The Basic Theories And Methods Of Process Analysis In The Nir Technology Research

Process analysis of Chinese material medica depends on the concept of "top-level design". Overall consideration and "top-level design" of process unit can ultimately assure that the product quality is stable, uniform, safe and effective. The objective of process analysis was to understand the whole procedure of Chinese material medica. Attributed to rapid, nondestructive, reliable and simple requirements, near infrared spectroscopy (NIR) has been widely used as one of the most important process analysis technologies for Chinese material medica. According to the key issues faced in this field, the thesis was to research the basic theory and methodology of process analysis of Chinese material medica by NIR.In the aspect of theory,â‘ introduce both typeâ… and typeâ…¡error and provide the theoretical formula of multivariate detection limits in the field of process analysis of Chinese material medica by NIR;â‘¡introduce total error theory and establish analytical methodology of process analysis of Chinese material medica by NIR, including accuracy, precision, limit of quantification, risk, linearity, and recovery;â‘¢research the NIR frequency absorption theory and assess the quantitative performance in each frequency spectral region.In the aspect of methodology,â‘ take Qingkailing injection intermediate, Lonicera japonica solution in ethanol precipitation process and Yihuang particles as examples and research multivariate detection limits estimates of NIR based on the methods of interval partial least squares, backward interval partial least squares and moving window partial least squares. The results show that multivariate detection limits estimate is higher in solid system than in aqueous solution. On the other hand, multivariate detection limits estimate is higher in aqueous solution than alcohol solution system. Multivariate detection limits estimate attach dozens of ppm in alcohol system;â‘¡take Qingkailing injection intermediate, Lonicera japonica solution in ethanol precipitation process and Yihuang particles as examples and establish NIR quantitative analysis method by accuracy profile (AP) in alcohol system, aqueous solution system and solid system of Chinese material medica;â‘¢take quantitative analysis parameters of AP method as criteria, illuminate the reliability of NIR model by sample sets with low APIs content in CHM. A promising model selection strategy for the determination of low-content anlytes ishighly recommended by AP;â‘£citric acid was used as solute, while water, ethanol and mixture of ethanol and water are used as solvent respectively. Taking quantitative analysis parameters of AP method as criteria, the result show that FCOT or CR region is preferred as a variables selection region, but if saturated absorption occurred in FCOT or CR region, SCOT region was a better choice. Technology,â‘ take Qingkailing injection as an example, themultivariate detection limits estimates of different types of NIR technologies (Holographic grating, Fourier transform, AOTF, MEMS) were investigated based on the methods of interval partial least squares, backward interval partial least squares and moving window partial least squares. The result show that multivariate detection limits estimates of novel type of NIR technologies attach ppm level, which will broad the use of NIR in the process analysis of Chinese material medica;â‘¡NIR quantitative analysis method was established by AP in different types of NIR instruments and different sampling methods.â‘¢NIR-CI served as a process analysis technology in the field of Chinese material medica. Take Rukuaixiao tablets as an example, the spatial component distribution was visualized using BACRA method. Furthermore, histogram analysis method was applied to assess the homogeneity of the tablets. Taking compound liquorice tablets as an example, standard deviation method (SDMT) was introduced to characterize the compound distribution of compound liquorice tablets based on binary image and MBMRSTDEV was introduced as a suitable approach to evaluate the homogeneity in blending process. Taking different origins of licorice as a carrier, a rapid and non-destructive quantitative analysis of glycyrrhizic acid content was carried out depended on linear model (PLS) and nonlinear model (LS-SVR) by NIR hyperspectral imaging. The result proved that hyperspectral data could be effectively employed, which paved the way for NIR hyperspectral imaging in the field of quantitative analysis of Chinese material medica.Application aspects,â‘ The pilot platform of process analysis for Qingkailing injection was established by on-line NIR;â‘¡integrate the advantages of pilot platform, theextraction process of Lonicera japonica was taken as an example and research the multivariate detection limits estimates of on-line NIR based on interval partial least squares were determined. Imply multivariate detection limits theory into the practical application and provide about 10 ppm level of multivariate detection limits estimate of on-line NIR;â‘¢establish on-line NIR quantitative analysis method.All in all, the thesis focusing on the basic theory, methodological research, technology promotion and application of process analysis of Chinese material medica, provides several key issues of NIR technology in strengthening the quality control in the process analysis of Chinese material medica.