Article
Chemistry, Analytical
Jing Xiao, Hao Wang, Chunxiang Li, Keqin Deng, Xiaofang Li
Summary: The study demonstrated that the combination of graphdiyne nanotubes and acidified multi-walled carbon nanotubes modified glassy carbon electrode exhibited high sensitivity and linear response in detecting dopamine in biological fluids.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Shu Tian, Xiaoya Wang, Chenchen Wang, Liqun Li, Wei Wei
Summary: In this study, a simple and label-free method using differential pulse voltammetry (DPV) was proposed for the sensitive detection of menthol. Silica microspheres (SiO2) were introduced for better modification and enrichment of ferrocene (Fc) on the electrode surface to improve detection sensitivity. The electrochemical signal of Fc was inhibited due to the inclusion action of Fc and ss-cyclodextrins (ss-CD), but showed remarkable recovery in the presence of menthol. The recovered electrochemical signal increased linearly with the concentration of menthol, providing a high sensitivity for quantitative detection.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Environmental Sciences
Do Mai Nguyen, Thanh Tam Toan Tran, Manh Dung Doan, Van Thuan Le, Quang Khieu Dinh
Summary: In this article, a disulfide tungsten/activated carbon composite derived from Eichhornia crassipes was synthesized and used as an electrode modifier to develop an electrochemical sensor for salbutamol detection. The sensor showed excellent selectivity and repeatability, and achieved high recovery rates for salbutamol detection in human biological fluids.
Article
Nanoscience & Nanotechnology
Chiara Abate, Giulia Neri, Angela Scala, Placido Giuseppe Mineo, Enza Fazio, Antonino Mazzaglia, Alex Fragoso, Ottavia Giuffre, Claudia Foti, Anna Piperno
Summary: The study demonstrates the successful electrochemical sensing of Hg(II) in aqueous solution using nanoassembly based on cationic cyclodextrin carbon nanotubes (CNT-CDs) and ferrocenylcarnosine (FcCAR). The CNTs were functionalized with beta-cyclodextrins (CDs) through a click chemistry reaction and subsequent reduction of residual nitrogen groups. The CNT-CDs were cast on screen-printed carbon electrodes (SPCEs) and their electrochemical response was evaluated using cyclic voltammetry (CV). The CNT-CD/FcCAR nanoassembly showed enhanced electroactive properties for Hg(II) detection. The sensor exhibited a linear concentration dependence in the range of 1-100 nM, with a sensitivity of 0.12 muA/nM, a limit of detection of 0.50 nM, and a limit of quantification of 1 nM.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Analytical
Ghada M. G. Eldin, Mohamed E. Khalifa, Alaa M. Munshi, Afrah M. Aldawsari, Nashwa M. El-Metwaly
Summary: This study proposed a novel analysis protocol for the sensitive differential pulse voltammetric determination of nadifloxacin, with improved performance of the working carbon paste electrodes by incorporating different carbonaceous nanomaterials. Through optimization, comprehensive studies were conducted on electrode composition, modification methods, electroanalytical parameters, and pH effects. The designed approach showed high sensitivity, stability, and reproducibility, with potential applicability in pharmaceutical preparations.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Physical
Izabela Bargiel, Joanna Smajdor, Anna Gorska, Beata Paczosa-Bator, Robert Piech
Summary: The newly developed voltametric method for highly sensitive propranolol determination showed good linearity and detection limit in experiments, high recovery rates in real samples, and good signal repeatability.
Article
Chemistry, Analytical
Merzak Doulache, S. Irem Kaya, Ahmet Cetinkaya, Nurgul K. Bakirhan, Mohamed Trari, Sibel A. Ozkan
Summary: In this study, an electrochemical sensing platform was prepared for the determination of regorafenib using multi-walled carbon nanotubes modified glassy carbon electrodes. The platform showed improved response signal and successful detection of regorafenib in various samples, including human serum and pharmaceutical tablet dosage forms.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Sengor Gabou Fogang, Gullit Deffo, Leopoldine Sonfack Guenang, Ranil Clement Tonleu Temgoua, Evangeline Njanja, Ignas Kenfack Tonle, Asim Bhaumik, Emmanuel Ngameni
Summary: A simple and reliable method based on a composite of Nafion, multiwalled carbon nanotubes, and mesoporous silica modified glassy carbon electrode is reported for individual and simultaneous determination of indigo carmine and carbendazim. The developed sensor exhibited excellent selectivity and the detection limits were low. The method was successfully applied for the determination of indigo carmine and carbendazim in different water samples.
ANALYTICAL LETTERS
(2023)
Article
Chemistry, Analytical
Sayed A. M. Marzouk, Aisha R. Alyammahi, Pablo Fanjul-Bolado
Summary: This paper describes three novel cells for electrochemical measurements, offering convenient electrical connection, excellent SPEC sealing, and versatility for various applications with different sample volumes. Additionally, a new experimental method is presented.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Krzysztof Kusmierek, Katarzyna Skrzypczynska, Andrzej Swiatkowski, Ewa Wierzbicka, Izabella Legocka
Summary: In this study, stainless steel fiber coated electropolymerized aniline and carbon nanotubes (CNTs) modified carbon paste electrodes were prepared for the detection of 4-chlorophenol (4-CP). The results demonstrated that CNT modified electrodes exhibited greater sensitivity for the detection of 4-CP. Additionally, the lowest detection limit and quantitation limit were observed for the electrode with the highest number of electropolymerization cycles.
Article
Chemistry, Analytical
Anna Gorska, Beata Paczosa-Bator, Robert Piech
Summary: A new, highly sensitive Adsorptive Stripping Voltammetric method for levodopa determination was developed using a modified glassy carbon electrode. By optimizing instrumental parameters, it was found that this method could be a useful tool in routine drug analysis. The study confirmed the accuracy and applicability of the developed voltammetric method through pharmaceutical products and tap water measurements.
Article
Materials Science, Multidisciplinary
Zondi Nate, Atal A. S. Gill, Suraj Shinde, Ruchika Chauhan, Shaukatali N. Inamdar, Rajshekhar Karpoormath
Summary: Multiwall carbon nanotubes incorporated with iron oxide nanoparticles were synthesized using a cost-effective method for fabricating a sensitive electrochemical sensor. The sensor showed good selectivity and sensitivity, making it suitable for quality control purposes.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Chemistry, Physical
Dariusz Guziejewski, Leon Stojanov, Rubin Gulaboski, Valentin Mirceski
Summary: This paper presents a theoretical analysis of reversible and quasireversible electrode reactions of a dissolved redox couple under the conditions of differential square-wave voltammetry (DSWV), a recently introduced hybrid technique combining the advantages of differential pulse voltammetry (DPV) and square-wave voltammetry (SWV). The potential modulation of DSWV involves potential steps and pulses, providing a variety of voltammetric curves that allow for a comprehensive characterization of the electrode reaction with a minimal number of measurements. Based on numerical simulations, criteria for characterizing and differentiating between reversible and quasireversible electrode reactions are established.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Electrochemistry
Mahsa Majidian, Goksu Ozcelikay, Ahmet Cetinkaya, Mehmet Altay Unal, Hasan Nazir, Esen Bellur Atici, Sibel A. Ozkan
Summary: An electrochemical method was developed and validated for the determination and quantification of Olaparib by using GCE-modified MWCNT and Fe2O3 nanoparticles. The linear concentrations of Olaparib were measured from 0.4 to 40 μM with a LOD of 6.4 nM and a LOQ of 21 nM. The nanomaterial-modified electrode successfully analyzed Olaparib in pharmaceutical dosage form and serum samples. In addition, the oxidation mechanism and properties of Olaparib were discussed using DFT.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Rashida Yahya, Tayyaba Kokab, Naimat Ullah, Muhammad Kamran Hakeem, Mazhar Hayat, Abdul Haleem, Afzal Shah, Iltaf Shah
Summary: A simple and sensitive electrochemical method was developed for the determination of ethyl violet dye in aqueous systems, utilizing a glassy carbon electrode modified with acidic-functionalized carbon nanotubes. Additionally, a photocatalytic degradation method using Ho/TiO2 nanoparticles was established for efficient removal of the dye. The modified electrode exhibited high sensitivity for EV detection, while alkaline medium was found to be more suitable for the photocatalytic degradation process of EV.
