scholarly journals Electrochemical determination of tramadol using modified screen printed electrode

2021 ◽  
Author(s):  
Sayed ali Ahmadi ◽  
Sayed Zia Mohammadi ◽  
Maedeh Jafari ◽  
Peyman Mohammadzadeh Jahani ◽  
Raana Mashayekh
Keyword(s):  
Differential Pulse Voltammetry ◽  
Differential Pulse ◽  
Diagnostic Techniques ◽  
Electrochemical Determination ◽  
Screen Printed Electrode ◽  
Dynamic Activity ◽  
Multi Walled Carbon Nanotubes ◽  
Pulse Voltammetry ◽  
Walled Carbon Nanotubes ◽  
Screen Printed

The detection of tramadol using a screen printed electrode modified with La3+/ZnO nano-flowers and multi-walled carbon nanotubes (La3+/ZnO NFs-MWCNTs/SPE) is reported in this work. In order to examine tramadol electrochemical oxidation, the modified electrode was implemented with the utilization of differential pulse voltammetry, chronoamperometry and cyclic voltammetry as diagnostic techniques. The proposed electrode displays favorable electrocatalytic behavior concerning tramadol oxidation with an approximately 330 mV potential shift to a lesser positive potential. In the 0.5 to 800.0 μM range for tramadol, differential pulse voltammetry displays linear dynamic activity. Tramadol detection limit of 0.08 μM was derived within optimized testing conditions for this simple construction sensor. Lastly, this fabricated sensor was utilized with desirable results to determine tramadol in tramadol samples and urine samples.

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.

Ultrasensitive Electrochemical Determination of Phosphate in water by Hydrophilic TiO2 modified Glassy Carbon Electrodes

2021 ◽  
Author(s):  
Yan Jin ◽  
Tong QI ◽  
Yuqing Ge ◽  
Jin Chen ◽  
Li juan Liang ◽  
...  
Keyword(s):  
Differential Pulse Voltammetry ◽  
Glassy Carbon ◽  
Differential Pulse ◽  
Electrochemical Determination ◽  
Carbon Electrodes ◽  
Glassy Carbon Electrodes ◽  
Time Differential ◽  
Pulse Voltammetry ◽  
First Time

In this paper, ultrasensitive electrochemical determination of phosphate in water is achieved by hydrophilic TiO2 modified glassy carbon electrodes for the first time. Differential pulse voltammetry (DPV) method is proposed...

Electrochemical Detection of Short DNA Sequences Related to the Escherichia coli Pathogen Using a Zirconia-Modified Screen-Printed DNA Biosensor

2008 ◽  
Vol 61 (12) ◽  
pp. 962 ◽  
Author(s):  
Shao-Hua Zuo ◽  
Ling-Fan Zhang ◽  
Yan-Hui Zhao ◽  
Hui-Hui Yuan ◽  
Min-Bo Lan ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Methylene Blue ◽  
Differential Pulse Voltammetry ◽  
Dna Sequences ◽  
Differential Pulse ◽  
Dna Biosensor ◽  
Phosphate Group ◽  
Complementary Sequence ◽  
Pulse Voltammetry ◽  
Screen Printed

A simple, disposable and inexpensive electrochemical DNA biosensor based on a zirconia (ZrO2) modified thin film screen-printed electrode (ZrO2/SPE) has been developed. Short DNA sequences (21 monomer units) from the Escherichia coli pathogen, modified with a phosphate group at the 5′ end, were attached to the surface of the electrode through the affinity of the phosphate group for zirconia, to produce an effective DNA probe (ssDNA/ZrO2/SPE). DNA immobilization and hybridization were characterized using differential pulse voltammetry by employing methylene blue as redox indicator. Target sequences hybridized with the probe resulted in a decrease of the reduction peak current of methylene blue intercalated into the probe. The response of a non-complementary sequence and a single base pair mismatch sequence were both clearly distinguished from that of a complementary sequence. The developed biosensor had a high selectivity and sensitivity towards hybridization detection (10–10 M complementary DNA detectable). Making use of screen-printed technology, the fabrication of the biosensors exhibited satisfactory reproducibility, investigated by cyclic voltammetry and differential pulse voltammetry. The relative standard deviation was found to be <3.0% for six bare SPEs and six ssDNA-modified SPEs (ssDNA/ZrO2/SPE) from a batch.

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