Analysis of Ascorbic Acid by Electrochemical Detection
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PEI, L., WEI, T., LIN, N., CAI, Z.. Analysis of Ascorbic Acid by Electrochemical Detection . In: Электронная обработка материалов, 2016, nr. 4(52), pp. 85-89. ISSN 0013-5739.
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Электронная обработка материалов
Numărul 4(52) / 2016 / ISSN 0013-5739 /ISSNe 2345-1718

Analysis of Ascorbic Acid by Electrochemical Detection
CZU: 543.257

Pag. 85-89

Pei L., Wei T., Lin N., Cai Z.
 
Anhui University of Technology, Ma’anshan
 
Proiecte:
 
Disponibil în IBN: 13 noiembrie 2016


Rezumat

A glassy carbon electrode (GCE) modified by copper-doped titanium dioxide nanoneedles has been fabricated and used for the electrochemical detection of ascorbic acid (AA) in KCl solution. Two pairs of peak currents on quasi-reversible electrochemical cyclic voltammogram peaks (cvps) are located at 0.16 V, -0.03 V (cvp 1 and cvp 2) and 0.01 V, -0.44 V (cvp 1′ and cvp 2′), respectively. The relationship between the peak current and AA concentration is linear in the concentration range from 0.0005 to 2 mM. There is also a linear relationship between the peak current and the scan rate. The detection limit is 0.37 μM and 0.25 μM for cvp 1 and cvp 2, respectively, at a signal-to-noise ratio of 3. A GCE modified by copper-doped titanium dioxide nanoneedles exhibts good stability and has promising characteristics for the detection of AA.

Cuvinte-cheie
ascorbic acid,

copper-doped titanium dioxide nanoneedles, electrochemical detection, glassy carbon electrode