近红外漫反射光谱法快速测定注射用丹参多酚酸中的水分

Rapid Determination of Moisture Content in Danshen Polyphenols Acid Injection with Near-infrared Diffused Reflection Spectroscopy

目的:利用近红外漫反射光谱分析技术对注射用丹参多酚酸中的水分进行无损、快速的定量分析。方法:以注射用丹参多酚酸为分析对象,用光纤测定近红外漫反射光谱,采用偏最小二乘法(PLS)建立定量校正模型。结果:53份样品的原始光谱经二阶导数预处理,选取11 993.1～6 098.8 cm-1和5 450.7～4 598.2 cm-1谱段,建立注射用丹参多酚酸(冻干)水分定量校正模型并分析,结果R2为0.991 1,内部交叉验证均方差(RMSECV)为0.210,最佳维数为4。10份样品用于外部验证,预测误差均方差(RMSEP)为0.243。结论:该方法分析快速、简便,结果准确可靠,可实现大批量样品的快速测定,对中药制剂的质量分析有一定的参考价值。

Objective：A near-infrared（NIR） quantitative method was developed for rapid and nondestructive determination of moisture content in Danshen polyphenols acid injection.Method：The diffuse reflectance near-infrared spectra of Danshen polyphenols injection were measured intact by a fiber optic probe.The quantitative calibration model was developed using partial least squares（PLS） algorithm.Result：Using 53 samples Near-infrared spectra were pretreated with the second Derivative.The wavebands containing 11 993.1-6 098.8 cm-1 and 5 450.7-4 598.2 cm-1were selected,established and the quantitative calibration model of moisture content in Danshen polyphenols injection was established.The results shows that R2was 0.991 1,root mean square errors of Cross-Validation（RMSECV） was 0.210 and the best dimension was 4.10 samples as validation set,the RMSEP was 0.243.Conclusion：The presented method is timesaving,convenient and accuracy,which could be applied for rapidly determining moisture content in large numbers of samples.It is valuables for us to research the quality of traditional Chinese medical preparations.