Voltammetric analysis of naringenin at a disposable pencil graphite electrode – application to polyphenol content determination in citrus juice

2018 ◽  
Vol 10 (48) ◽  
pp. 5763-5772 ◽  
Author(s):  
Iulia Gabriela David ◽  
Simona Carmen Litescu ◽  
Dana Elena Popa ◽  
Mihaela Buleandra ◽  
Lorelei Iordache ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Graphite Electrode ◽  
Electrochemical Behaviour ◽  
Pencil Graphite Electrode ◽  
Polyphenol Content ◽  
Voltammetric Analysis ◽  
Citrus Juice ◽  
Content Determination ◽  
First Time

The electrochemical behaviour of the flavonoid naringenin (NGN) was investigated for the first time by cyclic voltammetry (CV), using a disposable electroactivated pencil graphite electrode (PGE*).

Preparation of a novel electrochemical sensor for phosphate detection based on a molybdenum blue modified poly(vinyl chloride) coated pencil graphite electrode

2019 ◽  
Vol 11 (30) ◽  
pp. 3874-3881 ◽  
Author(s):  
Melih Besir Arvas ◽  
Ozge Gorduk ◽  
Metin Gencten ◽  
Yucel Sahin
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Sensor ◽  
Vinyl Chloride ◽  
Graphite Electrode ◽  
Pencil Graphite Electrode ◽  
Molybdenum Blue ◽  
Phosphate Ions ◽  
Poly Vinyl Chloride ◽  
Phosphate Detection ◽  
First Time

Molybdenum blue was electrodeposited on a pencil graphite electrode (PGE) by cyclic voltammetry and it was used in the detection of phosphate ions for the first time in the literature.

Cheap pencil graphite electrodes for rapid voltammetric determination of chlorogenic acid in dietary supplements

2016 ◽  
Vol 8 (35) ◽  
pp. 6537-6544 ◽  
Author(s):  
I. G. David ◽  
D. E. Popa ◽  
M. Buleandra ◽  
Z. Moldovan ◽  
E. E. Iorgulescu ◽  
...  
Keyword(s):  
Chlorogenic Acid ◽  
Dietary Supplements ◽  
Graphite Electrode ◽  
Voltammetric Determination ◽  
Pencil Graphite Electrode ◽  
Green Coffee ◽  
Graphite Electrodes ◽  
First Time

A disposable pencil graphite electrode was used for the first time for rapid voltammetric determination of chlorogenic acid in green coffee dietary supplements.

Facile Preparation of Gold Nanoparticle Modified Pencil Graphite Electrode

2017 ◽  
Vol 730 ◽  
pp. 177-182
Author(s):  
Chokchai Puttharugsa ◽  
Puenisara Limnonthakul
Keyword(s):  
Cyclic Voltammetry ◽  
Gold Nanoparticle ◽  
Graphite Electrode ◽  
Trisodium Citrate ◽  
Pencil Graphite Electrode ◽  
Redox Probe ◽  
Diallyldimethylammonium Chloride ◽  
Electrochemical Signal ◽  
Gold Ion

The purpose of this research was to prepare gold nanoparticle (AuNP) modified disposable pencil graphite electrode (PGE). The AuNP was prepared using trisodium citrate reduced gold ion solution. The PGE surface modification was carried out by immersing a bare PGE in poly (diallyldimethylammonium chloride) (PDDA) and then in AuNP solution at room temperature. The characterization of the bare and modified PGE surfaces was carried out using field emission scanning electron microscopy (FESEM) and cyclic voltammetry in the presence of 0.1 M NaOH. The electrochemical behavior of the modified PGE electrode was investigated using cyclic voltammetry, and impedance spectroscopy in the presence of 5 mM [Fe (CN)6]3-/4- redox probe solution. The obtained result indicated that the modification of AuNP on the PGE surface provided a good electrochemical signal. In order to obtain more sensitive electrochemical signals, the effect of adsorbed AuNP on the PGE surface was also studied.

scholarly journals Disposable Pencil Graphite Electrode for Diosmin Voltammetric Analysis

Micromachines ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 351
Author(s):  
Iulia Gabriela David ◽  
Alexandra-Gabriela Oancea ◽  
Mihaela Buleandră ◽  
Dana Elena Popa ◽  
Emilia Elena Iorgulescu ◽  
...  
Keyword(s):  
Graphite Electrode ◽  
Cost Effective ◽  
Differential Pulse ◽  
Pencil Graphite Electrode ◽  
Hydroxyl Groups ◽  
Voltammetric Analysis ◽  
Electrode Processes ◽  
Beneficial Effects ◽  
Reversible Redox ◽  
Voltammetric Behavior

Diosmin (DIO) is a naturally occurring flavonoid with multiple beneficial effects on human health. The presence of different hydroxyl groups in diosmin structure enables its electrochemical investigation and quantification. This work presents, for the first time, diosmin voltammetric behavior and quantification on the cost-effective, disposable pencil graphite electrode (PGE). Diosmin oxidation on PGE involves two irreversible steps, generating products with reversible redox behaviors. All electrode processes are pH-dependent and predominantly adsorption-controlled. Differential pulse (DPV) and adsorptive stripping differential pulse (AdSDPV) voltammetric methods have been optimized for diosmin quantification o an H-type PGE, in 0.100 mol/L H2SO4. The linear ranges and limits of detection were for DPV 1.00 × 10−6–1.00 × 10−5 mol/L and 2.76 × 10−7 mol/L DIO for DPV and 1.00 × 10−7–2.50 × 10−6 mol/L and 7.42 × 10−8 mol/L DIO for AdSDPV, respectively. The DPV method was successfully applied for diosmin quantification in dietary supplement tablets. The percentage recovery was 99.87 ± 4.88%.

Kinetics of electrode reaction of Eu3+/Eu2+ studied by cyclic voltammetry and tast polarography

1990 ◽  
Vol 55 (7) ◽  
pp. 1666-1672 ◽  
Author(s):  
Jaroslav Němec ◽  
Tomáš Loučka
Keyword(s):  
Cyclic Voltammetry ◽  
Kinetic Parameters ◽  
Electrochemical Behaviour ◽  
Mercury Electrode ◽  
Electrode Reaction ◽  
Dropping Mercury Electrode ◽  
Sulphate Media ◽  
First Time ◽  
Kinetics Of ◽  
The Eu

The electrochemical behaviour of europium at the dropping mercury electrode was studied in the medium of 1M-NaClO4, 1M-NaCl, 1M-NaNO3, and 1M-Na2SO4. The curves obtained by Tast polarography and the kinetic parameters (ks, α) for the Eu3+/Eu2+ system in the medium of perchlorate and chloride solutions are in accord with the results published earlier. The kinetic parameters in nitrate and sulphate media are given for the first time. In the medium of nitrates, the electrode reaction is probably accompanied by a chemical reaction.

A first adrenalone electrochemical sensor using a gold-nanoparticle/poly(pyrrole) composite-modified graphite electrode

2019 ◽  
Vol 11 (20) ◽  
pp. 2658-2662 ◽  
Author(s):  
Shokoofe Jahandari ◽  
Mohammad Ali Taher ◽  
Hassan Karimi-Maleh
Keyword(s):  
Electrochemical Sensor ◽  
Gold Nanoparticle ◽  
Au Nanoparticles ◽  
Graphite Electrode ◽  
Pencil Graphite Electrode ◽  
Au Nps ◽  
First Time

In this study, a pencil graphite electrode (PGE) modified with a composite of polypyrrole and Au nanoparticles (Au-NPs/PP/PGE) was developed and evaluated as a novel electrochemical sensor for the determination of adrenalone for the first time.

Sign in / Sign up

Export Citation Format

Share Document