Trends on the development of non-enzymatic electrochemical sensors modified with metal-organic frameworks for the quantification of glucose
Autores: LE Rebolledo-Perales, P Hernández, GA Álvarez-Romero, D Hernández-Ramírez
Fecha de publicación: 2023/8/14
Origen: Journal of The Electrochemical Society
Volumen: 170
Número: 8
Páginas: 087507
Editor: IOP Publishing
Descripción: Glucose is the principal source of energy for humans and its quantification in physiological samples can diagnose or prevent diseases. Commonly, glucose determination is based on spectrophotometric-enzymatic techniques, but at least since a decade ago, electroanalytical strategies have emerged as promising alternatives providing accuracy and precision in the determination of biomolecules. This review focuses on the development of non-enzymatic methodologies based on modified electrochemical sensors with Metal-Organic Frameworks (MOF) for glucose detection sensors in physiological samples (blood and urine). Glassy carbon electrodes (GCE), carbon paste electrodes (CPE), and screen-printed electrodes (SPE) are the main transductors modified with MOF for the electrochemical oxidation of glucose, and the maximum anodic peak current is taken to the analytical signal.
DOI: 10.1149/1945-7111/aced6f
Simultaneous Voltammetric Determination of Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) Using a Modified Carbon Paste Electrode and Chemometrics
Autores: Guadalupe Yoselin Aguilar-Lira, Jesús Eduardo López-Barriguete, Prisciliano Hernandez, Giaan Arturo Álvarez-Romero, Juan Manuel Gutiérrez
Fecha de publicación: 2023/6/30
Revista: Sensors
Editor: MDPI
Descripción: This work presents the simultaneous quantification of four non-steroidal anti-inflammatory drugs (NSAIDs), paracetamol, diclofenac, naproxen, and aspirin, in mixture solutions, by a laboratory-made working electrode based on carbon paste modified with multi-wall carbon nanotubes (MWCNT-CPE) and Differential Pulse Voltammetry (DPV). Preliminary electrochemical analysis was performed using cyclic voltammetry, and the sensor morphology was studied by scanning electronic microscopy and electrochemical impedance spectroscopy. The sample set ranging from 0.5 to 80 µmol L−1 was prepared using a complete factorial design (34) and considering some interferent species such as ascorbic acid, glucose, and sodium dodecyl sulfate to build the response model and an external randomly subset of samples within the experimental domain.
DOI: 10.3390/s23010421
Simple, fast and simultaneous determination of heavy metals in hair samples by SPE coupled with capillary electrophoresis
Autores: LC Medrano, G Islas, IS Ibarra, I Pérez-Silva, P Hernandez, JF Flores-Aguilar
Fecha de publicación: 2024/7/3
Revista: International Journal of Environmental Studies
Volumen: 81
Número: 4
Páginas: 1733-1746
Editor : Routledge
Descripción: A novel, simple, fast and sensitive method for the simultaneous analysis of heavy metals such as Cd(II), Cr(III), Co(II), Pb(II) and Cu(II) in hair samples based on complexometric method with EDTA and using solid-phase extraction with graphene oxide coupled with capillary electrophoresis has been developed. Under the optimised conditions, the proposed methodology had limits of detection from 5.7 to 16.8 µg kg−1 with intra- and inter-day repeatabilities <5% (in respect to relative standard deviation) in all cases. The proposed method was successfully employed for determination of heavy metals in the analysis of 20 hair samples. All samples were positive for at least one of the heavy metals studied with concentrations of 1.2 ± 1.0 mg kg−1 Cd(II), 7.2 ± 4.0 mg kg−1 Cr(III), 0.9 ± 0.8 mg kg−1 Co(II), 0.6 ± 0.2 mg kg−1 Pb(II) and 2.5 ± 0.3 mg kg−1 Cu(II).
DOI: https://doi.org/10.1080/00207233.2022.2115272
Development of a new voltammetric methodology for the determination of ciprofloxacin in beef samples using a carbon paste electrode modified with nafion and fullerenes
Autores: P Hernández, GY Aguilar‐Lira, G Islas, JA Rodriguez
Fecha de publicación: 2021/6
Revista: Electroanalysis
Volumen: 33
Número: 6
Páginas: 1539-1546
Descripción: A sensitive, selective, and low cost electrochemical new methodology was developed for the quantification of ciprofloxacin (Cip) in beef samples by cyclic voltammetry and differential pulse voltammetry, using a CPE electrode modified with Nafion and Fullerenes (N−F/CPE). The optimum parameters for the composition of the N−F/CPE electrode are 0.19 g mineral oil, 0.01 g Nafion, 50 μL fullerene, and graphite powder 0.3 g. The electrochemical characterization was carried out by obtaining maximum anodic peak current associated with the oxidation of ciprofloxacin at 1.1 V, where the electrochemical process resulted to be irreversible and diffusion‐controlled.
DOI: 10.1002/elan.202060525
Recovery of Cd (II) and Zn (II) from HCl medium using cellulose acetate sponges modified with Cyanex 923
Autores: Ma Elena Páez-Hernández, Carlos A Galan-Vidal, IS Ibarra, Prisciliano Hernandez, Irma Perez-Silva
Fecha de publicación: 2021/5/1
Revista: Desalination and Water Treatment
Volumen: 221
Páginas: 176-184
Editor : Elsevier
Descripción: In this work, it was studied the recovery of cadmium(II) and zinc(II) from hydrochloric acid solutions by cellulose acetate sponges modified with Cyanex 923® in batch system. Modified sponges (MS) were obtained from a recycled cellulosic man-made material (cigarette butts) that represent a major environmental contamination problem worldwide. MS were characterized using different techniques such as scanning electron microscopy and energy-dispersive X-ray spectroscopy. Some effective parameters on adsorption and recovery of both metals, such as the amount of Cyanex 923 in the test solution, mass of sponges, adsorption time, acidic chloride medium in adsorption, and recovery phase have been evaluated.
DOI: 10.5004/dwt.2021.27027