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Variability in determination of the single kernel moisture content of grain by means of TD-NMR spectroscopy

机译：变化测定单一内核谷物的含水率TD-NMR的手段光谱学

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摘要

Detailed information on the moisture distribution of grains is important to predict its storability, because there can be a significant variance in the moisture content among individual grain kernels. Hence, it is important to determine the single kernel moisture content. For it, the time domain nuclear magnetic resonance (TD-NMR) spectroscopy was applied and adopted for the non-destructive measurement at different types of grain with the focus on wheat. The TD-NMR is widely used in food industry to determine the moisture content precisely. The influence of the single kernel position in the measuring cell was examined more closely. As could be demonstrated, the particle moisture varied significantly depending on the angular position in the TD-NMR spectroscope. When the kernel was turned by 90 degrees, the moisture deviated by up to 0.9% wet basis, and this deviation increased as the grain water content increased. In addition, the experiments showed that the dry mass of the kernel has an impact on the received moisture content. Hence, the kernel should always have the same position in the NMR-spectroscope. Also the calibration should be carried out in this position and a wide range of kernel weight should be selected.
机译：水分分布的详细信息粮食是重要的预测它可存储性,因为可以有一个显著的方差在个体之间的水分含量谷物内核。确定单一内核含水率。时域核磁共振(TD-NMR)光谱应用和采用非破坏性测量在不同类型的谷物的着重点是小麦。TD-NMR广泛用于食品工业精确确定水分含量。单内核位置的影响测量细胞更加仔细的检查。可以证明,粒子的水分根据角之间存在着显著的差异在TD-NMR分光镜的地位。内核转了90度,湿度倾斜0.9%湿基,这偏差增加粮食水分含量增加了。内核的干燥质量有影响接收到的水分含量。应该有相同的位置吗NMR-spectroscope。在这个位置进行和广泛的粒重应该选中。

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