丹参提取物中辅料糊精的近红外快速定量分析

摘要

目的：建立准确、快速、操作简便的中药丹参提取物混合粉末中辅料糊精含量的近红外（ NIR）快速测定方法。方法：采集已知糊精含量样品的近红外光谱，通过偏最小二乘回归方法建立定量模型。结果：所建NIR定量模型预测效果良好（预测集rval＝0.9871，RMSEP＝1.085％）。结论：近红外光谱分析可作为丹参提取物中糊精含量的快速测定方法，测定结果准确。%Objective:To establish a convenient and effective near -infrared spectrometry ( NIR) analytical method aimed at the determi-nation of dextrin in Salvia extract powder.Methods:Collected the near -infrared spectroscopies of samples containing dextrin of default concentrations and established quantitative models by PLS ( partial least squares method ).Results:The PLS quantitative model has a good prediction performance(rval =0.9871,RMSEP =1.085%).Conclusion:Near infrared spectroscopy can be used as a rapid determina-tion method of the concentration of dextrin in Salvia extract power and the uncertainty of the method can be accepted .