Article
Electrochemistry
Luz E. Rebolledo-Perales, Giaan A. Alvarez Romero, Israel Ibarra, Carlos Andres Galan-Vidal, Juan Francisco Flores-Aguilar, I Perez-Silva
Summary: A highly selective sensor based on carbon paste electrodes (CPE) and ion-imprinted polymers (IIP) was proposed for the analysis of lead (II) in real water samples. By optimizing the analysis parameters, a linear concentration range and low detection limit were achieved. The method allows accurate quantification of lead (II) in complex samples without pre-treatment.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Electrochemistry
Salhah D. Al-Qahtani, Ahmed Hameed, Enas Aljuhani, Ali Sayqal, Reem Shah, Fawaz Saad, Nashwa M. El-Metwaly
Summary: The study developed a novel carbon paste electrode incorporated with zeolite for sensitive determination of cyclopentolate, allowing simultaneous analysis of cyclopentolate in pharmaceutical formulations containing phenylephrine, excipients, or degradation products.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2021)
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, Analytical
Rasha Th El-Eryan, Safaa S. Toubar, Azza A. Ashour, Mona S. Elshahed
Summary: A new, simple and highly sensitive electrochemical method based on zirconium oxide nanoparticles modified carbon paste electrode was developed for simultaneous determination of Mebendazole and Levamisole HCl in drug substance, dosage form and human plasma. The method showed excellent sensitivity and low detection limits for both analytes.
Article
Chemistry, Analytical
Awadh O. AlSuhaimi, Khalid Althumayri, Hussain Alessa, Ali Sayqal, Amal T. Mogharbel, Bandar R. Alsehli, Nashwa M. El-Metwaly
Summary: This research presents the development and electroanalytical performance of a novel carprofen voltammetric carbon paste electrode (CPEs). The electrode matrix is fortified with zeolite nanostructures, resulting in an effective electrocatalytic activity that facilitates the oxidation of carprofen molecules. The proposed electrooxidation mechanism involves the oxidation of the enamine N atom through the transfer of delocalized lone pair of electrons, along with the participation of one proton. The utilization of ZY/CPEs allows for simultaneous quantification of carprofen in the presence of various interferents and degradation products, with high sensitivity and selectivity. The presented voltammetric analytical technique exhibits comparable recovery values compared to official chromatographic techniques for monitoring carprofen residues in veterinary and biological samples.
MICROCHEMICAL JOURNAL
(2023)
Article
Electrochemistry
Sen Fan, Lei Ji, Guoliang Mao, Huan Wang, Yongkui Fang, Jiguo Duan, Yuanhai Zhu, Hua Song
Summary: The electrode reaction mechanism of TMZ was studied and determined as a two-electron/two-proton process, with electrostatic attraction being the main factor influencing adsorption and peak current. PACPE exhibited excellent electrocatalytic effects towards the oxidation of TMZ, making it suitable for the determination of TMZ in pharmaceutical formulations.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2021)
Article
Chemistry, Analytical
Fatehy M. Abdel-Haleem, Sonia Mahmoud, Nour Eldin T. Abdel-Ghani, Rasha Mohamed El Nashar, Mikhael Bechelany, Ahmed Barhoum
Summary: Levofloxacin (LF) is an important antibiotic used for bacterial infections. Three carbon paste electrodes (CPEs) were fabricated for LF determination, with the PVC membrane modified CPE showing improved sensitivity and selectivity.
Article
Chemistry, Multidisciplinary
Youstina Mekhail Metias, Emad Mohamed Hussien, Mervat Mohamed Hosny, Magda Mohamed Ayad
Summary: This study applied a sensitive and cost-effective differential pulse voltammetric technique to investigate the electrochemical behavior of alfuzosin hydrochloride, using silica gel modified carbon paste and pencil graphite electrodes. The optimized voltammetric conditions revealed an irreversible anodic peak in Britton-Robinson buffered medium, with electrochemical responses linearly correlated with alfuzosin concentrations and higher electrocatalytic activity at PGE with a low detection limit.
ACTA CHIMICA SLOVENICA
(2022)
Article
Chemistry, Multidisciplinary
E. I. Maksyutova, A. V. Sidelnikov, A. G. Mustafin, E. V. Govorov
Summary: Electrochemical methods of analysis are increasingly being used in various industries to improve product quality. This study focuses on sugar and sugar color, proposing a method to differentiate sugars and colors from different manufacturers. This method can be applied in the food industry for rapid analysis of the origin of sugar and other soluble products.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Analytical
Ashraf M. Mahmoud, Mater H. Mahnashi, Mohamed M. El-Wekil
Summary: In this study, a carbon paste electrode modified with Cu-MOF nanocomposite was utilized for the analysis of cyanide. The electrode showed good electrochemical performance and selectivity for CN- measurement, with results confirmed through various characterization techniques and methods. This method was successfully applied for the determination of CN- in different environmental water samples.
Article
Chemistry, Analytical
Paula Clares, Clara Perez-Rafols, Nuria Serrano, Jose Manuel Diaz-Cruz
Summary: In this work, a simple, fast, sensitive, and low-cost method using a screen-printed carbon electrode (SPCE) was developed for the simultaneous determination of AA, PA, DX, and CF in both pharmaceutical formulations and environmental samples. The method exhibited linear dependence between the oxidative peak current and concentration, with low detection limits and good recoveries.
Article
Materials Science, Multidisciplinary
Mehrshad Bornaei, Habibollah Khajehsharifi, Saeed Shahrokhian, Omid Sheydaei, Ali Zarnegarian
Summary: In this study, metal-organic frameworks (MOFs) MIL-101(Cr) and nanoparticles were synthesized using the hydrothermal method. The resulting MOF exhibited high porosity and activity centers, leading to excellent electrochemical performance. A fabricated electrochemical sensor based on the MOF displayed good responses for detecting kynurenic acid (KYNA). The sensor showed reversible current responses for KYNA, while the bare electrode had no responses.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Ceramics
Somayeh Tajik, Hadi Beitollahi, Mehdi Shahedi Asl, Ho Won Jang, Mohammadreza Shokouhimehr
Summary: The present study utilized a nanocomposite material to modify a carbon paste electrode for the detection of sulfamethoxazole. The novel sensor showed a linear response with low detection and quantitation values for SMZ, making it suitable for analyzing SMZ in real samples.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Analytical
Elena Alberto, Julio Bastos-Arrieta, Clara Perez-Rafols, Nuria Serrano, M. Silvia Diaz-Cruz, Jose Manuel Diaz-Cruz
Summary: A DPV method using SPCEs was developed for the determination of SMX, showing a good detection limit (15 μg/L) and a wide linear range (50-600 μg/L) with good repeatability and reproducibility. The method was successfully applied to the analysis of a spiked tap water sample, demonstrating high reproducibility and good trueness. Additional considerations were made on the pH-dependent electrochemical oxidation of SMX and the role of the free terminal amino group in oxidation.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Analytical
Sanja Mutic, Jasmina Anojcic, Milan Vranes, Jovana Panic, Snezana Papovic
Summary: The rapid and sensitive determination of organic UV filters BP-3 and AVO was achieved using an ionic liquid carbon paste electrode (IL-CPE), with [N-C4-3C1Py]Cl-CPE showing more favorable interactions. The IL-based voltammetric sensor demonstrated good selectivity and potential for quantifying the selected UV filters in various real samples.
