scholarly journals Simultaneous electrochemical determination of epinephrine and acetylcholine using modified screen printed electrode

2020 ◽  
Vol 2 (5) ◽  
pp. 563-572 ◽  
Keyword(s):  
Electrochemical Determination ◽  
Screen Printed Electrode ◽  
Screen Printed

scholarly journals A novel dopamine electrochemical sensor based on La3+/ZnO nanoflower modified graphite screen printed electrode

2019 ◽  
Vol 9 (3) ◽  
pp. 187-195 ◽  
Author(s):  
Somayeh Tajik ◽  
Hadi Beitollahi ◽  
Mohammad Reza Aflatoonian
Keyword(s):  
Modified Electrode ◽  
Phosphate Buffer Solution ◽  
High Sensitivity ◽  
Differential Pulse ◽  
Electrochemical Determination ◽  
Screen Printed Electrode ◽  
Buffer Solution ◽  
Optimized Conditions ◽  
Screen Printed

Flower-like La3+/ZnO nanocomposite was facile synthesized. A simple and ultrasensitive sensor based on graphite screen printed electrode (SPE) modified by La3+/ZnO nanoflower was developed for the electrochemical determination of dopamine. The electrochemical behavior of dopamine was studied in 0.1 M phosphate buffer solution (PBS) using cyclic voltammetry (CV), chronoamperometry (CA) and differential pulse voltammetry (DPV). Compared with the unmodified graphite screen printed electrode, the modified electrode facilitates the electron transfer of dopamine, since it notably increases the oxidation peak current of dopamine. Also, according to CV results the maximum oxidation of dopamine on La3+/ZnO/SPE occurs at 150 mV which is about 140 mV more negative compared with unmodified SPE. Under optimized conditions, the modified electrode exhibited a linear response over the concentration range from 0.15 to 300.0 μM, with a detection limit of 0.08 μM (S/N = 3). The proposed sensor exhibited a high sensitivity, good stability and was successfully applied for dopamine determination in dopamine ampoule, with high recovery.

Electrochemical Determination of Dextromethorphan on Reduced Graphene Oxide Modified Screen-Printed Electrode after Electromembrane Extraction

2014 ◽  
Vol 26 (3) ◽  
pp. 521-529 ◽  
Author(s):  
Ali Reza Fakhari ◽  
Mohammad Hossein Koruni ◽  
Hamid Ahmar ◽  
Abolfath Shahsavani ◽  
Siyavash Kazemi Movahed
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electrochemical Determination ◽  
Screen Printed Electrode ◽  
Reduced Graphene ◽  
Electromembrane Extraction ◽  
Screen Printed

scholarly journals Fabrication of an (α-Mn2O3:Co)-decorated CNT highly sensitive screen printed electrode for the optimization and electrochemical determination of cyclobenzaprine hydrochloride using response surface methodology

RSC Advances ◽  
2020 ◽  
Vol 10 (42) ◽  
pp. 24985-24993 ◽  
Author(s):  
Ahmed M. Abdel-Raoof ◽  
Ayman O. E. Osman ◽  
Ebrahim A. El-Desouky ◽  
Ashraf Abdel-Fattah ◽  
Rady F. Abdul-Kareem ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Carbon Nanotube ◽  
Response Surface ◽  
Electrochemical Determination ◽  
Screen Printed Electrode ◽  
Highly Sensitive ◽  
Screen Printed

A new chemically optimized screen-printed electrode modified with a cobalt-doped α-Mn2O3 nanostructure on carbon nanotube paste (α-Mn2O3:Co@CNTs) has been constructed for the recognition of cyclobenzaprine hydrochloride.

scholarly journals Electrochemical Behavior and Determination of Chlorogenic Acid Based on Carbon Nanotubes Modified Screen-Printed Electrode

2016 ◽  
Author(s):  
Xiao-Yan Ma ◽  
Hong-Qiao Yang ◽  
Hua-Bing Xiong ◽  
Xiao-Fen Li ◽  
Jing-Ting Gao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Differential Pulse ◽  
Electrochemical Determination ◽  
Optimal Conditions ◽  
Linear Regression Equation ◽  
Screen Printed Electrode ◽  
Redox Peak ◽  
Pulse Voltammetry ◽  
Screen Printed

In this paper, carbon nanotubes modified screen-printed electrode (CNTs/SPE) was prepared and the CNTs/SPE was employed for the electrochemical determination of antioxidant substance Chlorogenic acids (CGAs). A pair of well-defined redox peak of CGA was observed at the CNTs/SPE in 0.10 mol∙L-1 acetic acid-sodium acetate buffer (pH 6.2) and electrode process is adsorption-controlled. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) method for the determination of CGA were proposed based on the CNTs/SPE. Under the optimal conditions, the proposed method exhibited linear ranges from 4.73×10-7 to 4.45×10-5 mol∙L-1, the linear regression equation was Ipa(µA) = 4.1993 C (mol∙L-1)+1.1039 (r = 0.9976) and the detection limit for CGA could reach 3.25×10-6 mol∙L-1. The recovery of matrine was 94.74~106.65% (RSD = 2.92%) in coffe beans. The proposed method is quick, sensitive, reliable, and can be used for the determination of CGA.

scholarly journals A simple and sensitive approach for the electrochemical determination of amaranth by a Pd/GO nanomaterial-modified screen-printed electrode

RSC Advances ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 278-287
Author(s):  
Somayeh Tajik ◽  
Hadi Beitollahi ◽  
Ho Won Jang ◽  
Mohammadreza Shokouhimehr
Keyword(s):  
Human Health ◽  
Food Additives ◽  
Electrochemical Determination ◽  
Screen Printed Electrode ◽  
Screen Printed

It is essential to develop easy-to-use sensors towards a better monitoring of food additives so that human health can be positively influenced.

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