Electrochemical Determination of Dopamine in the Presence of High Concentrations of Ascorbic Acid at a Poly(Indole-3-acetic Acid) Coated Electrode

1997 ◽  
Vol 30 (9) ◽  
pp. 1643-1652 ◽  
Author(s):  
Ai-Min Yu ◽  
Deng-Ming Sun a ◽  
Hong-Yuan Chen
Keyword(s):  
Ascorbic Acid ◽  
Acetic Acid ◽  
Electrochemical Determination ◽  
Coated Electrode ◽  
High Concentrations ◽  
Indole 3 Acetic Acid

scholarly journals Electrochemical determination of ascorbic acid at p-phenylenediamine film-holes modified glassy carbon electrode

2015 ◽  
Vol 80 (9) ◽  
pp. 1161-1175 ◽  
Author(s):  
Bikila Olana ◽  
Shimeles Kitte ◽  
Tesfaye Soreta
Keyword(s):  
Ascorbic Acid ◽  
Detection Limit ◽  
Glassy Carbon Electrode ◽  
Modified Electrode ◽  
Glassy Carbon ◽  
Linear Response ◽  
Modified Electrodes ◽  
Electrochemical Determination ◽  
Carbon Electrode

In this work the determination of ascorbic acid (AA) at glassy carbon electrode (GCE) modified with a perforated film produced by reduction of diazonium generated in situ from p-phenylenediamine (PD) is reported. Holes were intentionally created in the modifier film by stripping a pre-deposited gold nanoparticles. The modified electrodes were electrochemically characterized by common redox probes: hydroquinone, ferrocyanide and hexamineruthenium(III). The cyclic voltammetric and amperometric response of AA using the modified electrodes was compared with that of bare GCE. The bare GCE showed a linear response to AA in the concentration range of 5 mM to 45 mM with detection limit of 1.656 mM and the modified GCE showed a linear response to AA in the concentration range of 5 ?M to 45 ?M with detection limit of 0.123 ?M. The effect of potential intereferents on amperometric signal of AA at the modified GCE was examined and found to be minimal. The inter-electrode reproducibility, stability, and accuracy were determined. The modified electrode showed excellent inter-electrode reproducibility, accuracy and stability. The modified electrode reported is a promising candidate for use in electroanalysis of AA.

Determination of indole-3-acetic acid in plant tissues by capillary electrophoresis

1997 ◽  
Vol 779 (1-2) ◽  
pp. 342-346 ◽  
Author(s):  
M. Brüns ◽  
A. Bazzanella ◽  
H. Lochmann ◽  
K. Bächmann ◽  
C. Ullrich-Eberius
Keyword(s):  
Acetic Acid ◽  
Capillary Electrophoresis ◽  
Plant Tissues ◽  
Indole 3 Acetic Acid

Defects regulating of graphene ink for electrochemical determination of ascorbic acid, dopamine and uric acid

Talanta ◽  
2018 ◽  
Vol 180 ◽  
pp. 248-253 ◽  
Author(s):  
Li Fu ◽  
Aiwu Wang ◽  
Guosong Lai ◽  
Weitao Su ◽  
François Malherbe ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Electrochemical Determination

Determination of Plant Hormone Indole-3-Acetic Acid in Aqueous Solution

2012 ◽  
Vol 25 (1) ◽  
pp. 303-307 ◽  
Author(s):  
Jana Bulíčková ◽  
Romana Sokolová ◽  
Stefania Giannarelli ◽  
Beatrice Muscatello
Keyword(s):  
Aqueous Solution ◽  
Acetic Acid ◽  
Plant Hormone ◽  
Indole 3 Acetic Acid
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