Abstract:

Structural characterization and physio-chemical properties of 6 long jujube polysaccharides were explored by
infrared spectroscopy, optical rotation meter and viscometer. Infrared spectroscopy showed that long jujube polysaccharide
had typical functional groups of polysaccharides. Optical rotation tests revealed the specific rotation degrees for 6 long
jujube polysaccharides of +44.0, +27.0, +30.0, +19.0, +36.0 and +22.0, respectively. Their solubility was greatly affected
by temperature. A low solubility at low temperature was observed. The viscosity of six long jujube polysaccharides was
increased with increasing concentration, but was reduced with increasing temperature and the temperature effect was
reversible. Moreover, the viscosity was also negatively related to shearing force.

Key words: polysaccharide, optical rotation, viscosity, solubility