Research of regularity on the quality change of different specifications of Niuxi during storage based on color-component correlation analysis
Objective:To quantitatively analyze the chemical composition and chromaticity of Niuxi with different stro-age,packing and specifications,and to clarify the correlation and change rule of the chromaticity and composition of Niuxi during processing.Methods:The colorimaticity value and index component contents of β-ecdysterone,25R-oxanosterone,25S-oxanosterone and oleanolic acid of Niuxi were measured by ultraviolet spectrophotometer and high performance liquid chromatography(HPLC)under different storage and packaging conditions,and the correlation between the chromaticity value and index component was analyzed by gray correlation analysis.Results:From the comprehensive consideration of the water content of the decoction pieces,low-temperature vacuum packaging was preferred;considering the content of ste-roid components,low-temperature vacuum packing was preferred;considering the content of oleanolic acid components,high-temperature nitrogen package was better;from the appearance and chroma value of the decoction pieces,it was pre-ferred to store in a low-temperature environment.Grey correlation analysis showed that the water content of decoction pieces was most closely related to its chroma value,followed by β-ecdysterone.Conclusion:The influence of storage temperature on the chemical composition of Niuxi is great,while the correlation between water content and chroma is the closest.The chroma value can provide reference for the identification of storage degree and the prediction of component content of Niuxi.The best storage condition for Niuxi decoction pieces is low-temperature vacuum packaging.
万方数据
维普
