离子选择电极测定维生素C生产过程中钠含量  

Determination of Sodium in Vitamin C with Ion Selective Electrode During Its Production Process

作　　者：杜明辉[1] 高振国[2] 陈星[2] 刁建志[2] 

机构地区：[1]石家庄铁道大学教务处,石家庄050043 [2]石家庄铁道大学材料科学与工程学院,石家庄050043

出　　处：《理化检验（化学分册）》2012年第1期56-57,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：河北省教育厅自然科学基金项目(733007)

摘　　要：采用钠离子选择电极测定维生素C(VC)生产过程中钠的含量。试验表明:该离子选择性电极对钠具有良好的选择性和电位响应特性。在pH≥10介质中,电极电位呈现能斯特响应,线性范围为1.0～10.0mg.L-1,斜率为55.18mV.pc-1。将该电极用于测定维生素C生产过程中的钠含量,测得方法的回收率在85.4%～99.0%之间,相对标准偏差(n=6)在1.3%～1.4%之间。Sodium ion selective electrode was used in the determination of Na＋ in Vitamin C（VC）.It was found that excellent selectivity and potential response toward Na＋ were achieved by the ion selective electrode,which showed Nernst potential response in the range of 1.0-10.0 mg·L-1 with slop of 55.18 mV·pc-1 in a medium of pH≥10.Recovery was tested by standard addition method on the base of samples taken during production process of Vitamin C,results of recovery found were in the range of 85.4%-99.0% with RSD（n=6） in the range of 1.3%-1.4%.

关 键 词：钠 离子选择电极 VC生产过程 

分 类 号：O657.31[理学—分析化学]