近红外光谱法测定不同产地独活中蛇床子素和二氢欧山芹醇当归酸酯含量

应用近红外光谱技术建立对独活中蛇床子素和二氢欧山芹醇当归酸酯的快速检测方法。自不同产地采集97批样品，通过高效液相色谱法测定指标成分含量，并测定样品的近红外光谱图，由于光谱图间差异较小，需要进行光谱预处理，通过比较不同预处理方法的结果，选择最优模型参数，结合偏最小二乘法分别建立独活中蛇床子素和二氢欧山芹醇当归酸酯的定量分析模型。结果显示，预处理方法为一阶导数时，蛇床子素的模型处于最优化性能，模型的相关系数为0.941 3，RMSEP值为0.141；校正集相关系数为0.923 3，RMSEC值为0.163。不经预处理的二氢欧山芹醇当归酸酯模型处于最优化性能，模型的相关系数为0.857 4，RMSEP值为0.103；校正集相关系数为0.831 5，RMSEC值为0.112。研究表明，近红外光谱技术结合偏最小二乘法操作简便，测定方法快速、高效、无损，可以实现对独活中蛇床子素和二氢欧山芹醇当归酸酯的含量进行定量分析，为中药材的质量控制研究和含量测定提供了一种科学有效的方法，同时为近红外光谱技术发展中药实时分析开辟了一个新方法，对保证中药材质量稳定可控有重要意义。

Determination of Osthole and Columbianadin in Angelicae Pubescentis Radix with Near Infrared Spectroscopy

Near infrared spectroscop is applied to establis h a rapid detection method of osthole and columbianadin in Angelicae pubescentis Radix.Near infrared spectroscopy (NIR) has become a new analytical technique f or quantitative analysis of Chinese medicinal materials because of its rapid ana lysis speed and no need for sample pretreatment.97 batches of samples are colle cted from different regions with the determination of samples with high performa nce liquid chromatography (HPLC) and NIR.Due to subtle difference between the s pectra,it needs to preprocess by comparing the results of different pretreatmen t methods to select the optimal model parameters.The results showed that the pr etreatment method for the first derivative,osthole in performance optimization model,the determination coefficients was 0.941 3 while the root mean square pr ediction (RMSEP) was 0.141;determination coefficients of calibration set was 0.923 3,and the root mean square error of calibration (RMSEC) was 0.163.Witho ut pretreatment of columbianadin model in optimal performance,the determination coefficients was 0.857 4 and the root mean square prediction was 0.103;when the determination coefficients of calibration set was 0.831 5,and the root mea n square error of calibration was 0.112.Studies have shown that the near infra red spectroscopy combined with partial least squares method is simple,rapid,ef ficient and nondestructive which can achieve the goal in terms of quantitative analysis for quality control of medicines research with osthole and columbianadi n in Angelicae Pubescentis Radix.At the same time a new method for the develop ment of near infrared spectroscopy technology of traditional real-time analysis is proposed,it also has great significance to guarantee the stability of Chine se medicinal materials quality control.