旨在建立一种使用低场核磁共振 (LF-NMR) 测定燕麦中水分和脂质含量的新方法。比较了测定燕麦水分的内标法和外标法的适用性。为测定燕麦脂类，采用外标法建立校准曲线，然后将LF-NMR法与常规方法进行比较。燕麦粉 T2 光谱曲线中 T21 (0.01–3.0 ms) 和 T22 (9.01–410.27 ms) 的独立峰分别代表水和脂质。内标法分析水分含量比外标法更准确，外标法以3% MnCl2•4H2O为标准。T21峰和T22峰的面积分别与水质量和脂质质量具有良好的线性相关性。LF-NMR方法的结果与烘箱法（水分含量）和Bligh方法（总脂质含量）的结果一致。此外，发现胚乳含有 0.58-1.36% 的结合脂质，略低于燕麦麸的值。