Synthesis and Characterization of Seleno-Lilium davidii var. Unicolor Salisb Polysaccharides

Abstract

Lilium davidii var. unicolor Salisb polysaccharides (LP) were extracted from Lilium davidii var. unicolor Salisb by distilled water, precipitated with ethanol. Seleno-LP were prepared by employing sodiumselenite to modify the Lilium davidii var. unicolor Salisb polysaccharides under the catalysis of nitric acid-barium chloride. The favor reaction conditions were at 80 ºC for 14 h in the 0.8 % (v/v) nitric acid. The selenic content of seleno-polysaccharide determined by ICP- AES was 3.561 mg/g. The structural and the binding energy of oxygen differences between polysaccharide and seleno-polysaccharide were examined by FT-IR and XPS, respectively. The title products were characterized by differential thermal analysis (DTA) and thermogravimetric analysis (TG).