硒化玉米须多糖的工艺条件及硒含量测定研究

目的以玉米须多糖为原料,用亚硒酸钠进行玉米须多糖的硒化研究。方法利用单因素和正交试验确立硒化的最佳工艺条件;利用硒-硫氰酸钾-甲基紫萃取光度法测定硒多糖中的硒含量,并通过红外光谱对硒多糖进行了初步表征。结果最佳工艺条件为反应温度70℃,反应时间8 h,玉米须多糖与亚硒酸钠质量比为1∶1.2,硝酸体积分数为0.3%,玉米须硒多糖中硒含量为3.17 mg.g 1,平均收率为35.72%。红外光谱显示:玉米须硒多糖中含有Se=O键和Se C键。结论利用该工艺成功合成了玉米须硒多糖,为玉米须的开发和利用奠定基础。

Study on the Synthesis Processing and Content Determination of Corn Silk Polysaccharide Selenide

OBJECTIVE Using the polysaccharide from corn silk as the raw material, to study the selenizing process with sodium selenite. METHODS Selenizing conditions were established by single factor and orthogonal design; determining content of polysaccharide selenide by Se（IV）-KSCN-MV extraction spectrophotometry; characterizing the structure of polysaccharide selenide by IR. RESULTS The optimal conditions were： 70℃ reaction temperature, 8 hours reaction time, mass ratio of corn silk polysaccharide to sodium selenite 1 ： 1.2, 0.3% HNO3 of volume fraction. The average content of selenium in corn silk polysaccharide was over 3.17 mg·g-l and average yield was 35.72%. IR results showed that corn silk polysaccharide contained Se=O and Se-C. CONCLUSION Corn silk polysaccharide selenide is successfully synthesized and the study provides the foundation for further study and exploiting for corn silk.