目的 利用近红外光谱技术快速测定何首乌中水分的含量. 方法 烘干法测定样品中水分含量,获得含量数据信息,近红外光谱仪采集样品的近红外光谱数据. 采用化学计量学方法建立何首乌药材中水分含量测定的近红外光谱分析模型,验证集样品对模型进行验证,获得何首乌近红外光谱水分含量测定模型. 结果 所建模型的内部交叉验证决定系数为0.984 75,校正均方差为0.161,预测均方差为0.181,内部交叉验证均方差为0.471 64. 21批验证集的参考值与预测值的绝对偏差在-0.35%~0.28%,平均回收率为99.87%. 结论 近红外光谱技术可快速、准确地测定何首乌中的水分含量.%Objective To determine the moisture content in Polygoni multiflori Radix rapidly by near-infrared spectroscopy. Methods The moisture content of the samples were determined by oven drying method and the near-infrared spectrum data were collected by near-infrared spectroscopy.The quantitative test model of moisture content in Polygoni multiflori Radix was established by chemometrics methods and was validated with validation samples. Results The correlation coefficients, root-mean-square error of calibration (RMSEC), root-mean-square error of predication (RMSCP) and the root-mean-square error of cross-validation ( RMSECV ) of the calibration model was 0. 984 75, 0. 161, 0. 181 and 0. 471 64, respectively.The absolute deviation of the analytical and predictive values of 21 validation samples was -0.35%-0.28%, and the average recovery was 99. 87%. Conclusion Near-infrared spectroscopy can be used to determine the moisture content of Polygoni multiflori Radix rapidly and accurately.
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