Purification of polysaccharide from Solanum nigrum L. by S-8 macroporous resin adsorption

To study the purification conditions of polysaccharide from Solanum nigrum L. by S-8 macroporous adsorption resin. The effect of multi-factors on the purification of polysaccharide from Solanum nigrum were studied by static - dynamic adsorption and desorption methods with indexes of adsorption and desorption rates. The optimized purification process condition was as follows: the concentration of sample was 5 mg/mL, pH level was 7.0, temperature was 30 degrees C, the adsorption velocity was 0.5 mL/min, the maximun loading amount was 10 BV, 0.5 mol/L NaCl solution 5BV was used as eluent, elution flow rate was 4 mL/min. With this condition, the purity of Solanum nigrum polysaccharide was 91.00%, which was 1.989 times higher than before. S-8 macroporous resin can be used to separate and purify the solanum nigrum polysaccharide and improve the purity and quality of polysaccharides.