Selective analysis of epinephrine in the presence of uric acid by using an amplified electrochemical sensor employing a gold nanoparticle decorated cysteic acid film

2017 ◽  
Vol 9 (45) ◽  
pp. 6394-6402 ◽  
Author(s):  
G. Karim-Nezhad ◽  
Z. Khorablou
Keyword(s):  
Gold Nanoparticles ◽  
Uric Acid ◽  
Electrochemical Sensor ◽  
Gold Nanoparticle ◽  
Glassy Carbon ◽  
Cysteic Acid ◽  
Carbon Electrode ◽  
Selective Determination ◽  
Selective Analysis

In the present work, an effective electrochemical sensor for the rapid and selective determination of epinephrine (EP) in the presence of uric acid (UA) based on a glassy carbon electrode (GCE) modified with gold nanoparticles (AuNPs) and cysteic acid was applied.

Self-Assembled Hybrid Films of Graphene/Carbon Nanotube Modified Electrode for Sensitive and Selective Determination of Rutin

2012 ◽  
Vol 531 ◽  
pp. 419-422 ◽  
Author(s):  
Zong Hua Wang ◽  
Shu Yan Yao ◽  
Jian Fei Xia ◽  
Fei Fei Zhang ◽  
Xin Mei Guo ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Electrochemical Sensor ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Rapid Determination ◽  
Carbon Electrode ◽  
Modified Glassy Carbon Electrode ◽  
Hybrid Films ◽  
Selective Determination

Abstract: Graphene/Carbon Nanotube hybrid films modified glassy carbon electrode (GN-CNT/GC) was fabricated as electrochemical sensor for the sensitive and rapid determination of rutin. The electrochemical behaviors of rutin at the GN-CNT/GC have been investigated. Rutin can generate a pair of well-defined redox peaks at the GN-CNT/GC located at 0.450 V (Epa) and 0.409 V (Epc). Compared with graphene modified glassy carbon electrode (GN/GC) and carbon nanotube modified glassy carbon electrode (CNT/GC), GN-CNT/GC showed a higher catalytic activity toward rutin. This result indicates that the GN-CNT hybrid films as a modifier strengthens the adsorption of rutin. Cyclic voltammetry (CV), different pulse voltammetry (DPV) and transmission electron microscopy (TEM) were employed to characterize the electrochemical sensor and hybrid films. Under the optimal conditions, the oxidation peak current is linear to the rutin concentration over the range of 2.0×10-7-6.0×10-5 M and the detection limits were 1.0×10-7 M.

Electrochemical determination of trace copper(ii) based onl-cysteine functionalized gold nanoparticle/CdS nanosphere hybrid

2016 ◽  
Vol 8 (17) ◽  
pp. 3592-3598 ◽  
Author(s):  
Lin-Gang Li ◽  
Meng Chen ◽  
He-Qun Hao ◽  
Qing-Qing Xu ◽  
Ju Wu ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Electrochemical Determination ◽  
Carbon Electrode ◽  
Electrochemical Assay ◽  
Functionalized Gold Nanoparticles ◽  
Sensing Platform

This paper describes a simple and efficient electrochemical assay for the determination of trace Cu(ii) employingl-cysteine functionalized gold nanoparticles/CdS nanospheres/glassy carbon electrode (l-cys/AuNPs/CdS/GCE) as an enhanced sensing platform.

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