目的利用近红外漫反射光谱技术和偏最小二乘法测定牛膝中蜕皮甾酮。方法近红外漫反射光谱技术和偏最小二乘法。结果所建立预测方程样品的预测值和真实值之间的相关系数为0.9489,该法的建立证明了近红外漫反射光谱技术应用于中药中化学成分的测定的可行性。结论同其他测定方法相比该法操作简单、速度快、效率高、无污染、费用低、无需复杂的前处理,可以直接对大量未知样品进行测定。

Objective To determine ecdysterone content in Radix Achyranthis Bidentalae by near-infrared diffuse reflectance spectroscopy (NIRDRS) combined with partial least squares (PLS). Methods NIRDRS and PLS. Results The correlation coefficient of the quantitative mathematics model between the prediction and the true values was 0.948 9. It is feasible to appling the above established method to determination of chemical constituents in Chinese materia medica. Conclusion Compared with other Methods, the method is simple, rapid, high efficient, low expenditure, no pollution and with preparation undone and is suit for large quantity of unknown samples.