A simple method for fabrication of sole composition nickel hexacyanoferrate modified electrode and its application.
Nickel hexacyanoferrate film modified gold electrode was prepared by a simple chemical deposition procedure from a fresh prepared solution containing ferricyanide, Ni(2+), and sodium nitrate. The resultant films have solo composition and are significantly stable as compared to the electrochemically deposited NiHCF films. For different concentrations of Na(+) in the solution, the formal potential values of NiHCF shift according to the Nernstian behavior with a slope of 48 mV in the range of 10(-4) to 1.0M. The NiHCF film was also used for the electrocatalytic oxidation of ascorbic acid. The anodic peak current observed in cyclic voltammetry increased with the ascorbic acid concentration. At a fixed potential under hydrodynamic conditions, the calibration plot was linear over the ascorbic acid concentration range 0.1-12 mM.
Chen
Wei
W
Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, China.
Tang
Jian
J
Cheng
Han-Jun
HJ
Xia
Xing-Hua
XH
D001205:Ascorbic Acid / Q000032:analysis / Q000737:chemistry; D015374:Biosensing Techniques; D002384:Catalysis; D004563:Electrochemistry / Q000295:instrumentation* / Q000379:methods*; D004566:Electrodes; D005292:Ferricyanides / Q000737:chemistry*; D006801:Humans; D009532:Nickel / Q000737:chemistry*; D004364:Pharmaceutical Preparations / Q000032:analysis / Q000737:chemistry; D015203:Reproducibility of Results; D012964:Sodium / Q000097:blood / Q000737:chemistry / Q000652:urine
D005292:Ferricyanides; D004364:Pharmaceutical Preparations; C007931:hexacyanoferrate III; D009532:Nickel; D012964:Sodium; D001205:Ascorbic Acid