scholarly journals A Screen-Printed Electrode Modified With Graphene/Co3O4 Nanocomposite for Electrochemical Detection of Tramadol

2020 ◽  
Vol 8 ◽  
Author(s):  
Mohammad Reza Aflatoonian ◽  
Somayeh Tajik ◽  
Behnaz Aflatoonian ◽  
Hadi Beitollahi ◽  
Kaiqiang Zhang ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Detection Limit ◽  
Linear Sweep Voltammetry ◽  
Differential Pulse ◽  
Linear Sweep ◽  
Screen Printed Electrode ◽  
Pulse Voltammetry ◽  
Phosphate Buffered Saline ◽  
Urine Specimens ◽  
Screen Printed

In this paper, graphene (Gr)/Co3O4 nanocomposite was synthesized and utilized for the development of a novel electrochemical sensor to detect tramadol. Tramadol determination was examined by linear sweep voltammetry, differential pulse voltammetry, cyclic voltammetry, and chronoamperometry on Gr/Co3O4 nanocomposite-modified screen-printed electrode (Gr/Co3O4/SPE) in phosphate-buffered saline (PBS). Under the optimized condition, the detection limit of tramadol is 0.03 μM (S/N = 3) in the linear ranges of 0.1–500.0 μM. Furthermore, Gr/Co3O4/SPE was satisfactorily utilized to detect tramadol in tramadol tablet and urine specimens.

Determination of chromium(iii) by differential pulse stripping voltammetry at a chitosan–gold nanocomposite modified screen printed electrode

2016 ◽  
Vol 8 (5) ◽  
pp. 962-967 ◽  
Author(s):  
Shixin Wu ◽  
Nadia Chandra Sekar ◽  
Swee Ngin Tan ◽  
Hong Xie ◽  
Sum Huan Ng
Keyword(s):  
Detection Limit ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Trivalent Chromium ◽  
Screen Printed Electrode ◽  
Differential Pulse Stripping Voltammetry ◽  
Pulse Voltammetry ◽  
Gold Nanocomposites ◽  
Screen Printed

Detection of trivalent chromium with screen printed electrodes modified by chitosan–gold nanocomposites using differential pulse voltammetry (DPSV), showing a linear range from 1 to 100 μM and a detection limit of 0.4 μM (based on 3σ).

Polarographic and voltammetric determination of N,N-dimethyl-4-aminoazobenzene

1986 ◽  
Vol 51 (10) ◽  
pp. 2083-2090 ◽  
Author(s):  
Jiří Barek ◽  
Roman Hrnčíř
Keyword(s):  
Linear Sweep Voltammetry ◽  
Differential Pulse ◽  
Differential Pulse Polarography ◽  
Hanging Mercury Drop Electrode ◽  
Chemical Carcinogen ◽  
Linear Sweep ◽  
Pulse Polarography ◽  
Pulse Voltammetry ◽  
Methanolic Medium

Conditions were found for the determination of chemical carcinogen N,N-dimethyl-4-aminoazobenzene by TAST and differential pulse polarography, fast scan differential pulse voltammetry and linear sweep voltammetry at a hanging mercury drop electrode in a mixed aqueous-methanolic medium. The detection limit of the last two methods, approximately 10-8 mol l-1, can be further lowered by preliminary accumulation of the substance to be determined by adsorption at a working electrode. The applicability of these methods to the analysis of biological materials, directly or combined with an extraction, was demonstrated.

scholarly journals Electrochemical measurements of ascorbic acid based on graphite screen printed electrode modified with La3+/Co3O4 nanocubes transducer

2019 ◽  
Vol 9 (3) ◽  
pp. 197-206 ◽  
Author(s):  
Mohammad Reza Aflatoonian ◽  
Somayeh Tajik ◽  
Behnaz Aflatoonian ◽  
Hadi Beitollahi
Keyword(s):  
Ascorbic Acid ◽  
Detection Limit ◽  
Differential Pulse ◽  
Fast Response ◽  
Acid Oxidation ◽  
Screen Printed Electrode ◽  
Real Time Analysis ◽  
Good Repeatability ◽  
Optimized Conditions ◽  
Screen Printed

Electrochemical characterization of ascorbic acid oxidation on a graphite screen printed electrode (SPE) modified with La3+/Co3O4nanocubes is performed by applying cyclic voltammetry (CV), chronoamperometry (CHA), and differential pulse voltammetry (DPV) techniques. Synthesized La3+/Co3O4nanocubes for SPE modification, La3+/Co3O4/SPE, enhance the ascorbic acid electrooxidation kinetics by reducing the anodic overpotential. Excellent La3+/Co3O4/SPE electrochemical properties provide sensitive ascorbic acid voltammetric determination with low detection limit, good stability and quick response towards electrooxidation of ascorbic acid as compared to bare SPE. Under optimized conditions, DPV current demonstrates a linear response for ascorbic acid over a concentration range of 1.0 to 900.0 mM with a correlation coefficient of 0.9997, and detection limit (LOD) (S/N = 3) = 0.3 mM. The proposed procedure offers a potential application for producing the sensor with good repeatability. Also, fast response of fabricated sensor can allow a real-time analysis of real samples.

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.

scholarly journals Electrochemical Detection of a Local Anesthetic Dibucaine at Arrays of Liquid|Liquid MicroInterfaces

Chemosensors ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 15
Author(s):  
Eissa Mohamed Almbrok ◽  
Nor Azah Yusof ◽  
Jaafar Abdullah ◽  
Ruzniza Mohd Zawawi
Keyword(s):  
Cyclic Voltammetry ◽  
Detection Limit ◽  
Bovine Serum Albumin ◽  
Limit Of Detection ◽  
Differential Pulse ◽  
Gibbs Energy Of Transfer ◽  
Pulse Voltammetry ◽  
Energy Of Transfer ◽  
The Impact ◽  
Transfer Potential

Electrochemical characterization and detection of protonated dibucaine (DIC+) at microinterface array across water|1,6-dichlorohexane were performed using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Some thermodynamic parameters of dibucaine, such as the standard transfer potential, the Gibbs energy of transfer and the partition coefficient, were estimated by CV. In addition to the analytical parameters, the impact of bovine serum albumin (BSA) on dibucaine detection (in artificial serum matrices) was also investigated. DPV was applied to detect a lower concentration of DIC+, resulting in a detection limit of 0.9 ± 0.06 µM. While the presence of BSA affected CV, demonstrated as reduced current responses, DPV was confirmed to be an efficient method for lowering concentrations of the dibucaine detection in the artificial serum matrix in the presence of BSA, with a limit of detection (LOD) of 1.9 ± 0.12 µM.

scholarly journals Determination of Trace Lead and Cadmium in Decorative Material Using Disposable Screen-Printed Electrode Electrically Modified with Reduced Graphene Oxide/L-Cysteine/Bi-Film

Sensors ◽  
2020 ◽  
Vol 20 (5) ◽  
pp. 1322 ◽  
Author(s):  
Xiaopeng Hou ◽  
Benhai Xiong ◽  
Yue Wang ◽  
Li Wang ◽  
Hui Wang
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electrochemical Impedance ◽  
Low Cost ◽  
Linear Sweep Voltammetry ◽  
Differential Pulse ◽  
Screen Printed Electrode ◽  
Lead And Cadmium ◽  
Reduced Graphene ◽  
Screen Printed

Cadmium (Cd) and lead (Pb) in decorative materials threaten human health. To determine the content of Cd(II) and Pb(II), a disposable screen-printed electrode (DSPE) electrically modified with reduced graphene oxide (rGO) and L-cysteine (LC) was fabricated, which was further electroplated with bismuth film (Bi/LC-rGO/DSPE) in situ. The electrochemical properties of this electrode were studied using cyclic voltammetry, electrochemical impedance spectroscopy, linear sweep voltammetry and differential pulse voltammetry. The results indicated that the Bi/LC-rGO/DSPE had excellent sensitivity, selectivity and stability with low cost and easy production. After optimizing the detection parameters, the linear range of the Bi/LC-rGO/DSPE was from 1.0 to 30.0 μg/L for Cd(II) and Pb(II), and the detection limits were 0.10 μg/L for Cd(II) and 0.08 μg/L for Pb(II). Finally, the Bi/LC-rGO/DSPE was applied to determine the concentrations of Cd(II) and Pb(II) in different decorative materials where the recoveries were in the range from 95.86% to 106.64%.

Electrochemical Determination of Inorganic Phosphate

2011 ◽  
Vol 339 ◽  
pp. 435-439 ◽  
Author(s):  
Wen Juan Zheng ◽  
Hai Tao Zheng ◽  
Yan Ling Li ◽  
Xing Sheng Wang ◽  
Shin Ichiro Suye
Keyword(s):  
Cyclic Voltammetry ◽  
Detection Limit ◽  
Electrode Surface ◽  
Inorganic Phosphate ◽  
Differential Pulse ◽  
Electrochemical Determination ◽  
Sensor Response ◽  
Pulse Voltammetry ◽  
Phosphate Sensor

An electrochemical phosphate sensor based on the precipitation of molybdophosphate on electrode surface was developed for the determination of inorganic phosphate. The condition for the formation of the molybdophosphate was studied and cyclic voltammetry and differential pulse voltammetry were utilized for the determination. A detection limit of 10 ppm was obtained and the sensor response was approximate liner in the range between 10-100 ppm.

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