scholarly journals A Voltammetric Electronic Tongue Based on Commercial Screen-printed Electrodes for the Analysis of Aminothiols by Differential Pulse Voltammetry

2017 ◽  
Vol 29 (6) ◽  
pp. 1559-1565 ◽  
Author(s):  
Clara Pérez-Ràfols ◽  
Ana Gómez ◽  
Núria Serrano ◽  
José Manuel Díaz-Cruz ◽  
Cristina Ariño ◽  
...  
Keyword(s):  
Differential Pulse Voltammetry ◽  
Electronic Tongue ◽  
Differential Pulse ◽  
Screen Printed Electrodes ◽  
Pulse Voltammetry ◽  
Voltammetric Electronic Tongue ◽  
Screen Printed

scholarly journals Electrochemically Reduced Graphene Oxide-Based Screen-Printed Electrodes for Total Tetracycline Determination by Adsorptive Transfer Stripping Differential Pulse Voltammetry

Sensors ◽  
2019 ◽  
Vol 20 (1) ◽  
pp. 76 ◽  
Author(s):  
Anabela S. Lorenzetti ◽  
Tania Sierra ◽  
Claudia E. Domini ◽  
Adriana G. Lista ◽  
Agustin G. Crevillen ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Differential Pulse Voltammetry ◽  
Reduced Graphene Oxide ◽  
Selective Adsorption ◽  
Differential Pulse ◽  
Screen Printed Electrodes ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide ◽  
Pulse Voltammetry ◽  
Screen Printed

Disposable electrochemically reduced graphene oxide-based (ERGO) screen-printed electrodes (SPE) were developed for the determination of total tetracyclines as a sample screening approach. To this end, a selective adsorption-detection approach relied on adsorptive transfer stripping differential pulse voltammetry (AdTDPV) was devised, where the high adsorption capacity and the electrochemical properties of ERGO were simultaneously exploited. The approach was very simple, fast (6 min.), highly selective by combining the adsorptive and the electrochemical features of tetracyclines, and it used just 10 μL of the sample. The electrochemical sensor applicability was demonstrated in the analysis of environmental and food samples. The not-fully explored AdTDPV analytical possibilities on disposable nanostructured transducers become a new tool in food and environmental fields; drawing new horizons for “in-situ” analysis.

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.

scholarly journals CUPRAC Voltammetric Determination of Antioxidant Capacity in Tea Samples by Using Screen-Printed Microelectrodes

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Alina Elena Trofin ◽  
Lucia Carmen Trincă ◽  
Elena Ungureanu ◽  
Adina Mirela Ariton
Keyword(s):  
Antioxidant Capacity ◽  
Differential Pulse Voltammetry ◽  
Low Cost ◽  
Differential Pulse ◽  
Food Samples ◽  
Open Circuit ◽  
Rapid Response ◽  
Detection Methods ◽  
Pulse Voltammetry ◽  
Screen Printed

Measurement of antioxidant capacity represents an analytical major challenge in terms of accuracy, efficiency, rapid response, or low cost of detection methods. Quantification of antioxidant capacity of food samples using disposable screen‐printed microelectrodes (SPMEs) was based on cyclic voltammetry versus open-circuit potential (CV vs OCP) and differential pulse voltammetry (DPV) as compared with spectrophotometric measurement of the CUPRAC reaction with 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid (trolox). The SPMEs are organic‐resistant electrodes and thus compatible with food samples and organic solvents used to dissolve trolox. A micropipette was used to release a drop of 50 μL sample on the spotted surface of the SPME sensor/working electrode that was time programmed to function according to the working protocol. The SPME response was linearly correlated with trolox content. This preliminary demonstration was focused on the analysis of tea infusions, due to the simplicity and reproducibility of the samples’ preparations involved. Analytical results of the antioxidant capacity (expressed as mol·L−1 trolox equivalents) of the tea samples showed a good agreement in the case of spectrophotometry and differential pulse voltammetry (R2 > 0.998). DPV with SPME based on CUPRAC reactions was proven to be a promising approach for the characterization of antioxidant capacity of tea samples with rapid response, cost-effectiveness, and simplicity of operation.

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 MODIFIKASI SPCE (SCREEN PRINTED CARBON ELECTRODE) DENGAN PEDOT-PSS (POLY (3,4-ETHYLENEDIOXYTHIOPHENE) POLY (STYRENE SULFONIC ACID)) UNTUK PENENTUAN FENOL

2020 ◽  
Vol 1 (1) ◽  
pp. 39-45
Author(s):  
Farahdilla Andhika
Keyword(s):  
Differential Pulse Voltammetry ◽  
Sulfonic Acid ◽  
Differential Pulse ◽  
Carbon Electrode ◽  
Screen Printed Carbon Electrode ◽  
Pulse Voltammetry ◽  
Styrene Sulfonic Acid ◽  
Screen Printed

Pada penelitian ini, modifikasi Screen Printed Carbon Electrode (SPCE) secara fisik dilakukan dengan menggunakan poly (3,4-ethylenedioxythiophene) -poly (styrene sulfonic acid) (PEDOT-PSS) untuk meningkatkan sensitivitas penentuan fenol secara voltametri. Pengukuran fenol dilakukan dengan metode differential pulse voltammetry (DPV) pada kisaran potensial -0,5 sampai 1 Volt, durasi 180 detik, potensial deposisi -0,5 Volt, dan kecepatan penyapuan 100 mV/s pada pH 6-9, rentang konsentrasi fenol 0-100 mikro M, serta konsentrasi PEDOT-PSS sebesar 0-100%. Berdasarkan hasil penelitian, peningkatan konsentrasi PEDOT-PSS berpengaruh terhadap respon arus. Kondisi optimum dicapai pada pH 8 dengan konsentrasi PEDOT-PSS 50%, sensitivitas sebesar 0.009 mikro A/mikro M dengan batas deteksi 0.1595 mikro M.

Sign in / Sign up

Export Citation Format

Share Document