流动注射共振光散射法测定维生素C  

Determination of Vitamin C by Flow Injection Resonance Light Scattering Method

作　　者：衷明华[1] 李云[2] 

机构地区：[1]韩山师范学院化学系,广东省潮州市桥东521041 [2]韩山师范学院生物系,广东省潮州市桥东521041

出　　处：《光谱实验室》2011年第1期101-104,共4页Chinese Journal of Spectroscopy Laboratory

基　　金：广东省科技厅科技计划项目(2006B37001004)

摘　　要：建立了测定维生素C的流动注射共振光散射分析新方法。在弱酸介质中,利用维生素C将Cu2+还原成Cu+,Cu+进一步与SCN-生成CuSCN沉淀颗粒,用流动注射共振光散射法间接测定维生素C。测定的维生素C线性范围为1.0—120.0mg/L,检出限为0.84mg/L。所建立的分析方法简便、所用试剂少、线性范围宽,可用于饮料中维生素C的测定。A novel flow injection method with light scattering was developed for the determination of vitamin C.In a weak acid medium,vitamin C can be used to reduce Cu2＋ to Cu＋,then Cu＋ combines with SCN-to form CuSCN precipitate.A flow injection light scattering method was used to indirect determine VC.The linear range of determination was 1.0—120.0mg/L,and the detection limit was 0.84mg/L.The method is simple,less reagent comsuming and has a wide linear range.It can be applicable to the determination of vitamin C in beverages.

关 键 词：维生素C 流动注射 共振光散射 

分 类 号：O657.32[理学—分析化学]