Comparative Study on Extracting Radix hedysari Polysaccharide by Microwave-Ultrasonic Method and Conventional Method

The objective of the research was to compare the difference between conventional method and microwave-ultrasonic method in extracting Radix hedysari polysaccharide.With medicinal material R.hedysari as tested materials,the conventional method and microwave-ultrasonic method were used to extract R.hedysari polysaccharide to determine polysaccharide content by phenol-vitriolic colorimetry and compare the difference of 2 kinds of extraction methods.The contents of polysaccharides obtained from 2 kinds of extraction methods had great difference.The content of polysaccharides from conventional method was 4.19% and that from microwave-ultrasonic method was 8.98%.Microwave-ultrasonic method had such greater advantages on extracting R.hedysari polysaccharide as that the extraction time was shortened greatly,which could avoid the decomposition of R.hedysari polysaccharide and the instruments were sample and convenient in operation.The efficiency of extracting components of traditional Chinese medicine by microwave-ultrasonic method was higher than that by conventional extraction method.