Abstract:

In this study, ultrasonic is used to extract polysaccharides from different parts of Tamarix karelinii Bge..The effects of raw material to hot water ratio, soaking time in hot water, ultrasonic treatment time and power on extraction rates of polysaccharides from flowers, young leaves and stem of Tamarix karelinii Bge. were investigated. Based on the results of single factor test, orthogonal test was designed to optimize these factors. The results showed that the contents of polysaccharides in the extracts of flowers, young leaves and stem of Tamarix karelinii Bge. are 53.06, 164.90 mg/g and 48.01 mg/g, respectively when the raw materials of Tamarix karelinii Bge. were soaked in hot water at the proportion of 1:60 (W/V) for 1 hour and then extracted for 20 minutes at the ultrasonic power of 300 W. The average spike recovery in content determination of Tamarix karelinii Bge. polysaccharides is 98.25%.

Key words: Tamarix karelinii Bge., polysaccharide, ultrasonic-assisted extraction, extraction technology