κ-卡拉胶脱色方法的研究

Study on decolorization of κ-carrageenan

采用次氯酸钠、过氧化氢、活性碳和大孔树脂D113-Ⅲ、D201和D303对麒麟菜κ-卡拉胶进行脱色研究。比较κ-卡拉胶脱色率、多糖保留率和凝胶强度。结果表明,次氯酸钠和过氧化氢脱色后,多糖保留率和凝胶强度较低;大孔树脂D201和D113-Ⅲ多糖脱色率很低;活性炭脱色效果较好,但脱色后多糖溶液中残留的活性炭难以清除,对多糖品质有一定影响;大孔树脂D303的脱色效果较好,脱色率达到90.73%,多糖保留率85.76%,凝胶强度1103.7g/cm2。

Four methods（sodium hypochlorite,hydrogen peroxide,activated carbon and macroporous resins D113-Ⅲ,D201 and D303）were separately used for the decolorization of κ-carrageen extract from Eucheuma cottonii.In terms of decolorization efficiency,retention rate of polysaccharide and gelling strength,the results showed that decolorization using sodium hypochlorite or hydrogen peroxide led to low retention rate of polysaccharide and gelling strength,the decolorization efficiencies by macroporous resins D113-Ⅲ and D201 were low,the activated carbon had the better decolorization effect with the disadvantage of carbon residue in polysaccharide solution and no good polysaccharide quality,and that the decolorization efficiency by macroporous resins D303 was 90.73%,retention rate of polysaccharide was 85.76% and gelling strength was 1103.7g/cm2,reprepresenting good decolorizing ability.