测定蔬菜中还原型维生素C两种方法的比较  

Determining the Content of Reduced Vitamin C in Vegetables by Two Methods

作　　者：肖彦春[1] 雷恩春[1] 关秀杰[1] 管晓琳[1] 

机构地区：[1]辽宁农业职业技术学院农产品质量安全检测中心,辽宁营口115009

出　　处：《湖北农业科学》2011年第5期1035-1037,共3页Hubei Agricultural Sciences

摘　　要：采用钼蓝比色法和2,6-二氯靛酚滴定法测定蔬菜中还原型维生素C含量。结果表明,钼蓝比色法测定蔬菜中还原型维生素C含量,其相对标准差在0.87%～2.59%,回收率在97.20%～103.20%;2,6-二氯靛酚滴定法相对标准差在1.37%～6.07%,回收率在91.20%～103.70%。钼蓝比色法的准确度及精确度均高于2,6-二氯靛酚滴定法,且操作简便、快速,不受样液颜色的影响。Molybdenum blue method and 2,6-dichloro-indophenol titration method was applied to detect vitamin C in vegetable.The result showed that RSD（relative standard deviation） of 0.87%～2.59%,recoveries of 97.20%~103.20% were obtained by molybdenum blue method.RSD of 1.37%～6.07%,recoveries of 91.20%～103.70% were obtained by 2,6-dichloro-indophenol titration method.The molybdenum blue method was easy to operate and quick,and with higher accurate degree and precision than 2,6-dichloro-indophenol titration method.Especially,this method would not be affected by the color of sample solution.

关 键 词：还原型维生素C 钼蓝比色法 2 6-二氯靛酚滴定法 

分 类 号：TQ466.3[化学工程—制药化工] O655[理学—分析化学]