Extracellular polysaccharide in culture medium of Nostoc flagelliforme cells was determined by phenol-sulfuric acid method and anthrone-sulfuric acid method in this paper.

• 采用苯酚-硫酸法及蒽酮-硫酸法测定发菜细胞培养液中水溶性多糖含量,分别对两种测定方法的稳定性、重复性、回收性及培养基中离子对测定结果的干扰程度进行比较。