Bienzyme amperometric biosensor using gold nanoparticle-modified electrodes for the determination of inulin in foods

2008 ◽  
Vol 375 (2) ◽  
pp. 345-353 ◽  
Author(s):  
Javier Manso ◽  
Ma Luz Mena ◽  
P. Yáñez-Sedeño ◽  
José M. Pingarrón
Keyword(s):  
Gold Nanoparticle ◽  
Modified Electrodes ◽  
Amperometric Biosensor

Gold nanoparticle-doped three-dimensional reduced graphene hydrogel modified electrodes for amperometric determination of indole-3-acetic acid and salicylic acid

Nanoscale ◽  
2019 ◽  
Vol 11 (21) ◽  
pp. 10247-10256 ◽  
Author(s):  
Xiaodong Cao ◽  
Xueting Zhu ◽  
Shudong He ◽  
Xuan Xu ◽  
Yongkang Ye ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Salicylic Acid ◽  
Gold Nanoparticle ◽  
Three Dimensional ◽  
Modified Electrodes ◽  
Amperometric Determination ◽  
Reduced Graphene ◽  
Indole 3 Acetic Acid

Three-dimensional (3D) networked nanomaterials have attracted great interest because of their unique porous and 3D-networked structures.

scholarly journals Voltammetric determination of aluminium(III) at tannic acid capped-gold nanoparticle modified electrodes

2018 ◽  
Vol 265 ◽  
pp. 682-690 ◽  
Author(s):  
Alex L. Suherman ◽  
Eden E.L. Tanner ◽  
Sabine Kuss ◽  
Stanislav V. Sokolov ◽  
Jennifer Holter ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
Tannic Acid ◽  
Modified Electrodes ◽  
Voltammetric Determination

Gold nanoparticle decorated multiwalled carbon nanotube modified electrodes for the electrochemical determination of theophylline

2018 ◽  
Vol 10 (47) ◽  
pp. 5634-5642 ◽  
Author(s):  
Wanderson da Silva ◽  
Mariana Emilia Ghica ◽  
Christopher M. A. Brett
Keyword(s):  
Carbon Nanotube ◽  
Gold Nanoparticle ◽  
Modified Electrode ◽  
Modified Electrodes ◽  
Electrochemical Determination ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon

Theophylline determination at gold nanoparticle/carbon nanotube modified electrode and analysis in commercial pharmaceutical and tea samples.

A Review of Voltammetric Methods for Determination of Dopamine Agonists

2020 ◽  
Vol 16 ◽  
Author(s):  
Fatma Ağin
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Biological Samples ◽  
Dopamine Agonists ◽  
Modified Electrodes ◽  
Nerve Cells ◽  
Electroanalytical Methods ◽  
Voltammetry Methods ◽  
Voltammetric Methods

Background: Dopamine agonists are useful drugs for the management of patients with Parkinson's disease in the early stages and in later stages of the disease. Parkinson's disease is a progressive neurodegenerative disease that primarily affects dopamine-producing nerve cells in the brain. They bind to dopamine receptors in nerve cells that regulate body movement and motor function. Electroanalytical methods are used in medicinal, clinical and pharmaceutical research. The voltammetry is one of the most commonly used electroanalytical methods. The aims of this review are to gather and discuss studies of voltammetric methods used in determination of dopamine agonists. Method: This review includes the use of various voltammetric methods for determination studies of dopamine agonists from pharmaceutical dosage forms and biological samples. These studies were examined in terms of used voltammetric method or methods, working electrode, buffer, pH and validation parameters. Results: Cabergoline, pramipexole, ropinirole have more studies, while bromocriptine and apomorphine have fewer studies in the literature. Differential pulse voltammetry and square wave voltammetry methods were the most applied methods for determination of dopamine agonist drugs from pharmaceuticals and biological samples. But, stripping, cyclic and lineer sweep voltammetry methods are less applied methods. In this studies, a lot of modified electrodes were developed and used to analyse of dopamine agonists. Conclusion: The voltammetric methods supply determination of therapeutic agents and/or their metabolites in clinical samples at extremely low concentrations without the necessity for the sample pre-treatment or time consuming extraction steps. Also the modified electrodes and validated voltammetric methods provide good stability, repeatability, reproducibility and high recovery for the analysis of the analyte.

Electroanalysis of Tricyclic Psychotropic Drugs using Modified Electrodes

2019 ◽  
Vol 15 (4) ◽  
pp. 423-442 ◽  
Author(s):  
Mona Habibi-Kool-Gheshlaghi ◽  
Farnoush Faridbod ◽  
Mahya Karami Mosammam ◽  
Mohammad Reza Ganjali
Keyword(s):  
Psychotropic Drugs ◽  
Analytical Methods ◽  
Electrochemical Techniques ◽  
Modified Electrodes ◽  
Electroanalytical Methods ◽  
Drug Assays ◽  
Medical Importance ◽  
Tricyclic Rings ◽  
Easy Operation

Background: Tricyclic psychotropic drugs are defined as a tricyclic rings of the dibenzazepine group with the presence of sulfur and nitrogen atoms. They have been prescribed for antidepressive therapy over the years. Due to their medical importance, many analytical methods have been developed for their monitoring. However, benefits of electrochemical techniques such as costeffectiveness, fast, easy operation and non-destructiveness make them appropriate analytical methods for drug assays. Electrochemical determinations of pharmaceuticals require suitable working electrodes. During years, many electrodes are modified by a variety of modifiers and several sensors were developed based on them. In this regard, nanomaterials, due to their remarkable properties, are one of the most important choices. Objective: Here, the application of electroanalytical methods in the determination of electroactive tricyclic psychotropic drugs will be reviewed and the nanomaterials which are used for improvements of the working electrodes will be considered.

scholarly journals Voltammetric sensor based on long alkyl chain tetraalkylammonium ionic liquids comprising ascorbate anion for determination of nitrite

2021 ◽  
Vol 188 (2) ◽  
Author(s):  
Tomasz Rębiś ◽  
Michał Niemczak ◽  
Patrycja Płócienniczak ◽  
Juliusz Pernak ◽  
Grzegorz Milczarek
Keyword(s):  
Ionic Liquids ◽  
Electrostatic Interactions ◽  
Film Surface ◽  
Modified Electrodes ◽  
Voltammetric Sensor ◽  
Nitrite Oxidation ◽  
Alkyl Chains ◽  
Modified Surface ◽  
Influence Of Ph

AbstractAn electrochemical sensor was fabricated utilizing ionic liquids possessing cations with long alkyl chains such as trimethyl octadecylammonium and behenyl trimethylammonium and ascorbate anion. The ionic liquids were drop-coated onto the electrode. Thin modifying layers were prepared. Cyclic voltammetric investigations revealed electrostatic interactions between the electrochemical probes and the modified surface, proving that a positive charge was established at the film surface. Hence, negatively charged species such as nitrite can be pre-concentrated on the surface of presented modified electrodes. The fabricated electrodes have been used as a voltammetric sensor for nitrite. Due to the electrostatic accumulation properties of long alkyl cation, the assay exhibits a remarkable improvement in the voltammetric response toward nitrite oxidation. The influence of pH on the electrode response was thoroughly investigated, and the mechanism of the electrode was established. The developed sensor showed a linear electrochemical response in the range 1.0–50 μM with a detection limit of 0.1 μM. The electrode revealed good storage stability, reproducibility, and anti-interference ability. The determination of nitrite performed in curing salts brought satisfactory results. Graphical abstract

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