scholarly journals Direct Electrochemistry of Hemoglobin on Electrodeposited Three-Dimensional Interconnected Graphene-Silver Nanocomposite Modified Electrode

2016 ◽  
pp. 9656-9665 ◽  
Author(s):  
Hailiang Sha ◽  
Keyword(s):  
Modified Electrode ◽  
Direct Electrochemistry ◽  
Three Dimensional ◽  
Silver Nanocomposite

Direct electrochemistry and electrocatalysis of nitrite based on nano-alumina-modified electrode

2009 ◽  
Vol 14 (6) ◽  
pp. 1057-1064 ◽  
Author(s):  
Qiong He ◽  
Tian Gan ◽  
Dongyun Zheng ◽  
ShengShui Hu
Keyword(s):  
Modified Electrode ◽  
Direct Electrochemistry ◽  
Nano Alumina

scholarly journals Electro-Oxidation and Simultaneous Determination of Indole-3-Acetic Acid and Salicylic Acid on Graphene Hydrogel Modified Electrode

Sensors ◽  
2019 ◽  
Vol 19 (24) ◽  
pp. 5483 ◽  
Author(s):  
Xiaodong Cao ◽  
Xueting Zhu ◽  
Shudong He ◽  
Xuan Xu ◽  
Yongkang Ye
Keyword(s):  
Acetic Acid ◽  
Salicylic Acid ◽  
Modified Electrode ◽  
Limit Of Detection ◽  
Simultaneous Detection ◽  
Three Dimensional ◽  
Linear Sweep Voltammetry ◽  
Oxidation Reactions ◽  
Sensor Performance ◽  
Indole 3 Acetic Acid

A selective and sensitive electrochemical sensor was developed for simultaneous detection of phytohormones indole-3-acetic acid (IAA) and salicylic acid (SA). The sensing interface was fabricated on a porous, three-dimensional networked graphene hydrogel (GH) modified glassy carbon electrode (GCE). The electrocatalytic behavior of IAA and SA on the surface of the modified electrode (GH/GCE) was investigated by cyclic voltammetry and linear sweep voltammetry. Results show that the oxidation reactions of IAA and SA occur at different potentials, which enable their simultaneous detection at the sensing interface. Under optimal conditions, the GH/GCE exhibited good selectivity and stability and its response, unaffected by various interferents, was linear in the range of 4 to 200 μM of IAA and SA. The limit of detection (S/N = 3) achieved were 1.42 μM for IAA and 2.80 μM for SA. The sensor performance was validated by measuring for IAA and SA in real vegetable samples with satisfactory results.

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