抗坏血酸的毛细管电泳-柱端铁氰化镍修饰镍微电极电化学检测  

Determination of Ascorbic Acid by Capillary Electrophoresis with End-Column Amperometric Detection at Hexacyanoferrate Modified Nickle Electrode

作　　者：许青[1] 麦有祥 张金中[3] 魏培海[1] 

机构地区：[1]山东教育学院生化系,山东济南250013 [2]山东景芝有限公司热电厂,山东安丘262119 [3]桓台县唐山中学,山东淄博256400

出　　处：《山东教育学院学报》2005年第3期80-82,共3页Journal of Shandong Education Institute

摘　　要：以K3Fe(CN)6溶液为电解液,在电沉积Ni表面形成铁氰化镍膜,制得了铁氰化镍修饰Ni电极,研究了修饰电极的电化学性质及其对抗坏血酸的电催化氧化作用.该修饰电极用于抗坏血酸的毛细管电泳-电化学检测,检测的线性浓度范围为2.0×10-6～5.0×10-3mol·L-1,检测限为5.0×10-7mol·L-1.A nickel hexacyanoferrate modified nickel electrode was fabricated by electrodepositing hexacyanoferrate on the surface of newly deposited nickel film in aqueous electrolytes containing potassium ferricyanide.The electrochemical properties of the electrode and its catalysis for the electrochemical oxidation of ascorbic acid were studied.The electrode can be used as the electrochemical detector for the determination of ascorbic acid by capillary eletrophoresis with electrochemical.The peak current is linear with the concentration of nitrite over 1.0×10-6～5.0×10-6mol·L-310.0 and the detection limit is 5.0×10-7mol·L-1.

关 键 词：抗坏血酸 毛细管电泳 铁氰化镍 修饰电极 

分 类 号：O652[理学—分析化学]