Electrocatalytic determination of L-ascorbic acid by modified glassy carbon with Ni(Me2(CH3CO)2[14]tetraenoN4) complex.
A novel modified glassy carbon electrode containing Ni(Me2(CH3CO)2[14]tetraenoN4) complex was used as an electrocatalytic sensor for the determination of L-ascorbic acid in pH = 6.6. The peak potential shifted to negative by 205 mV compared with that for a bare electrode in cyclic voltammograms. The calibration curve was linear up to 6.2 x 10(-3) M with a detection limit 3.1 x 10(-7) M and an RSD% better than 2.47%. This newly modified electrode was applied to commercial pharmaceutical tablets, injections and foods. The obtained results were identical to those obtained by the classical 2,6-dichlorophenolindophenol method.
Khorasani-Motlagh
Mozhgan
M
Inorganic Research Laboratory, Department of Chemistry, Sistan & Baluchestan University, PO Box 98165-181, Zahedan, Iran. mkhorasani@hamoon.usb.ac.ir
Noroozifar
Meissam
M
D001205:Ascorbic Acid / Q000032:analysis*; D002244:Carbon; D002384:Catalysis; D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods; D004566:Electrodes / Q000592:standards*; D009532:Nickel; D009942:Organometallic Compounds
D009942:Organometallic Compounds; D002244:Carbon; D009532:Nickel; D001205:Ascorbic Acid