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Galvão JCR, Araujo MDS, Prete MC, Neto VL, Dall’Antonia LH, Matos R, Tarley CRT, Medeiros RA. Electrochemical Determination of 17-β-Estradiol Using a Glassy Carbon Electrode Modified with α-Fe 2O 3 Nanoparticles Supported on Carbon Nanotubes. Molecules 2023; 28:6372. [PMID: 37687201 PMCID: PMC10489867 DOI: 10.3390/molecules28176372] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 08/22/2023] [Accepted: 08/28/2023] [Indexed: 09/10/2023] Open
Abstract
In this study, a novel electrochemical assay for determining 17-β-estradiol (E2) was proposed. The approach involves modifying a glassy carbon electrode (GCE) with a nanocomposite consisting of α-Fe2O3 nanoparticles supported on carbon nanotubes (CNTs)-denoted as α-Fe2O3-CNT/GCE. The synthesis of the α-Fe2O3-CNT nanocomposite was achieved through a simple and cost-effective hydrothermal process. Morphological and chemical characterization were conducted using scanning electron microscopy (SEM), Raman spectroscopy, and energy-dispersive X-ray spectroscopy (EDX). The presence of the α-Fe2O3-CNT film on the GCE surface resulted in an enhanced electrochemical response to E2, preventing electrode surface fouling and mitigating the decrease in peak current intensity during E2 oxidation. These outcomes substantiate the rationale behind the GCE modification. After the optimization of experimental conditions, E2 was determined by the square wave voltammetry technique using 0.1 mol L-1 KCl solution (pH = 7.0) with 20% ethanol as a supporting electrolyte. A linear concentration range of 5.0-100.0 nmol L-1 and a low limit of detection of 4.4 nmol L-1 were obtained. The electroanalytical method using α-Fe2O3-CNT/GCE was applied for E2 determination in pharmaceutical, lake water, and synthetic urine samples. The obtained results were attested by recovery tests and by high-performance liquid chromatography as a comparative technique at a 95% confidence level. Thus, the developed electrochemical sensor is simple and fast to obtain, presents high accuracy, and is viable for determining E2 in routine analysis.
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Affiliation(s)
| | | | | | | | | | | | | | - Roberta Antigo Medeiros
- Department of Chemistry, State University of Londrina, Londrina 86057-970, PR, Brazil; (J.C.R.G.); (M.d.S.A.); (M.C.P.); (V.L.N.); (L.H.D.); (R.M.); (C.R.T.T.)
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2
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Smajdor J, Paczosa-Bator B, Grabarczyk M, Piech R. Glassy Carbon Electrode Modified with CB/TiO 2 Layer for Sensitive Determination of Sumatriptan by Means of Voltammetry and Flow Injection Analysis. SENSORS (BASEL, SWITZERLAND) 2023; 23:5397. [PMID: 37420564 DOI: 10.3390/s23125397] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 06/02/2023] [Accepted: 06/05/2023] [Indexed: 07/09/2023]
Abstract
Sumatriptan is an organic chemical compound from the tryptamine group. It is used as a medicine for migraine attacks and in the treatment of cluster headaches. In this work, a new voltammetric method is proposed for highly sensitive SUM determination, using glassy carbon electrodes modified with carbon black and titanium dioxide suspension. The novelty of the presented work is the usage of the mixture of carbon black and TiO2 as glassy carbon electrode modifier for the first time for SUM determination. The mentioned sensor was characterized by great repeatability and sensitivity of measurements, which resulted in the obtention of a wide range of linearity and a low detection limit. The electrochemical properties of the CB-TiO2/GC sensor was characterized using the LSV and EIS method. The effect of different factors on the SUM peak, such as supporting electrolyte type, preconcentration time and potential, or influence of interferents, were tested using the square wave voltammetry technique. The linear voltammetric response for the analyte was obtained in the concentration range of 5 nmol L-1 to 150 μmol L-1 with a detection limit of 2.9 nmol L-1 for a preconcentration time of 150 s in the 0.1 mol L-1 phosphate buffer pH 6.0. The proposed method was successfully applied for highly sensitive sumatriptan determination in complex matrices, such as tablets, urine, and plasma, with a good recovery parameter (94-105%). The presented CB-TiO2/GC electrode is characterized by great stability, it was used for 6 weeks without significant changes in the SUM peak current. Amperometric and voltammetric measurements of SUM under the flow injection conditions were also performed to indicate the possibility of its fast and accurate determination with a time of single analysis of approx. 30 s.
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Affiliation(s)
- Joanna Smajdor
- Department of Analytical Chemistry and Biochemistry, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Al. Mickiewicza, 30-059 Krakow, Poland
| | - Beata Paczosa-Bator
- Department of Analytical Chemistry and Biochemistry, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Al. Mickiewicza, 30-059 Krakow, Poland
| | - Małgorzata Grabarczyk
- Department of Analytical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, Maria Curie-Sklodowska Sq. 3, 20-031 Lublin, Poland
| | - Robert Piech
- Department of Analytical Chemistry and Biochemistry, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Al. Mickiewicza, 30-059 Krakow, Poland
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Musa AM, Kiely J, Luxton R, Honeychurch KC. An Electrochemical Screen-Printed Sensor Based on Gold-Nanoparticle-Decorated Reduced Graphene Oxide-Carbon Nanotubes Composites for the Determination of 17-β Estradiol. BIOSENSORS 2023; 13:bios13040491. [PMID: 37185565 PMCID: PMC10136424 DOI: 10.3390/bios13040491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 04/07/2023] [Accepted: 04/10/2023] [Indexed: 05/17/2023]
Abstract
In this study, a screen-printed electrode (SPE) modified with gold-nanoparticle-decorated reduced graphene oxide-carbon nanotubes (rGO-AuNPs/CNT/SPE) was used for the determination of estradiol (E2). The AuNPs were produced through an eco-friendly method utilising plant extract, eliminating the need for severe chemicals, and remove the requirements of sophisticated fabrication methods and tedious procedures. In addition, rGO-AuNP serves as a dispersant for the CNT to improve the dispersion stability of CNTs. The composite material, rGO-AuNPs/CNT, underwent characterisation through scanning electron microscopy (SEM), ultraviolet-visible absorption spectroscopy (UV-vis), Fourier-transform infrared (FTIR) spectroscopy, and atomic force microscopy (AFM). The electrochemical performance of the modified SPE for estradiol oxidation was characterised using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques. The rGO-AuNPs/CNT/SPE exhibited a notable improvement compared to bare/SPE and GO-CNT/SPE, as evidenced by the relative peak currents. Additionally, we employed a baseline correction algorithm to accurately adjust the sensor response while eliminating extraneous background components that are typically present in voltammetric experiments. The optimised estradiol sensor offers linear sensitivity from 0.05-1.00 µM, with a detection limit of 3 nM based on three times the standard deviation (3δ). Notably, this sensing approach yields stable, repeatable, and reproducible outcomes. Assessment of drinking water samples indicated an average recovery rate of 97.5% for samples enriched with E2 at concentrations as low as 0.5 µM%, accompanied by only a modest coefficient of variation (%CV) value of 2.7%.
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Affiliation(s)
- Auwal M Musa
- Institute of Bio-Sensing Technology (IBST), University of the West of England, Bristol BS16 1QY, UK
| | - Janice Kiely
- Centre for Research in Biosciences (CRIB), School of Applied Sciences, University of the West of England, Bristol BS16 1QY, UK
| | - Richard Luxton
- Centre for Research in Biosciences (CRIB), School of Applied Sciences, University of the West of England, Bristol BS16 1QY, UK
| | - Kevin C Honeychurch
- Institute of Bio-Sensing Technology (IBST), University of the West of England, Bristol BS16 1QY, UK
- Centre for Research in Biosciences (CRIB), School of Applied Sciences, University of the West of England, Bristol BS16 1QY, UK
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Høj PH, Møller-Sørensen J, Wissing AL, Alatraktchi FA. Electrochemical biosensors for monitoring of selected pregnancy hormones during the first trimester: A systematic review. Talanta 2023; 258:124396. [PMID: 36870154 DOI: 10.1016/j.talanta.2023.124396] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 02/20/2023] [Accepted: 02/23/2023] [Indexed: 02/27/2023]
Abstract
The hormones human chorionic gonadotropin, progesterone, estrogen and four of its metabolites (estradiol, estrone, estriol, estetrol), as well as relaxin play an essential role in the development of the fetus during the first trimester. Imbalances in these hormones during the first trimester have been directly linked to miscarriages. However, frequent monitoring of the hormones is limited by the current conventional centralized analytical tools that do not allow a rapid response time. Electrochemical sensing is considered an ideal tool to detect hormones owing to its advantages such as quick response, user-friendliness, low economic costs, and possibility of use in point-of-care settings. Electrochemical detection of pregnancy hormones is an emerging field that has been demonstrated primarily at research level. Thus, it is timely with a comprehensive overview of the characteristics of the reported detection techniques. This is the first extensive review focusing on the advances related to electrochemical detection of hormones linked to the first trimester of pregnancy. Additionally, this review offers insights into the main challenges that must be addressed imminently to ensure progress from research to clinical applications.
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Affiliation(s)
- Pernille Hagen Høj
- Department of Science and Environment, Roskilde University, Roskilde, Denmark
| | - Jon Møller-Sørensen
- Department of Science and Environment, Roskilde University, Roskilde, Denmark
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Cardoso RM, Pereira TS, Santos DMD, Migliorini FL, Mattoso LH, Correa DS. Laser-induced graphitized electrodes enabled by a 3D printer/diode laser setup for voltammetric detection of hormones. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.141874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Development of a Chemically Modified Electrode with Magnetic Molecularly Imprinted Polymer (MagMIP) for 17-β-Estradiol Determination in Water Samples. ELECTROCHEM 2022. [DOI: 10.3390/electrochem3040053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The present work consisted of the development of an electrode based on carbon paste modified with magnetic molecularly imprinted polymer (CPE-MagMIP) for 17-β-estradiol (E2) detection. The incorporation of magnetic material (MagMIP) improved sensor performance, an increase of over 317%. The proposed method resulted in a linear response range from 0.5 to 14.0 μM, and the detection limit (LOD) and quantification limit (LOQ) were equal to 0.13 and 0.44 μM, respectively. Under optimized conditions, the developed sensor obtained satisfactory parameters in E2 determination in water samples, demonstrating selectivity, accuracy, and precision, making it a promising method for monitoring E2 in environmental samples.
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Smajdor J, Paczosa-Bator B, Piech R. Advances on Hormones and Steroids Determination: A Review of Voltammetric Methods since 2000. MEMBRANES 2022; 12:1225. [PMID: 36557132 PMCID: PMC9782681 DOI: 10.3390/membranes12121225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/18/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
This article presents advances in the electrochemical determination of hormones and steroids since 2000. A wide spectrum of techniques and working electrodes have been involved in the reported measurements in order to obtain the lowest possible limits of detection. The voltammetric and polarographic techniques, due to their sensitivity and easiness, could be used as alternatives to other, more complicated, analytical assays. Still, growing interest in designing a new construction of the working electrodes enables us to prepare new measurement procedures and obtain lower limits of detection. A brief description of the measured compounds has been presented, along with a comparison of the obtained results.
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Ferreira LMC, Silva PS, Augusto KKL, Gomes-Júnior PC, Farra SOD, Silva TA, Fatibello-Filho O, Vicentini FC. Using nanostructured carbon black-based electrochemical (bio)sensors for pharmaceutical and biomedical analyses: A comprehensive review. J Pharm Biomed Anal 2022; 221:115032. [PMID: 36152488 DOI: 10.1016/j.jpba.2022.115032] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/28/2022] [Accepted: 09/05/2022] [Indexed: 11/19/2022]
Abstract
The outstanding electronic properties of carbon black (CB) and its economic advantages have fueled its application as nanostructured electrode material for the development of new electrochemical sensors and biosensors. CB-based electrochemical sensing devices have been found to exhibit high surface area, fast charge transfer kinetics, and excellent functionalization. In the present work, we set forth a comprehensive review of the recent advances made in the development and application of CB-based electrochemical devices for pharmaceutical and biomedical analyses - from quantitative monitoring of drug formulations to clinical diagnoses - and the underlying challenges and constraints that need to be overcome. We also present a thorough discussion about the strategies and techniques employed in the development of new electrochemical sensing platforms and in the enhancement of their analytical properties and biocompatibility for anchoring active biomolecules, as well as the combination of these sensing devices with other materials aiming at boosting the performance and efficiency of the sensors.
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Affiliation(s)
- Luís M C Ferreira
- Center of Nature Sciences, Federal University of São Carlos, Rod. Lauri Simões de Barros km 12, 18290-000 Buri, SP, Brazil
| | - Patrícia S Silva
- Department of Chemistry, Federal University of Viçosa, 36570-900 Viçosa, MG, Brazil
| | - Karen K L Augusto
- Department of Chemistry, Federal University of São Carlos, Rod. Washington Luís km 235, São Carlos, SP, Brazil
| | - Paulo C Gomes-Júnior
- Department of Chemistry, Federal University of São Carlos, Rod. Washington Luís km 235, São Carlos, SP, Brazil
| | - Sinara O D Farra
- Center of Nature Sciences, Federal University of São Carlos, Rod. Lauri Simões de Barros km 12, 18290-000 Buri, SP, Brazil
| | - Tiago A Silva
- Department of Chemistry, Federal University of Viçosa, 36570-900 Viçosa, MG, Brazil
| | - Orlando Fatibello-Filho
- Department of Chemistry, Federal University of São Carlos, Rod. Washington Luís km 235, São Carlos, SP, Brazil
| | - Fernando C Vicentini
- Center of Nature Sciences, Federal University of São Carlos, Rod. Lauri Simões de Barros km 12, 18290-000 Buri, SP, Brazil.
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da Silva DN, Pereira AC. An electrochemical sensor modified with a molecularly imprinted polymer and carbon black for 17-β-estradiol detection. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:1208-1213. [PMID: 35234224 DOI: 10.1039/d1ay02062e] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The purpose of this work was to apply an electrochemical sensor modified with a molecularly imprinted polymer (MIP) and carbon black (CB) for 17β-estradiol (E2) detection in river water samples. The synthesized MIP was characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM).The modification of the electrode with the MIP and CB contributed to increased sensitivity, an increase of over 173% in relation to that of the bare electrode. The experimental parameters, amount of modifiers, pH and possible interfering species were evaluated. The method showed linearity from 0.10 to 23.0 μmol L-1 and detection and quantification limits of 0.03 and 0.10 μmol L-1, respectively. The application of the developed sensor was considered simple, resulting in a fast, low operating cost method, with recovery values between 103 and 105%.
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Affiliation(s)
- Daniela Nunes da Silva
- Departamento de Ciências Naturais, Universidade Federal de São João Del Rei (UFSJ), Campus Dom Bosco, Praça Dom Helvécio 74, Fá-bricas, 36301-160, São João del Rei, MG, Brazil.
| | - Arnaldo César Pereira
- Departamento de Ciências Naturais, Universidade Federal de São João Del Rei (UFSJ), Campus Dom Bosco, Praça Dom Helvécio 74, Fá-bricas, 36301-160, São João del Rei, MG, Brazil.
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10
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Functional Nanomaterials Based Opto-Electrochemical Sensors for the Detection of Gonadal Steroid Hormones. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116571] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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11
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Nimesulide Determination on Carbon Black-Nafion Modified Glassy Carbon Electrode by Means of Adsorptive Stripping Voltammetry. Electrocatalysis (N Y) 2021. [DOI: 10.1007/s12678-021-00676-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
AbstractAdsorptive Stripping Voltammetric method for Nimesulide (NIM) determination was developed. As a working electrode, glassy carbon electrode (GCE) modified with carbon black and Nafion (CB-Nafion GCE) was used. All measurements were carried out in 0.1 M acetate buffer (pH 4.6). Conducted experiments allowed to optimize differential pulse voltammetry (DPV) instrumental parameters: sampling and waiting time ts = tw = 10 ms, step potential Es = 4 mV, and pulse amplitude ΔE = 50 mV. The best results were obtained for preconcentration potential and time equal to 400 mV and 20 s, respectively. Limit of detection was calculated and was equal to 0.14 µM for 20-s preconcentration time and 0.06 µM for 40-s preconcentration time. In order to prove the applicability of the developed method, concentration of nimesulide in pharmaceutical products was determined. Calculated recoveries were in the range 94–99%, which indicates that the method might be assumed as accurate. Coefficient of variation was equal to 5.0% (n = 7, NIM concentration 1 µM) Obtained results of NIM determination were in good agreement with the content declared by producers.
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Application of botryosphaeran as a carbon black adherent on a glassy carbon electrode for the electrochemical determination of cyclobenzaprine. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138176] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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13
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Marques GL, Rocha LR, Prete MC, Gorla FA, Moscardi dos Santos D, Segatelli MG, Teixeira Tarley CR. Development of Electrochemical Platform Based on Molecularly Imprinted Poly(methacrylic acid) Grafted on Iniferter‐modified Carbon Nanotubes for 17β‐Estradiol Determination in Water Samples. ELECTROANAL 2020. [DOI: 10.1002/elan.202060270] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Gabriel Lopes Marques
- Departamento de Química Universidade Estadual de Londrina Rod. Celso Garcia Cid, PR 445 Km 380, Campus Universitário Londrina PR, CEP 86051-990 Brazil
| | - Luana Rianne Rocha
- Departamento de Química Universidade Estadual de Londrina Rod. Celso Garcia Cid, PR 445 Km 380, Campus Universitário Londrina PR, CEP 86051-990 Brazil
| | - Maiyara Carolyne Prete
- Departamento de Química Universidade Estadual de Londrina Rod. Celso Garcia Cid, PR 445 Km 380, Campus Universitário Londrina PR, CEP 86051-990 Brazil
| | - Felipe Augusto Gorla
- Departamento de Química Universidade Estadual de Londrina Rod. Celso Garcia Cid, PR 445 Km 380, Campus Universitário Londrina PR, CEP 86051-990 Brazil
- Campus Assis Chateaubriand Instituto Federal do Paraná Avenida Cívica 475, Centro Cívico Assis Chateaubriand PR, CEP 85935–000 Brazil
| | - Dayana Moscardi dos Santos
- Departamento de Química Universidade Estadual de Londrina Rod. Celso Garcia Cid, PR 445 Km 380, Campus Universitário Londrina PR, CEP 86051-990 Brazil
| | - Mariana Gava Segatelli
- Departamento de Química Universidade Estadual de Londrina Rod. Celso Garcia Cid, PR 445 Km 380, Campus Universitário Londrina PR, CEP 86051-990 Brazil
| | - César Ricardo Teixeira Tarley
- Departamento de Química Universidade Estadual de Londrina Rod. Celso Garcia Cid, PR 445 Km 380, Campus Universitário Londrina PR, CEP 86051-990 Brazil
- Instituto Nacional de Ciência e Tecnologia (INCT) de Bioanalítica Universidade Estadual de Campinas (UNICAMP) Instituto de Química Departamento de Química Analítica, Cidade Universitária Zeferino Vaz s/n, CEP 13083–970 Campinas SP Brazil
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Nunes da Silva D, Leijoto de Oliveira H, Borges KB, Pereira AC. Sensitive Determination of 17β‐Estradiol using a Magneto Sensor Based on Magnetic Molecularly Imprinted Polymer. ELECTROANAL 2020. [DOI: 10.1002/elan.202060223] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Daniela Nunes da Silva
- Departamento de Ciências Naturais Universidade Federal de São João del-Rei (UFSJ) Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas 36301-160 São João del-Rei MG Brazil
| | - Hanna Leijoto de Oliveira
- Departamento de Ciências Naturais Universidade Federal de São João del-Rei (UFSJ) Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas 36301-160 São João del-Rei MG Brazil
| | - Keyller Bastos Borges
- Departamento de Ciências Naturais Universidade Federal de São João del-Rei (UFSJ) Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas 36301-160 São João del-Rei MG Brazil
| | - Arnaldo César Pereira
- Departamento de Ciências Naturais Universidade Federal de São João del-Rei (UFSJ) Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas 36301-160 São João del-Rei MG Brazil
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Liquid Contact-Selective Potentiometric Sensor Based on Imprinted Polymeric Beads Towards 17β-Estradiol Determination. Polymers (Basel) 2020; 12:polym12071506. [PMID: 32645900 PMCID: PMC7407799 DOI: 10.3390/polym12071506] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 06/26/2020] [Accepted: 07/02/2020] [Indexed: 11/18/2022] Open
Abstract
Novel potentiometric devices “ion-selective electrodes (ISEs)” were designed and characterized for the detection of 17β-estradiol (EST) hormone. The selective membranes were based on the use of man-tailored biomimics (i.e., molecularly imprinted polymers (MIPs)) as recognition ionophores. The synthesized MIPs include a functional monomer (methacrylic acid (MAA)) and a cross-linker (ethylene glycol dimethacrylic acid (EGDMA)) in their preparation. Changes in the membrane potential induced by the dissociated 17β-estradiol were investigated in 50 mM CO32−/HCO3− buffer solution at pH 10.5. The ion-selective electrodes (ISEs) exhibited fast response and good sensitivity towards 17β-estradiol with a limit of detection 1.5 µM over a linear range starts from 2.5 µM with an anionic response of 61.2 ± 1.2 mV/decade. The selectivity pattern of the proposed ISEs was also evaluated and revealed an enhanced selectivity towards EST over several phenolic compounds. Advantages revealed by the presented sensor (i.e., wide range of assay, enhanced accuracy and precision, low limit of detection, good selectivity, long-term potential stability, rapid response and long life-span and absence of any sample pretreatment steps) suggest its use in routine quality control/quality assurance tests. They were successfully applied to estradiol determination in biological fluids and in different pharmaceutical preparations collected from the local market.
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Górska A, Paczosa‐Bator B, Wyrwa J, Piech R. New Electrochemical Sensor of Prolonged Application for Metformin Determination Based on Hydrated Ruthenium Dioxide‐Carbon Black‐Nafion Modified Glassy Carbon Electrode. ELECTROANAL 2020. [DOI: 10.1002/elan.202060012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Anna Górska
- Faculty of Materials Science and CeramicsAGH University of Science and Technology 30-059 Kraków, al. Mickiewicza 30 Poland
| | - Beata Paczosa‐Bator
- Faculty of Materials Science and CeramicsAGH University of Science and Technology 30-059 Kraków, al. Mickiewicza 30 Poland
| | - Jan Wyrwa
- Faculty of Materials Science and CeramicsAGH University of Science and Technology 30-059 Kraków, al. Mickiewicza 30 Poland
| | - Robert Piech
- Faculty of Materials Science and CeramicsAGH University of Science and Technology 30-059 Kraków, al. Mickiewicza 30 Poland
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Abstract
The role of the analytical methods and their validations has been important in quantification of drugs from their
dosage forms or biological samples in recent years. Development of analytical methodscoupled with each other, is useful
for the investigation of behavior of drugs or metabolites or impurities, and is also a useful tool for sensitive detections.
The recent roles of spectroscopy, chromatography, titrimetry, electrochemistry and capillary electrophoresis have been
explained here.
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Affiliation(s)
- Nurgul K. Bakirhan
- Department of Analytical Chemistry, Gulhane Faculty of Pharmacy, University of Health Science, Etlik, Ankara, Turkey
| | - Sibel A. Ozkan
- Department of Analytical Chemistry, Faculty of Pharmacy, Ankara University, Ankara, Turkey
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18
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Rahman MM, Alam M, Asiri AM. Carbon black co-adsorbed ZnO nanocomposites for selective benzaldehyde sensor development by electrochemical approach for environmental safety. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2018.04.041] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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