Research On The Effect Of Drying Process On The Formation Of Salvia Miltiorrhiza Bge.f.alba

Objective: Drying in the shade of Salvia miltiorrhiza generally needs about 72 hours to reach a constant weight, it consumes long time and can not meet the demand of modern industrialization of Salvia miltiorrhiza. In this study, the problem of the quality decline and the low drying efficiency of Salvia miltiorrhiza in the processing of producing area after harvest was aimed, the changes of water soluble components and fat soluble components in Salvia miltiorrhiza were focused on the research in the variable temperature drying process,at the same time, the variation characteristics and trend of water content and changes of microstructure of Salvia miltiorrhiza in the different variable temperature drying technology of Salvia miltiorrhiza was discussed, all of the purposes were to analyze the effect of the drying process on the internal medicine water loss, microstructure of Salvia miltiorrhiza and quality of medicinal materials, elect optimum temperature parameter of Salvia mtiltiorrhiza dry system, the purpose of this study is to improve the drying efficiency on the basis of ensuring the quality of the medicinal materials, provide scientific basis for the efficient production processing of medicinal plants of our province, lay the foundation for the further processing and utilization of Salvia miltiorrhiza, provide the quality guarantee for the resources of Salvia miltiorrhiza at the same time.Methods: Through the research on the water content and effective components of Salvia miltiorrhiza with different root diameter and slice thickness, the best diameter and thickness of the experiment were optimized. Using Agilent HPLC to detect the active ingredients of Salvia miltiorrhiza with different levels of dry system; Using drying box to dry equivalent Salvia miltiorrhiza with variable temperature, through the change of the quality of Salvia miltiorrhiza, adoptting the Origin mapping software to analyze thevariation characteristics and trend of water content of Salvia miltiorrhiza in the variable temperature drying technology; Using JEM-100CX?transmission electron microscope to observe and analyze the section of Salvia miltiorrhiza which was sliced with double-edged bllade, dryed in different drying technology and sprayed with gold.Results: In the variable temperature drying technology, at the low temperature of30? and 40?, the moisture content declined slowly, the moisture content declined faster and the drying rate was promoted while the temperature was rised with the higher temperature stage of 60?, 70? and 80?. The shorter the drying time at the low temperature stage and the higher the temperature at the high temperature stage, the faster the drying process was done, it was not only improve the efficiency of the dry system, but also save energy and the prime cost; After the drying process, the microstructure of the Salvia miltiorrhiza became loose from tight, in the low temperature combined drying technology of 30?-60? and 30?-70?, the organizational structure of the root was clear,In each drying technology, the pipes in the wood fiber were arranged closely, after the temperature rose, the whole structure of the microstructure of Salvia miltiorrhiza became loose, cracks began to increase, and the pipes in xylem became scattered, orderly arrangement of the section appearance could improve the income of medicinal herbs; The highest total content of water soluble components in Salvia miltiorrhiza was increased by about one time compared with the fresh samples of Salvia miltiorrhiza in each drying technology, the content of total Tanshinones in fresh samples was higher than that of the dried ones, it was higher than that of the highest content in each drying technology by42.36%, 18.10%, 25.22%, 29.92%, 35.53% and 29.13%, respectively. At the end of the drying technology, the highest content of water soluble components and fat soluble components in Salvia miltiorrhiza were both appear in the drying technology of low temperature drying( 6 hours) combined with high temperature. In the drying technology of30?-6 h-70?, the content of water soluble components was higher than that of the highest content in other drying technology by 32.19%, 60.99%, 71.87%, 59.86% and52.54%, respectively, the content of fat soluble components was higher than that of the highest content in other drying technology by 10.19%, 12.31%, 15.57%, 21.70% and1.61%, respectively. High effective component content was the key to increase the efficiency of Salvia miltiorrhiza, and could also increase the income of the medicinal herbs.Conclusions: High temperature would not only accelerate the rate of loss of moisture content of medicinal materials, with the larger fluctuations of active ingredients, but also would change the microstructure of root, the water soluble components and the fat the soluble components of Salvia miltiorrhiza were both affected by the drying process, drying process could promote the increase of the content of water soluble components of Salvia miltiorrhiza and decrease the content of fat soluble components. The low temperature stage was the formation stage of active components of Salvia miltiorrhiza, and the high temperature stage was mainly the drying and the stable stage of the composition. The optimum drying technology was dried 6 hours at a low temperature of 30?and 3 hours at a high temperature of 70?. The method of variable temperature drying was not only improve the drying efficiency, but also ensure the quality of medicinal plants, save the energy and time, and guarantee the appearance characteristics of the drug, and improve drug income at the same time, this drying method would have good prospects for the industry.