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Costa HRA, Santos AO, Teixeira YN, Silva MAS, Feitosa VA, Morais S, Oliveira TMBF. Exploring the Thermal-Oxidative Stability of Azithromycin Using a Thermoactivated Sensor Based on Cerium Molybdate and Multi-Walled Carbon Nanotubes. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:899. [PMID: 38869524 PMCID: PMC11173558 DOI: 10.3390/nano14110899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 05/07/2024] [Accepted: 05/17/2024] [Indexed: 06/14/2024]
Abstract
The chemical stability of azithromycin (AZM) may be compromised depending on the imposed thermo-oxidative conditions. This report addresses evidence of this process under varying conditions of temperature (20-80 °C), exposure time to UV radiation (1-3 h irradiation at 257 nm), and air saturation (1-3 h saturation with atmospheric air at 1.2 L min-1 and 15 kPa) through electrochemical measurements performed with a thermoactivated cerium molybdate (Ce2(MoO4)3)/multi-walled carbon nanotubes (MWCNT)-based composite electrode. Thermal treatment at 120 °C led to coordinated water elimination in Ce2(MoO4)3, improving its electrocatalytic effect on antibiotic oxidation, while MWCNT were essential to reduce the charge-transfer resistance and promote signal amplification. Theoretical-experimental data revealed remarkable reactivity for the irreversible oxidation of AZM on the working sensor using phosphate buffer (pH = 8) prepared in CH3OH/H2O (10:90%, v/v). Highly sensitive (230 nM detection limit) and precise (RSD < 4.0%) measurements were recorded under these conditions. The results also showed that AZM reduces its half-life as the temperature, exposure time to UV radiation, and air saturation increase. This fact reinforces the need for continuous quality control of AZM-based pharmaceuticals, using conditions closer to those observed during their transport and storage, reducing impacts on consumers' health.
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Affiliation(s)
- Heryka R. A. Costa
- Centro de Ciência e Tecnologia, Universidade Federal do Cariri, Av. Tenente Raimundo Rocha, 1639, Cidade Universitária, Juazeiro do Norte 63048-080, CE, Brazil; (H.R.A.C.); (A.O.S.); (Y.N.T.); (M.A.S.S.)
| | - André O. Santos
- Centro de Ciência e Tecnologia, Universidade Federal do Cariri, Av. Tenente Raimundo Rocha, 1639, Cidade Universitária, Juazeiro do Norte 63048-080, CE, Brazil; (H.R.A.C.); (A.O.S.); (Y.N.T.); (M.A.S.S.)
| | - Yago N. Teixeira
- Centro de Ciência e Tecnologia, Universidade Federal do Cariri, Av. Tenente Raimundo Rocha, 1639, Cidade Universitária, Juazeiro do Norte 63048-080, CE, Brazil; (H.R.A.C.); (A.O.S.); (Y.N.T.); (M.A.S.S.)
| | - Maria A. S. Silva
- Centro de Ciência e Tecnologia, Universidade Federal do Cariri, Av. Tenente Raimundo Rocha, 1639, Cidade Universitária, Juazeiro do Norte 63048-080, CE, Brazil; (H.R.A.C.); (A.O.S.); (Y.N.T.); (M.A.S.S.)
| | - Valker A. Feitosa
- Departamento de Tecnologia Bioquímico-Farmacêutica, Universidade de São Paulo, Av. Prof. Lineu Prestes, 580, Butantã, São Paulo 05508-000, SP, Brazil;
| | - Simone Morais
- REQUIMTE–LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. Bernardino de Almeida 431, Porto 4249-015, Portugal;
| | - Thiago M. B. F. Oliveira
- Centro de Ciência e Tecnologia, Universidade Federal do Cariri, Av. Tenente Raimundo Rocha, 1639, Cidade Universitária, Juazeiro do Norte 63048-080, CE, Brazil; (H.R.A.C.); (A.O.S.); (Y.N.T.); (M.A.S.S.)
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Ehirim T, Ozoemena OC, Mwonga PV, Haruna AB, Mofokeng TP, De Wael K, Ozoemena KI. Onion-like Carbons Provide a Favorable Electrocatalytic Platform for the Sensitive Detection of Tramadol Drug. ACS OMEGA 2022; 7:47892-47905. [PMID: 36591171 PMCID: PMC9798499 DOI: 10.1021/acsomega.2c05722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Accepted: 10/17/2022] [Indexed: 06/17/2023]
Abstract
This work reports the first study on the possible application of nanodiamond-derived onion-like carbons (OLCs), in comparison with conductive carbon black (CB), as an electrode platform for the electrocatalytic detection of tramadol (an important drug of abuse). The physicochemical properties of OLCs and CB were determined using X-ray diffraction (XRD), Raman, scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), and thermogravimetric analysis (TGA). The OLC exhibits, among others, higher surface area, more surface defects, and higher thermal stability than CB. From the electrochemical analysis (interrogated using cyclic voltammetry, differential pulse voltammetry, and electrochemical impedance spectroscopy), it is shown that an OLC-modified glassy carbon electrode (GCE-OLC) allows faster electron transport and electrocatalysis toward tramadol compared to a GCE-CB. To establish the underlying science behind the high performance of the OLC, theoretical calculations (density functional theory (DFT) simulations) were conducted. DFT predicts that OLC allows for weaker surface binding of tramadol (E ad = -26.656 eV) and faster kinetic energy (K.E. = -155.815 Ha) than CB (E ad = -40.174 eV and -305.322 Ha). The GCE-OLC shows a linear calibration curve for tramadol over the range of ∼55 to 392 μM, with high sensitivity (0.0315 μA/μM) and low limit of detection (LoD) and quantification (LoQ) (3.8 and 12.7 μM, respectively). The OLC-modified screen-printed electrode (SPE-OLC) was successfully applied for the sensitive detection of tramadol in real pharmaceutical formulations and human serum. The OLC-based electrochemical sensor promises to be useful for the sensitive and accurate detection of tramadol in clinics, quality control, and routine quantification of tramadol drugs in pharmaceutical formulations.
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Affiliation(s)
- Tobechukwu
J. Ehirim
- Molecular
Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg2050, South Africa
| | - Okoroike C. Ozoemena
- Molecular
Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg2050, South Africa
| | - Patrick V. Mwonga
- Molecular
Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg2050, South Africa
| | - Aderemi B. Haruna
- Molecular
Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg2050, South Africa
| | - Thapelo P. Mofokeng
- Molecular
Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg2050, South Africa
| | - Karolien De Wael
- A-Sense
Lab, Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, 2020Antwerp, Belgium
- NANOlab
Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020Antwerp, Belgium
| | - Kenneth I. Ozoemena
- Molecular
Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg2050, South Africa
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Zou X, Chen Y, Zheng Z, Sun M, Song X, Lin P, Tao J, Zhao P. The sensitive monitoring of living cell-secreted dopamine based on the electrochemical biosensor modified with nitrogen-doped graphene aerogel/Co3O4 nanoparticles. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Tailoring the structure and function of metal organic framework by chemical etching for diverse applications. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214699] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Atty SA, El-Hadi HRA, Eltanany BM, Zaazaa HE, Eissa MS. Analytical Eco-Scale for Evaluating the Uniqueness of Voltammetric Method used for Determination of Antiemetic Binary Mixture Containing Doxylamine Succinate in Presence of its Toxic Metabolite. Electrocatalysis (N Y) 2022. [DOI: 10.1007/s12678-022-00751-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
AbstractGreen analytical procedures are gaining popularity in the pharmaceutical research area as a way to reduce environmental impact and improve analyst health safety. The current work presents a green and sensitive electrochemical carbon paste electrode that has been chemically modified with zirconium dioxide and multi-walled carbon nanotubes for estimation of pyridoxine HCl (PYR) and doxylamine succinate (DOX) using the square wave voltammetric technique. Under optimum conditions, the linearity ranges were 20.00–2000.00 ng mL−1 and 2.00–20.00 µg mL−1 for both drugs in the 1st linear segment and 2nd linear segment, respectively. Stability testing assesses how the quality of a drug substance changes over time, depending on environmental and laboratory factors. DOX was found to undergo oxidative degradation when refluxed for 7 h using 30% H2O2 and the degraded product (DOX DEG) (toxic metabolite) was successfully characterized utilizing LC–MS. The developed electrode showed selectivity for the determination of binary mixture in pure form, pharmaceutical form, and in the presence of DOX DEG and common interfering molecules with good recovery. The proposed method was found to be eco-friendlier than the reported method in terms of the use of hazardous chemicals and solvents, energy consumption, and waste generation.
Graphical Abstract
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Ndebele N, Nyokong T. The Electrocatalytic Detection of Nitrite Using Manganese Schiff Base Phthalocyanine Complexes. Electrocatalysis (N Y) 2022. [DOI: 10.1007/s12678-022-00752-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kesavan G, Vinothkumar V, Chen SM, Thangadurai DT. Phosphorus-Doped Graphitic Carbon Nitride: A Metal-Free Electrocatalyst for Quercetin Sensing in Fruit samples. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Zine A, Ferkhi M, Khaled A, Kuyumcu Savan E. A2BO4±δ as New Materials for Electrocatalytic Detection of Paracetamol and Diclofenac Drugs. Electrocatalysis (N Y) 2022. [DOI: 10.1007/s12678-022-00745-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Balkourani G, Brouzgou A, Vecchio CL, Aricò A, Baglio V, Tsiakaras P. Selective electro-oxidation of dopamine on Co or Fe supported onto N-doped ketjenblack. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.139943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Construction of Electrochemical and Photoelectrochemical Sensing Platform Based on Porphyrinic Metal-Organic Frameworks for Determination of Ascorbic Acid. NANOMATERIALS 2022; 12:nano12030482. [PMID: 35159826 PMCID: PMC8839235 DOI: 10.3390/nano12030482] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 01/19/2022] [Accepted: 01/28/2022] [Indexed: 02/01/2023]
Abstract
Highly sensitive and specific detection of biomolecular markers is of great importance to the diagnosis and treatment of related diseases. Herein, Cu-TCPP@MOFs thin films were synthesized with tetrakis(4-carboxyphenyl) porphyrin (H2TCPP) as organic ligands and copper ions as metal nodes. The as-synthesized Cu-TCPP@MOFs thin films as electrode modifiers were used to modify the pre-treated glassy carbon electrode (GCE) and the electrochemical performances of Cu-TCPP@MOFs/GCE were evaluated by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). Furthermore, as the working electrode, the constructed Cu-TCPP@MOFs/GCE was used for the investigation of ascorbic acid (AA) due to its outstanding electrocatalytic activities towards AA by several electrochemical methods, including cyclic voltammetry (CV), differential pulse voltammetry (DPV), and chronoamperometry (CA). The well-linear relationship was established based on different AA concentration ranges and the ideal detection limits (LOD) were obtained in the above-mentioned electrochemical methods, respectively. Furthermore, a Cu-TCPP MOFs@GCE sensing platform was used as a photoelectrochemical (PEC) sensor to quantitatively detect AA based on the strong absorption properties of Cu-TCPP ingredients in Cu-TCPP MOFs in a visible light band of 400~700 nm. PEC sensing platform based on Cu-TCPP@MOFs exhibited a more extensive linear concentration range, more ideal detection limit, and better sensitivity relative than the other electrochemical methods for AA. The well linear regression equations were established between the peak current intensity and AA concentrations in different electrochemical technologies, including CV, DPV, and CA, and PEC technology. AA concentration ranges applicable to various electrochemical equations were as follows: 0.45~2.10 mM of CV, 0.75~2.025 mM of DPV, 0.3~2.4 mM of CA, 7.5~480 μM of PEC, and the corresponding detection limits for AA were 1.08 μM (S/N = 3), 0.14 μM (S/N = 3), 0.049 μM (S/N = 3), and 0.084 nA/μM. Moreover, the proposed Cu-TCPP MOFs@GCE electrochemical and photoelectrochemical sensing platform was applied to determine the AA concentration of a real human serum sample; the results reveal that Cu-TCPP MOFs@GCE sensing platform could accurately determine the concentration of AA of the human serum under other potential interferences contained in the human serum samples.
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Ipadeola AK, Haruna AB, Gaolatlhe L, Lebechi AK, Meng J, Pang Q, Eid K, Abdullah AM, Ozoemena KI. Efforts at Enhancing Bifunctional Electrocatalysis and Related Events for Rechargeable Zinc‐Air Batteries. ChemElectroChem 2021. [DOI: 10.1002/celc.202100574] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Adewale K. Ipadeola
- Molecular Sciences Institute, School of Chemistry University of the Witwatersrand Private Bag 3, PO Wits Johannesburg 2050 South Africa
| | - Aderemi B. Haruna
- Molecular Sciences Institute, School of Chemistry University of the Witwatersrand Private Bag 3, PO Wits Johannesburg 2050 South Africa
| | - Lesego Gaolatlhe
- Molecular Sciences Institute, School of Chemistry University of the Witwatersrand Private Bag 3, PO Wits Johannesburg 2050 South Africa
| | - Augustus K. Lebechi
- Molecular Sciences Institute, School of Chemistry University of the Witwatersrand Private Bag 3, PO Wits Johannesburg 2050 South Africa
| | - Jiashen Meng
- School of Materials Science and Engineering Peking University Beijing 100871 China
| | - Quanquan Pang
- School of Materials Science and Engineering Peking University Beijing 100871 China
| | - Kamel Eid
- Gas Processing Centre, College of Engineering Qatar University Doha 2713 Qatar
| | - Aboubakr M. Abdullah
- Centre for Advanced Materials, College of Engineering Qatar University Doha 2713 Qatar
| | - Kenneth I. Ozoemena
- Molecular Sciences Institute, School of Chemistry University of the Witwatersrand Private Bag 3, PO Wits Johannesburg 2050 South Africa
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Ozoemena OC, Ehirim TJ, Khawula T, Makgopa K, Shai LJ, Ozoemena KI. Bovine Serum Albumin-Dependent Charge-Transfer Kinetics Controls the Electrochemical Immunosensitive Detection: Vibrio cholerae as a Model Bioanalyte. Electrocatalysis (N Y) 2021; 12:595-604. [PMID: 34122666 PMCID: PMC8187457 DOI: 10.1007/s12678-021-00673-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/26/2021] [Indexed: 11/25/2022]
Abstract
This work investigates how bovine serum albumin (BSA), a commonly used protein in the fabrication of electrochemical immunosensors, can impact on the sensitivity of detection when integrated with antibody (Ab) pre-encapsulated with (i) insulating polyacrylonitrile (PAN) fibre (i.e., GCE-PAN-Ab-BSA immunosensor) or (ii) conducting PAN-grafted iron (II) phthalocyanine (FePc) (i.e., GCE-PAN@FePc-Ab-BSA immunosensor), using Vibrio cholerae toxin as a case study bioanalyte. Both immunosensors show different charge-transfer kinetics that strongly impact on their immunosensitive detection. From the electrochemical data, GCE-PAN-Ab-BSA is more insulating with the presence of BSA, while the GCE-PAN@FePc-Ab-BSA is more conducting with BSA. The CV of the GCE-PAN-Ab-BSA is dominated by radial diffusion process, while that of the GCE-PAN@FePc-Ab-BSA is planar diffusion process. The behaviour of GCE-PAN@FePc-Ab-BSA has been associated with the facile coordination of BSA and FePc that permits co-operative charge-transport of the redox probe, while that of the GCE-PAN-Ab-BSA is related to the interaction-induced PAN-BSA insulating state that suppresses charge-transport. As a consequence of these different interaction processes, GCE-PAN-Ab-BSA immunosensor provides higher electroanalytical performance for the detection of Vibrio cholerae toxin (with sensitivity of 16.12 Ω/log [VCT, g/mL] and limit of detection (LoD) of 3.20 × 10-13 g/mL compared to those of the GCE-PAN@FePc-Ab-BSA (4.16 Ω/log (VCT, g mL-1) and 2.00 × 10-12 g/mL). The study confirms the need for a thorough understanding of the physico-chemistries of the electrode platforms for the construction of immunosensors. Although this work is on immunosensors for cholera infection, it may well apply to other immunosensors. GRAPHICAL ABSTRACT
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Affiliation(s)
- Okoroike C. Ozoemena
- Department of Biomedical Sciences, Faculty of Science, Tshwane University of Technology, Pretoria, 0001 South Africa
| | - Tobechukwu J. Ehirim
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg, 2050 South Africa
| | - Tobile Khawula
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg, 2050 South Africa
| | - Katlego Makgopa
- Department of Chemistry, Faculty of Science, Tshwane University of Technology, Pretoria, 0001 South Africa
| | - Leshweni J. Shai
- Department of Biomedical Sciences, Faculty of Science, Tshwane University of Technology, Pretoria, 0001 South Africa
| | - Kenneth I. Ozoemena
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg, 2050 South Africa
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Onion-like carbon re-inforced electrospun polyacrylonitrile fibres for ultrasensitive electrochemical immunosensing of Vibrio cholerae toxin. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136816] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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