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Ai Y, Yang C, Yin Z, Wang T, Gai T, Feng J, Li K, Zhang W, Li Y, Wang F, Chao D, Wang Y, Zhao D, Li W. Biomimetic Superstructured Interphase for Aqueous Zinc-Ion Batteries. J Am Chem Soc 2024; 146:15496-15505. [PMID: 38785353 DOI: 10.1021/jacs.4c03943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
The practical application of aqueous zinc-ion batteries (AZIBs) is greatly challenged by rampant dendrites and pestilent side reactions resulting from an unstable Zn-electrolyte interphase. Herein, we report the construction of a reliable superstructured solid electrolyte interphase for stable Zn anodes by using mesoporous polydopamine (2D-mPDA) platelets as building blocks. The interphase shows a biomimetic nacre's "brick-and-mortar" structure and artificial transmembrane channels of hexagonally ordered mesopores in the plane, overcoming the mechanical robustness and ionic conductivity trade-off. Experimental results and simulations reveal that the -OH and -NH groups on the surface of artificial ion channels can promote rapid desolvation kinetics and serve as an ion sieve to homogenize the Zn2+ flux, thus inhibiting side reactions and ensuring uniform Zn deposition without dendrites. The 2D-mPDA@Zn electrode achieves an ultralow nucleation potential of 35 mV and maintains a Coulombic efficiency of 99.8% over 1500 cycles at 5 mA cm-2. Moreover, the symmetric battery exhibits a prolonged lifespan of over 580 h at a high current density of 20 mA cm-2. This biomimetic superstructured interphase also demonstrates the high feasibility in Zn//VO2 full cells and paves a new route for rechargeable aqueous metal-ion batteries.
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Affiliation(s)
- Yan Ai
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, and iChEM, Fudan University, Shanghai 200433, P. R. China
| | - Chaochao Yang
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, and iChEM, Fudan University, Shanghai 200433, P. R. China
| | - Ziqing Yin
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, and iChEM, Fudan University, Shanghai 200433, P. R. China
| | - Tong Wang
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, and iChEM, Fudan University, Shanghai 200433, P. R. China
| | - Tianyu Gai
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, and iChEM, Fudan University, Shanghai 200433, P. R. China
| | - Jiayou Feng
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, and iChEM, Fudan University, Shanghai 200433, P. R. China
| | - Kailin Li
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, and iChEM, Fudan University, Shanghai 200433, P. R. China
| | - Wei Zhang
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, and iChEM, Fudan University, Shanghai 200433, P. R. China
| | - Yefei Li
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, and iChEM, Fudan University, Shanghai 200433, P. R. China
| | - Fei Wang
- Department of Materials Science, Fudan University, Shanghai 200433, P. R. China
| | - Dongliang Chao
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, and iChEM, Fudan University, Shanghai 200433, P. R. China
| | - Yonggang Wang
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, and iChEM, Fudan University, Shanghai 200433, P. R. China
| | - Dongyuan Zhao
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, and iChEM, Fudan University, Shanghai 200433, P. R. China
| | - Wei Li
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, and iChEM, Fudan University, Shanghai 200433, P. R. China
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Abbasi Majd S, Kashanian S, Shekarbeygi Z, Babaei M. Simultaneous sensing of carbidopa and levodopa by a novel strategy based on dual-emission ratiometric assay of modified carbon dots. Biotechnol Appl Biochem 2024. [PMID: 38728602 DOI: 10.1002/bab.2595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 04/20/2024] [Indexed: 05/12/2024]
Abstract
Rapid control of the content of Parkinson's drugs in biological fluids and pharmaceutical formulations is of great importance because changes in the concentration of these drugs affect their bioavailability and biopharmaceutical properties. Therefore, we presented a simple and convenient method for the ratiometric detection of carbidopa and levodopa for carbon dots (CDs) dual-fluorescent emission. Dual-emission CDs were prepared from chitosan using a microwave method, following which the surface was chemically modified with terephthalaldehyde. CDs had two strong well-separated peaks at 445 and 510 nm. The relative measurement of carbidopa and levodopa was based on the static extinction of CDs at 445 nm and increase at 510 nm, respectively. The linear range for carbidopa measurement was 2.5-300 nM, with a limit of detection (LOD) of 2.1 nM, and a relative standard deviation (RSD) of 1.68%. Further, the linear range for levodopa measurement was equal to 3.0-400 nM, with LOD and RSD% of 2.8 nM and 3.5%, respectively. Also, selectivity of ratiometric sensor in the presence of interferences was investigated, which showed that the recovery of carbidopa and levodopa in serum and urine samples has changed between 96.80% and 116.24% with RSD% 0.11-0.77. CDs also provided good results for the determination of carbidopa and levodopa in real samples, and had high selectivity in the presence of possible interferences.
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Affiliation(s)
- Sasan Abbasi Majd
- Department of Applied Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran
| | - Soheila Kashanian
- Faculty of Chemistry, Sensor and Biosensor Research Center (SBRC), Razi University, Kermanshah, Iran
- Nanobiotechnology Department, Faculty of Innovative Science and Technology, Razi University, Kermanshah, Iran
| | - Zahra Shekarbeygi
- Nano Drug Delivery Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mahsa Babaei
- Department of Biology, Faculty of Science, Razi University, Kermanshah, Iran
- Department of Biology, Faculty of Sciences, Arak University, Arak, Iran
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Actis Dato AB, Martinez VR, Velez Rueda JO, Portiansky EL, De Giusti V, Ferrer EG, Williams PAM. Improvement of the cardiovascular effect of methyldopa by complexation with Zn(II): Synthesis, characterization and mechanism of action. J Trace Elem Med Biol 2024; 81:127327. [PMID: 37890445 DOI: 10.1016/j.jtemb.2023.127327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 10/03/2023] [Accepted: 10/19/2023] [Indexed: 10/29/2023]
Abstract
BACKGROUND the antihypertensive drug α-methyldopa (MD) stands as one of the extensively used medications for managing hypertension during pregnancy. Zinc deprivation has been associated with many diseases. In this context, the synthesis of a Zn coordination complex [Zn(MD)(OH)(H2O)2]·H2O (ZnMD) provide a promising alternative pathway to improve the biological properties of MD. METHODS ZnMD was synthesized and physicochemically characterized. Fluorescence spectral studies were conducted to examine the binding of both, the ligand and the metal with bovine serum albumin (BSA). MD, ZnMD, and ZnCl2 were administered to spontaneous hypertensive rats (SHR) rats during 8 weeks and blood pressure and echocardiographic parameters were determined. Ex vivo assays were conducted to evaluate levels of reactive oxygen species (ROS), thiobarbituric acid reactive substances (TBARS), and nitric oxide (NO). Cross-sectional area (CSA) and collagen levels of left ventricular cardiomyocytes were also assessed. Furthermore, the expression of NAD(P)H oxidase subunits (gp91phox and p47phox) and Superoxide Dismutase 1 (SOD1) was quantified through western blot analysis. RESULTS The complex exhibited a moderate affinity for binding with BSA showing a spontaneous interaction (indicated by negative ΔG values) and moderate affinity (determined by affinity constant values). The binding process involved the formation of Van der Waals forces and hydrogen bonds. Upon treatment with MD and ZnMD, a reduction in the systolic blood pressure in SHR was observed, being ZnMD more effective than MD (122 ± 8.1 mmHg and 145 ± 5.6 mmHg, at 8th week of treatment, respectively). The ZnMD treatment prevented myocardial hypertrophy, improved the heart function and reduced the cardiac fibrosis, as evidenced by parameters such as left ventricular mass, fractional shortening, and histological studies. In contrast, MD did not show noticeable differences in these parameters. ZnMD regulates negatively the oxidative damage by reducing levels of ROS and lipid peroxidation, as well as the cardiac NAD(P)H oxidase, and increasing SOD1 expression, while MD did not show significant effect. Moreover, cardiac nitric oxide levels were greater in the ZnMD therapy compared to MD treatment. CONCLUSION Both MD and ZnMD have the potential to be transported by albumin. Our findings provide important evidence suggesting that this complex could be a potential therapeutic drug for the treatment of hypertension and cardiac hypertrophy and dysfunction.
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Affiliation(s)
- Agustin B Actis Dato
- CEQUINOR-CONICET-CICPBA-UNLP, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Bv. 120 N◦ 1465, 1900 La Plata, Argentina
| | - Valeria R Martinez
- CIC-CONICET-UNLP, Facultad de Médicas, Universidad Nacional de La Plata, 60 y 120, 1900 La Plata, Argentina.
| | - Jorge O Velez Rueda
- CIC-CONICET-UNLP, Facultad de Médicas, Universidad Nacional de La Plata, 60 y 120, 1900 La Plata, Argentina
| | - Enrique L Portiansky
- Laboratorio de Análisis de Imágenes, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, 60 y 118, 1900 La Plata, Argentina
| | - Verónica De Giusti
- CIC-CONICET-UNLP, Facultad de Médicas, Universidad Nacional de La Plata, 60 y 120, 1900 La Plata, Argentina
| | - Evelina G Ferrer
- CEQUINOR-CONICET-CICPBA-UNLP, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Bv. 120 N◦ 1465, 1900 La Plata, Argentina
| | - Patricia A M Williams
- CEQUINOR-CONICET-CICPBA-UNLP, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Bv. 120 N◦ 1465, 1900 La Plata, Argentina.
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Sasikumar R, Kim B, Ishfaque A. Active-site-rich binary metal oxides integrated organic-inorganic hybrid nanocomposite: Electrochemical simultaneous detection of multi-drugs of isoprenaline and resorcinol in real samples. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Freitas A, Vieira I. Sensor modified with gold nanoparticles stabilized in dialdehyde starch/DMSO matrix for methyldopa detection. ELECTROANAL 2022. [DOI: 10.1002/elan.202100529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Lettieri M, Emanuele R, Scarano S, Palladino P, Minunni M. Melanochrome-based colorimetric assay for quantitative detection of levodopa in co-presence of carbidopa and its application to relevant anti-Parkinson drugs. Anal Bioanal Chem 2021; 414:1713-1722. [PMID: 34842945 DOI: 10.1007/s00216-021-03804-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 11/16/2021] [Accepted: 11/24/2021] [Indexed: 12/11/2022]
Abstract
In this paper is reported the selective detection and quantification of levodopa in co-presence of carbidopa. The method took advantage of the spontaneous oxidation and color development of levodopa at basic pH here driven by alkaline earth cations and co-solvent in solution. We have shown for the first time the generation and stabilization of the purple melanochrome from levodopa, by using magnesium acetate and dimethyl sulfoxide, which was here exploited for the development of a quantitative colorimetric assay for the active principle ingredient in commercial drugs for the treatment of Parkinson's disease. The calibration curves of levodopa in the two tablet formulations, containing carbidopa as decarboxylase inhibitor, showed a common linear trend between 10 mg L-1 and 40 mg L-1 with levodopa alone or in combination with carbidopa in standard solutions, with very good reproducibility (CVav%, 3.3% for both brand and generic drug) and very good sensitivity, with limit of quantification about 0.6 mg L-1 in any case. The colorimetric method here developed is very simple and effective, appearing as a rapid and low-cost alternative to other methodologies, involving large and expensive instrumentations, for drug estimation and quality control of pharmaceutical formulations.
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Affiliation(s)
- Mariagrazia Lettieri
- Department of Chemistry 'Ugo Schiff', University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy
| | - Roberta Emanuele
- Department of Chemistry 'Ugo Schiff', University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy
| | - Simona Scarano
- Department of Chemistry 'Ugo Schiff', University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy
| | - Pasquale Palladino
- Department of Chemistry 'Ugo Schiff', University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy.
| | - Maria Minunni
- Department of Chemistry 'Ugo Schiff', University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy
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Santos AM, Wong A, Ferreira LM, Soares FL, Fatibello-Filho O, Moraes FC, Vicentini FC. Multivariate optimization of a novel electrode film architecture containing gold nanoparticle-decorated activated charcoal for voltammetric determination of levodopa levels in pre-therapeutic phase of Parkinson`s disease. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138851] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Andrade ÂL, Cardoso TD, Thomasi SS, Alvarenga ME, da Silva MAN, Magalhães EJ, Duarte HA, de Almeida KJ. A simple and efficient method for simultaneous quantification of levodopa and carbidopa based on controlled oxidation process. CHEMICAL PAPERS 2021. [DOI: 10.1007/s11696-021-01532-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Compounds from Mucuna pruriens Seeds and their Neuroprotective Effects. Chem Nat Compd 2021. [DOI: 10.1007/s10600-021-03425-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Manjula N, Chen SM. Electrochemical sensors for β-adrenoceptor agonist isoprenaline analysis in human urine and serum samples using manganese cobalt oxide-modified glassy carbon electrode. NEW J CHEM 2021. [DOI: 10.1039/d1nj01009c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Schematic illustration for the synthesis of the MCO nanosphere and modification with GCE towards the electrochemical determination of isoprenaline.
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Affiliation(s)
- Natesan Manjula
- Electroanalysis and Bioelectrochemistry Lab
- Department of Chemical Engineering and Biotechnology
- National Taipei University of Technology
- Taipei 106
- Taiwan
| | - Shen-Ming Chen
- Electroanalysis and Bioelectrochemistry Lab
- Department of Chemical Engineering and Biotechnology
- National Taipei University of Technology
- Taipei 106
- Taiwan
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Blue and green emission-transformed fluorescent copolymer: Specific detection of levodopa of anti-Parkinson drug in human serum. Talanta 2020; 214:120817. [DOI: 10.1016/j.talanta.2020.120817] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 01/15/2020] [Accepted: 02/09/2020] [Indexed: 01/04/2023]
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Najafi K, Asadpour-Zeynali K, Mollarasouli F. Preparation of A Magnetic Nanosensor Based on Cobalt Ferrite Nanoparticles for The Electrochemical Determination of Methyldopa in The Presence of Uric Acid. Comb Chem High Throughput Screen 2020; 23:1023-1031. [PMID: 32436826 DOI: 10.2174/1386207323666200521123657] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Revised: 01/02/2020] [Accepted: 03/17/2020] [Indexed: 11/22/2022]
Abstract
AIM AND OBJECTIVE Methyldopa is one of the medications that is used for the treatment of hypertension. Therefore, the determination of methyldopa in the presence of other biological components is essential. In this work, a promising electrochemical sensor based on CoFe2O4 magnetic nanoparticles modified glassy carbon electrode (CoFe2O4/GCE) was developed for electrochemical determination of methyldopa in the presence of uric acid. Cobalt ferrite nanoparticles were synthesized via chemical method. MATERIALS AND METHODS Characterizing the CoFe2O4 was investigated by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), transmission electron microscope (TEM), and cyclic voltammetry techniques. RESULTS Under the optimal experimental conditions, the current response of the electrochemical sensor obtained with differential pulse voltammetry was increased linearly in the concentration range from 1.45 to 15.1 μmol L-1 with the detection limit of 1.07 μmol L-1 for methyldopa. Also, by using the proposed method, methyldopa and uric acid could be analyzed in a mixture independently. The difference in peak potential for analytes is about 150 mV. CONCLUSION The present sensor was successfully applied for the determination of methyldopa in the presence of uric acid in biological samples and the pharmaceutical samples with satisfactory results.
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Affiliation(s)
- Khadijeh Najafi
- Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz 51666-16471, Iran
| | - Karim Asadpour-Zeynali
- Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz 51666-16471, Iran
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Nasr JJ, Shalan S. Validated 1H and 19F nuclear magnetic resonance for the quantitative determination of the hepatitis C antiviral drugs sofosbuvir, ledipasvir, and daclatasvir in tablet dosage forms. Microchem J 2020. [DOI: 10.1016/j.microc.2019.104437] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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The Determination of Parkinson's Drugs in Human Urine by Applying Chemometric Methods. Int J Anal Chem 2019; 2019:7834362. [PMID: 31360168 PMCID: PMC6652062 DOI: 10.1155/2019/7834362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 06/10/2019] [Accepted: 06/20/2019] [Indexed: 11/17/2022] Open
Abstract
The spectrophotometric-chemometric analysis of levodopa and carbidopa that are used for Parkinson's disease was analyzed without any prior reservation. Parkinson's drugs in the urine sample of a healthy person (never used drugs in his life) were analyzed at the same time spectrophotometrically. The chemometric methods used were partial least squares regression (PLS) and principal component regression (PCR). PLS and PCR were successfully applied as chemometric determination of levodopa and carbidopa in human urine samples. A concentration set including binary mixtures of levodopa and carbidopa in 15 different combinations was randomly prepared in acetate buffer (pH 3.5).). UV spectrophotometry is a relatively inexpensive, reliable, and less time-consuming method. Minitab program was used for absorbance and concentration values. The normalization values for each active substance were good (r2>0.9997). Additionally, experimental data were validated statistically. The results of the analyses of the results revealed high recoveries and low standard deviations. Hence, the results encouraged us to apply the method to drug analysis. The proposed methods are highly sensitive and precise, and therefore they were implemented for the determination of the active substances in the urine sample of a healthy person in triumph.
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Fernandez-Pastor I, Luque-Muñoz A, Rivas F, Medina-O'Donnell M, Martinez A, Gonzalez-Maldonado R, Haidour A, Parra A. Quantitative NMR analysis of L-Dopa in seeds from two varieties of Mucuna pruriens. PHYTOCHEMICAL ANALYSIS : PCA 2019; 30:89-94. [PMID: 30216583 DOI: 10.1002/pca.2793] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 07/25/2018] [Accepted: 07/27/2018] [Indexed: 06/08/2023]
Abstract
INTRODUCTION L-Dopa, a key neurotransmitter used to treat neural disorders such as Parkinson's disease, is found in the seeds of the genus Mucuna at a sufficient concentration for possible commercial use. OBJECTIVE To develop a simple and reliable method to extract L-Dopa from M. pruriens seeds in an aqueous medium and then quantitate this compound using a 1 H qNMR method (internal standard); and also to evaluate the accuracy and reproducibility of this method with an NMR calibration curve. METHODOLOGY The extraction method of L-Dopa from M. pruriens was optimized. The quantitation with single point quantitative NMR (qNMR) and NMR calibration curve was based on the resonance properties of the main functional groups of the L-Dopa molecule, in particular the signals of the three aromatic protons, which were compared with the signal of an internal standard such as syringic acid. The accuracy (precision and trueness) and reproducibility of both NMR techniques were evaluated. RESULTS The methods of single point qNMR and NMR calibration curve, applied to the seeds of two M. pruriens varieties, gave very similar L-Dopa contents: 3.0-3.2% and 3.0-3.1%, respectively. CONCLUSION The statistical analysis confirmed the accuracy and reproducibility of this single point qNMR method (internal standard) for determining L-Dopa, as well as other commercial preparations of this species, without performing an NMR calibration curve.
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Affiliation(s)
- Ignacio Fernandez-Pastor
- Departamento de Quimica Organica, Facultad de Ciencias, Universidad de Granada, Fuentenueva s/n, E-18071, Granada, Spain
| | - Antonio Luque-Muñoz
- Unidad de Resonancia Magnetica Nuclear, Centro de Instrumentacion Cientifica, Universidad de Granada, Fuentenueva s/n, E-18071, Granada, Spain
| | - Francisco Rivas
- Departamento de Quimica Organica, Facultad de Ciencias, Universidad de Granada, Fuentenueva s/n, E-18071, Granada, Spain
| | - Marta Medina-O'Donnell
- Departamento de Quimica Organica, Facultad de Ciencias, Universidad de Granada, Fuentenueva s/n, E-18071, Granada, Spain
| | - Antonio Martinez
- Departamento de Quimica Organica, Facultad de Ciencias, Universidad de Granada, Fuentenueva s/n, E-18071, Granada, Spain
| | | | - Ali Haidour
- Unidad de Resonancia Magnetica Nuclear, Centro de Instrumentacion Cientifica, Universidad de Granada, Fuentenueva s/n, E-18071, Granada, Spain
| | - Andres Parra
- Departamento de Quimica Organica, Facultad de Ciencias, Universidad de Granada, Fuentenueva s/n, E-18071, Granada, Spain
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Palakollu VN, Thapliyal N, Chiwunze TE, Karpoormath R, Karunanidhi S, Cherukupalli S. Electrochemically reduced graphene oxide/Poly-Glycine composite modified electrode for sensitive determination of l-dopa. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 77:394-404. [DOI: 10.1016/j.msec.2017.03.173] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 03/18/2017] [Accepted: 03/21/2017] [Indexed: 11/15/2022]
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Beitollahi H, Garkani Nejad F. Graphene Oxide/ZnO Nano Composite for Sensitive and Selective Electrochemical Sensing of Levodopa and Tyrosine Using Modified Graphite Screen Printed Electrode. ELECTROANAL 2016. [DOI: 10.1002/elan.201600143] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Hadi Beitollahi
- Environment Department, Institute of Science and High Technology and Environmental Sciences; Graduate University of Advanced Technology; Kerman Iran
| | - Fariba Garkani Nejad
- Department of Chemistry; Graduate University of Advanced Technology; Kerman Iran
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Sheikh-Mohseni MA, Pirsa S. Nanostructured Conducting Polymer/Copper Oxide as a Modifier for Fabrication of L-DOPA and Uric Acid Electrochemical Sensor. ELECTROANAL 2016. [DOI: 10.1002/elan.201600089] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
| | - Sajad Pirsa
- Department of Food Science and Technology, Faculty of Agriculture; Urmia University; Urmia I.R. Iran
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Ghodsi J, Rafati AA, Shoja Y. First report on hemoglobin electrostatic immobilization on WO3 nanoparticles: application in the simultaneous determination of levodopa, uric acid, and folic acid. Anal Bioanal Chem 2016; 408:3899-909. [DOI: 10.1007/s00216-016-9480-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 02/15/2016] [Accepted: 03/10/2016] [Indexed: 11/25/2022]
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Quantification of methyldopa in pharmaceuticals using a glassy carbon electrode modified with carbon nanotubes. CHINESE CHEM LETT 2016. [DOI: 10.1016/j.cclet.2015.04.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Beitollahi H, Nekooei S. Application of a Modified CuO Nanoparticles Carbon Paste Electrode for Simultaneous Determination of Isoperenaline, Acetaminophen and N-acetyl-L-cysteine. ELECTROANAL 2015. [DOI: 10.1002/elan.201500249] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Mohammadi SZ, Beitollahi H, Jasemi M, Akbari A. Nanomolar Determination of Methyldopa in the Presence of Large Amounts of Hydrochlorothiazide Using a Carbon Paste Electrode Modified with Graphene Oxide Nanosheets and 3-(4′-Amino-3′-hydroxy-biphenyl-4-yl)-acrylic Acid. ELECTROANAL 2015. [DOI: 10.1002/elan.201500245] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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23
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Wang J, Cui L, Han S, Hao F. Size-dependent active effect of cadmium telluride quantum dots on luminol-potassium periodate chemiluminescence system for levodopa detection. APPLIED SPECTROSCOPY 2015; 69:699-704. [PMID: 25955029 DOI: 10.1366/14-07632] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
It was found that cadmium telluride (CdTe) quantum dots (QDs) with different sizes can have a great sensitizing effect on chemiluminescence (CL) emission from luminol-potassium periodate (KIO4) system. Levodopa, a widely prescribed drug in the treatment of Parkinson's disease, could inhibit luminol-KIO4-CdTe QDs CL reaction in alkaline solution. The inhibited CL intensity was proportional to the concentration of levodopa in the range from 8.0 nM to 10.0 μM. The detection limit was 3.8 nM. This method has been successfully applied to determine levodopa in pharmaceutical preparation and human urine and plasma samples with recoveries of 94.1-105.4%. This was the first work for inhibition effect determination of levodopa using a QD-based CL method.
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Affiliation(s)
- Jianbo Wang
- Editorial Department of Journal, Shanxi Normal University, Linfen 041004, Shanxi, China
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24
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Mantena BPV, Rao SV, Rao KMCA, Ramakrishna K, Reddy RS. Rapid Separation Technique for the Determination of Potential Impurities Present in Levodopa, Carbidopa, and Entacapone in Fixed Dose Combination Drug Product Using Trifunctionally Bonded Phase Ethylene Bridged Sorbent Column with Smaller Ion-Pair Reagent. J LIQ CHROMATOGR R T 2015. [DOI: 10.1080/10826076.2015.1020166] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Bhaskara P. V. Mantena
- APL Research Center (a Division of Aurobindo Pharma Limited), Bachupally, Hyderabad, Telangana, India
| | - Sumathi V. Rao
- APL Research Center (a Division of Aurobindo Pharma Limited), Bachupally, Hyderabad, Telangana, India
| | - K. M. Ch. Appa Rao
- Department of Chemistry, Institute of Science, GITAM University, Rushikonda, Andhra Pradesh, India
| | - K. Ramakrishna
- Department of Chemistry, Institute of Science, GITAM University, Rushikonda, Andhra Pradesh, India
| | - R. Srikanth Reddy
- APL Research Center (a Division of Aurobindo Pharma Limited), Bachupally, Hyderabad, Telangana, India
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Emara S, Masujima T, Zarad W, Kamal M, Fouad M, El-Bagary R. An Eco-Friendly Direct Injection HPLC Method for Methyldopa Determination in Serum by Mixed-Mode Chromatography Using a Single Protein-Coated Column. J Chromatogr Sci 2015; 53:1353-60. [DOI: 10.1093/chromsci/bmv024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Indexed: 11/14/2022]
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26
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Emara S, Masujima T, Zarad W, Kamal M, Fouad M, El-Bagary R. A Combination of Isocratic and Gradient Elution Modes in HPLC with the Aid of Time-Overlapping Process for Rapid Determination of Methyldopa in Human Urine. J LIQ CHROMATOGR R T 2014. [DOI: 10.1080/10826076.2014.896813] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Samy Emara
- a Department of Pharmaceutical Chemistry , Faculty of Pharmacy, Misr International University , Cairo , Egypt
| | - Tsutomu Masujima
- b P.I. Lab. Single Cell MS, RIKEN Quantitative Biology Center , Suita , Osaka , Japan
| | - Walaa Zarad
- a Department of Pharmaceutical Chemistry , Faculty of Pharmacy, Misr International University , Cairo , Egypt
| | - Maha Kamal
- c Department of Pharmaceutical Analytical Chemistry , Faculty of Pharmacy, Modern Sciences and Arts University , Cairo , Egypt
| | - Marwa Fouad
- d Department of Pharmaceutical Chemistry , Faculty of Pharmacy, Cairo University , Cairo , Egypt
| | - Ramzia El-Bagary
- d Department of Pharmaceutical Chemistry , Faculty of Pharmacy, Cairo University , Cairo , Egypt
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27
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Upadhyay K, Asthana A, Tamrakar RK. Extractive spectrophotometric determination of α-methyldopa in bulk dosage and in its formulations. RESEARCH ON CHEMICAL INTERMEDIATES 2014. [DOI: 10.1007/s11164-014-1678-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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28
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Raut PP, Charde SY. Simultaneous estimation of levodopa and carbidopa by RP-HPLC using a fluorescence detector: its application to a pharmaceutical dosage form. LUMINESCENCE 2014; 29:762-71. [DOI: 10.1002/bio.2618] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 08/19/2013] [Accepted: 10/29/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Prashant P. Raut
- Department of Pharmacy; Birla Institute of Technology and Science; Pilani India
| | - Shrikant Y. Charde
- Department of Pharmacy; Birla Institute of Technology and Science; Pilani India
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29
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Shahabadi N, Maghsudi M. Multi-spectroscopic and molecular modeling studies on the interaction of antihypertensive drug; methyldopa with calf thymus DNA. ACTA ACUST UNITED AC 2014; 10:338-47. [DOI: 10.1039/c3mb70340a] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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A selective determination of levodopa in the presence of ascorbic acid and uric acid using a glassy carbon electrode modified with reduced graphene oxide. J APPL ELECTROCHEM 2013. [DOI: 10.1007/s10800-013-0649-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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31
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Adsorptive stripping voltammetry determination of methyldopa on the surface of a carboxylated multiwall carbon nanotubes modified glassy carbon electrode in biological and pharmaceutical samples. Colloids Surf B Biointerfaces 2013; 109:253-8. [DOI: 10.1016/j.colsurfb.2013.04.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Revised: 03/06/2013] [Accepted: 04/01/2013] [Indexed: 11/18/2022]
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32
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Pérez-Mella B, Álvarez-Lueje A. Development of a Carbon Nanotube Modified Ionic Liquid Electrode for the Voltammetric Determination of Methyldopa Levels in Urine. ELECTROANAL 2013. [DOI: 10.1002/elan.201300241] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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33
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Sima IA, Casoni D, Sârbu C. SIMULTANEOUS DETERMINATION OF CARBIDOPA AND LEVODOPA USING A NEW TLC METHOD AND A FREE RADICAL AS DETECTION REAGENT. J LIQ CHROMATOGR R T 2013. [DOI: 10.1080/10826076.2013.790765] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Ioana Anamaria Sima
- a Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University , Cluj-Napoca , România
| | - Dorina Casoni
- a Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University , Cluj-Napoca , România
| | - Costel Sârbu
- a Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University , Cluj-Napoca , România
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34
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Mazloum-Ardakani M, Yavari M, Ali Sheikh-Mohseni M, Mirjalili BF. Carbon nanotubes and (4-((E)-(2-methyl-4-nitrophenylimino) methyl) benzene-1,2-diol) modified glassy carbon electrode as a new electrocatalyst for oxidation of levodopa. Catal Sci Technol 2013. [DOI: 10.1039/c3cy00163f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Development of a sensor for L-Dopa based on Co(DMG)2ClPy/multi-walled carbon nanotubes composite immobilized on basal plane pyrolytic graphite electrode. Bioelectrochemistry 2012; 86:22-9. [DOI: 10.1016/j.bioelechem.2012.01.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Revised: 12/20/2011] [Accepted: 01/01/2012] [Indexed: 11/19/2022]
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36
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Electrochemical determination of isoprenaline using a graphene-modified glassy carbon electrode. J Solid State Electrochem 2012. [DOI: 10.1007/s10008-012-1770-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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37
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Mazloum-Ardakani M, Sheikh-Mohseni MA, Abdollahi-Alibeik M, Benvidi A. Application of nanosized MCM-41 to fabrication of a nanostructured electrochemical sensor for the simultaneous determination of levodopa and carbidopa. Analyst 2012; 137:1950-5. [DOI: 10.1039/c2an15795k] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Shahrokhian S, Rastgar S. Electrodeposition of Pt–Ru nanoparticles on multi-walled carbon nanotubes: Application in sensitive voltammetric determination of methyldopa. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.09.023] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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39
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Abbaspour A, Dehghani E, Noori A. Cyclodextrin Host-Guest Recognition Approach for Simultaneous Quantification and Voltammetric Studies of Levodopa and Carbidopa in Pharmaceutical Products. ELECTROANAL 2011. [DOI: 10.1002/elan.201100327] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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40
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Mazloum-Ardakani M, Ganjipour B, Beitollahi H, Amini MK, Mirkhalaf F, Naeimi H, Nejati-Barzoki M. Simultaneous determination of levodopa, carbidopa and tryptophan using nanostructured electrochemical sensor based on novel hydroquinone and carbon nanotubes: Application to the analysis of some real samples. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.07.021] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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41
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Moccelini SK, Franzoi AC, Vieira IC, Dupont J, Scheeren CW. A novel support for laccase immobilization: Cellulose acetate modified with ionic liquid and application in biosensor for methyldopa detection. Biosens Bioelectron 2011; 26:3549-54. [DOI: 10.1016/j.bios.2011.01.043] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2010] [Revised: 01/28/2011] [Accepted: 01/31/2011] [Indexed: 02/07/2023]
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42
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43
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Kinetic approach for the enzymatic determination of levodopa and carbidopa assisted by multivariate curve resolution-alternating least squares. Anal Chim Acta 2010; 673:33-9. [DOI: 10.1016/j.aca.2010.05.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2010] [Revised: 05/17/2010] [Accepted: 05/18/2010] [Indexed: 11/24/2022]
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44
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PAGANI AP, CABEZÓN MA, IBÁÑEZ GA. Simultaneous Kinetic-Spectrofluorometric Determination of Levodopa and Carbidopa Using Partial Least-Squares Regression. ANAL SCI 2009; 25:633-8. [DOI: 10.2116/analsci.25.633] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Ariana P. PAGANI
- Departamento de Química Analítica, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario and Instituto de Química Rosario (IQUIR), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
| | - Miguel A. CABEZÓN
- Departamento de Química Analítica, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario and Instituto de Química Rosario (IQUIR), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
| | - Gabriela A. IBÁÑEZ
- Departamento de Química Analítica, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario and Instituto de Química Rosario (IQUIR), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
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45
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Alam SM, Karim MM, Lee SH, Wabaidur SM, Chung HY, Choi JH, Kang M. Development of a sensitive flow-injection-chemiluminescence detection method for the determination of laevodopa. LUMINESCENCE 2008; 23:327-32. [DOI: 10.1002/bio.1039] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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46
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Kim WH, Karim MM, Lee SH. Simultaneous determination of levodopa and carbidopa by synchronous fluorescence spectrometry using double scans. Anal Chim Acta 2008; 619:2-7. [DOI: 10.1016/j.aca.2008.01.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2007] [Accepted: 01/05/2008] [Indexed: 10/22/2022]
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47
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ZHANG YX, ZHANG ZJ, YANG F. Simultaneous Determination of Levodopa and Its Metabolite in Human Blood by Capillary Electrophoresis with Laser-induced Fluorescence Detection. CHINESE J CHEM 2008. [DOI: 10.1002/cjoc.200890092] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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48
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Chamsaz M, Safavi A, Fadaee J. Simultaneous kinetic-spectrophotometric determination of carbidopa, levodopa and methyldopa in the presence of citrate with the aid of multivariate calibration and artificial neural networks. Anal Chim Acta 2007; 603:140-6. [DOI: 10.1016/j.aca.2007.09.006] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2007] [Revised: 08/26/2007] [Accepted: 09/06/2007] [Indexed: 11/28/2022]
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49
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Liu SY, Hu CQ. A comparative uncertainty study of the calibration of macrolide antibiotic reference standards using quantitative nuclear magnetic resonance and mass balance methods. Anal Chim Acta 2007; 602:114-21. [DOI: 10.1016/j.aca.2007.09.009] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2007] [Revised: 09/05/2007] [Accepted: 09/06/2007] [Indexed: 11/25/2022]
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50
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Mennickent S, Nail M, Vega M, de Diego M. Quantitative determination of L-DOPA in tablets by high performance thin layer chromatography. J Sep Sci 2007; 30:1893-8. [PMID: 17638351 DOI: 10.1002/jssc.200600533] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
A densitometric high performance thin-layer chromatographic (HPTLC) method was developed and validated for quantitative analysis of L-DOPA in tablets. Chromatographic separation was achieved on precoated silica gel F 254 HPTLC plates using a mixture of acetone-chloroform-n-butanol-acetic acid glacial-water (60:40:40:40:35 v/v/v/v/v) as mobile phase. Quantitative analysis was carried out at a wavelength of 497 nm. The method was linear between 100 and 500 ng/microL, with a correlation coefficient of 0.999. The intra-assay variation was between 0.26 and 0.65% and the interassay was between 0.52 and 2.04%. The detection limit was 1.12 ng/microL, and the quantification limit was 3.29 ng/microL. The accuracy ranged from 100.40 to 101.09%, with a CV not higher than 1.40%. The method was successfully applied to quantify L-DOPA in real pharmaceutical samples, including the comparison with HPLC measurements. The method was fast, specific, with a good precision, and accurate for the quantitative determination of L-DOPA in tablets.
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Affiliation(s)
- Sigrid Mennickent
- Department of Pharmacy, Faculty of Pharmacy, University of Concepción, Concepción, Chile.
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