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Abdel-Megied AM, Kovalenko S, Elbarbry FA, Piponski M, Oleshchuk O, El Deeb S, Magdy G, Belal F, Grochovuy T, Logoyda L. LC-MS/MS bioanalytical method for the quantitative analysis of nifedipine, bisoprolol, and captopril in human plasma: Application to pharmacokinetic studies. Biomed Chromatogr 2023; 37:e5664. [PMID: 37114598 DOI: 10.1002/bmc.5664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 04/10/2023] [Accepted: 04/23/2023] [Indexed: 04/29/2023]
Abstract
In this study, the development and validation of an accurate and highly sensitive LC-MS/MS method were performed for the estimation of nifedipine, bisoprolol and captopril in real human plasma. Liquid-liquid extraction using tert-butyl methyl ether was efficiently applied for extraction of the analytes from plasma samples. The chromatographic separation was carried out using an isocratic elution mode on the X-terra MS C18 column (4.6 × 50 mm, 3.5 μm). The mobile phase consisted of methanol-0.1% formic acid (95:5, v/v) for determination of nifedipine and bisoprolol and acetonitrile-0.1% formic acid (70:30, v/v) for determination of captopril with a flow rate of 0.5 ml/min. Acceptable results regarding the different validation characteristics of the analytes were obtained in accordance with US Food and Drug Administration recommendations for bioanalytical methods. The developed approach was linear over concentration ranges of 0.5-130.0, 50.0-4,500.0 and 0.3-30.0 ng/ml for nifedipine, captopril and bisoprolol, respectively. The method revealed a sufficient lower limit of quantification in the range of 0.3-50.0 ng/ml, as well as high recovery percentages, indicating high bioanalytical applicability. The proposed method was efficiently applied to a pharmacokinetic evaluation of a fixed-dose combination of the analytes in healthy male volunteers.
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Affiliation(s)
- Ahmed M Abdel-Megied
- Department of Pharmaceutical Sciences, Notre Dame of Maryland University, School of Pharmacy, Baltimore, Maryland, USA
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Kafrelsheikh University, Kafrelsheikh, Egypt
| | | | - Fawzy A Elbarbry
- School of Pharmacy, Pacific University Oregon, Hillsboro, Oregon, USA
| | - Marjan Piponski
- Quality Control Department, Replek Farm Ltd., Skopje, Republic of North Macedonia
| | - Oleksandra Oleshchuk
- Department of Pharmacology and Clinical Pharmacology, I. Horbachevsky Ternopil National Medical University, Ternopil, Ukraine
| | - Sami El Deeb
- Institute of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany
| | - Galal Magdy
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Kafrelsheikh University, Kafrelsheikh, Egypt
| | - Fathalla Belal
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Taras Grochovuy
- Department of Pharmacy Management, Economics and Technology, I. Horbachevsky Ternopil National Medical University, Ternopil, Ukraine
| | - Liliya Logoyda
- Department of Pharmaceutical Chemistry, I. Horbachevsky Ternopil National Medical University, Ternopil, Ukraine
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2
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Al-Farhan B, Alfarsi A, Abdel-Rahman LH, Naggar AH, Farghaly OA. Developing Metal Complexes for Captopril Quantification in Tablets Using Potentiometric and Conductometric Methods. ACS OMEGA 2023; 8:2773-2779. [PMID: 36687111 PMCID: PMC9850714 DOI: 10.1021/acsomega.2c07455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
Potentiometric and conductometric methods were successfully applied to elucidate the interaction of 10 ions, viz., Cr3+, Fe3+, La2+, Th4+, Co2+, Mn2+, Pd2+, Sr2+, Ti2+, and Zr2+, with the antihypertensive drug captopril (CAP) and its role to determine CAP in pure powder and tablet forms. The ionization constant of CAP and the generated complexes' stability constants (log K) were evaluated using potentiometric and conductometric methods at 25 ± 0.1 °C and 0.05 M ionic strength (I) of NaNO3 aqueous solution, and CAP was then determined in pure powder and tablet forms. Complexes having metal:ligand ratios of 1:1, 1:2, and/or 1:3 were produced, regardless of the type of the ligand or metal ions. Both the suggested potentiometric and conductometric procedures were utilized to confirm the stoichiometry of the M-CAP binary complexes formed. These two different techniques were utilized successfully to determine CAP in pure powder and tablet forms. Using the standard addition method (SAM) based on the Gran plot, CAP was satisfactorily determined throughout the concentration range of 0.83-13.04 mg/mL (SD = 0.20, R = 0.9986 (n = 5)), with a detection limit of 0.64 mg/mL (SD = 0.20, R = 0.9986 (n = 5)). In the presence of common tablet excipients, no interferences were observed. The percentage of CAP recovered from various dosage formulations (tablets) varied from 95.88 to 99.92%.
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Affiliation(s)
- Badriah
Saad Al-Farhan
- Chemistry
Department, Faculty of Girls for Science, King Khalid University, Abha 61421, Saudi Arabia
| | - Anas Alfarsi
- Department
of Chemistry, Faculty of Science, Albaha
University, Albaha 61008, Saudi Arabia
| | | | - Ahmed H. Naggar
- Department
of Chemistry, College of Science and Arts, Jouf University, Al−Qurayyat 75911, Saudi Arabia
- Chemistry
Department, Faculty of Science, Al-Azhar
University, Assiut Branch, 71524 Assiut, Egypt
| | - Othman A. Farghaly
- Department
of Chemistry, Faculty of Science, Albaha
University, Albaha 61008, Saudi Arabia
- Chemistry
Department, Faculty of Science, Al-Azhar
University, Assiut Branch, 71524 Assiut, Egypt
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3
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Ganesan M, Keerthika Devi R, Liao AH, Lee KY, Gopalakrishnan G, Chuang HC. 3D-flower-like porous neodymium molybdate nanostructure for trace level detection of organophosphorus pesticide in food samples. Food Chem 2022; 396:133722. [PMID: 35870247 DOI: 10.1016/j.foodchem.2022.133722] [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: 02/03/2022] [Revised: 07/12/2022] [Accepted: 07/13/2022] [Indexed: 11/04/2022]
Abstract
Herein we report (i) designing of porous 3D flower-like neodymium molybdate nanosheets (pf-NdM NSs) and (ii) attaining reasonable selectivity towards methyl parathion (MP, organophosphate pesticide) in the presence of structurally comparable interferents. Herein the pf-NdM NSs as a catalyst for electrochemical detection of MP in food samples is reported for the first time. Because of porous morphology, and high surface area, the proposed catalyst offers a high electrocatalytic activity toward MP reduction. As a result, a low detection limit (5.7 nM), wide linear range (0.5 - 300 μM), and good sensitivity (1.88 µA µM-1 cm-2), with decent selectivity were achieved. Further, the real sample analysis in tomato juice, and paddy grains, yielded good recovery results, demonstrating the practicability of the proposed sensor. Overall, our study presents a method for designing a novel-nanostructured material for trace-level detection of pesticides that is simple to fabricate, and also delivers a good performance.
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Affiliation(s)
- Muthusankar Ganesan
- Department of Mechanical Engineering, National Taipei University of Technology, Taipei, 10608, Taiwan, ROC; Department of Industrial Chemistry, Alagappa University, Karaikudi 630003, Tamil Nadu, India
| | - Ramadhass Keerthika Devi
- Department of Chemical Engineering and Biotechnology, College of Engineering, National Taipei University of Technology, Taipei 106, Taiwan, ROC
| | - Ai-Ho Liao
- Graduate Institute of Biomedical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Department of Biomedical Engineering, National Defense Medical Center, Taipei, Taiwan
| | - Kuo-Yu Lee
- SV Probe Technology Taiwan, Co., Ltd., Zhubei, Taiwan
| | - Gopu Gopalakrishnan
- Department of Industrial Chemistry, Alagappa University, Karaikudi 630003, Tamil Nadu, India
| | - Ho-Chiao Chuang
- Department of Mechanical Engineering, National Taipei University of Technology, Taipei, 10608, Taiwan, ROC.
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4
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Adeyemi JO, Onwudiwe DC, Oyedeji AO. Biogenic Synthesis of CuO, ZnO, and CuO-ZnO Nanoparticles Using Leaf Extracts of Dovyalis caffra and Their Biological Properties. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27103206. [PMID: 35630680 PMCID: PMC9144262 DOI: 10.3390/molecules27103206] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 04/20/2022] [Accepted: 04/28/2022] [Indexed: 01/03/2023]
Abstract
Biogenic metal oxide nanoparticles (NPs) have emerged as a useful tool in biology due to their biocompatibility properties with most biological systems. In this study, we report the synthesis of copper oxide (CuO), zinc oxide (ZnO) nanoparticles (NPs), and their nanocomposite (CuO–ZnO) prepared using the phytochemical extracts from the leaves of Dovyalis caffra (kei apple). The physicochemical properties of these nanomaterials were established using some characterization techniques including X-ray diffraction analysis (XRD), ultraviolet-visible spectroscopy (UV-vis), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDX). The XRD result confirmed the presence of a monoclinic CuO (Tenorite), and a hexagonal ZnO (Zincite) nanoparticles phase, which were both confirmed in the CuO–ZnO composite. The electron microscopy of the CuO–ZnO, CuO, and ZnO NPs showed a mixture of nano-scale sizes and spherical/short-rod morphologies, with some agglomeration. In the constituent’s analysis (EDX), no unwanted peak was found, which showed the absence of impurities. Antioxidant properties of the nanoparticles was studied, which confirmed that CuO–ZnO nanocomposite exhibited better scavenging potential than the individual metal oxide nanoparticles (CuO, and ZnO), and ascorbic acid with respect to their minimum inhibitory concentration (IC50) values. Similarly, the in vitro anticancer studies using MCF7 breast cancer cell lines indicated a concentration-dependent profile with the CuO–ZnO nanocomposite having the best activity over the respective metal oxides, but slightly lower than the standard 5-Fluorouracil drug.
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Affiliation(s)
- Jerry O. Adeyemi
- Department of Chemical and Physical Sciences, Faculty of Natural Sciences, Walter Sisulu University, Mthatha 5099, South Africa;
- Correspondence:
| | - Damian C. Onwudiwe
- Department of Chemistry, Faculty of Natural and Agricultural Science, North-West University, Private Bag X2046, Mmabatho 2735, South Africa;
- Material Science Innovation and Modelling (MaSIM) Research Focus Area, Faculty of Natural and Agricultural Science, North-West University, Mafikeng Campus, Private Bag X2046, Mmabatho 2735, South Africa
| | - Adebola O. Oyedeji
- Department of Chemical and Physical Sciences, Faculty of Natural Sciences, Walter Sisulu University, Mthatha 5099, South Africa;
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5
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Han C, Lyu Y, Wang S, Liu B, Zhang Y, Du H. Role of Noncovalent Interactions on the Electrocatalytic Oxidation of Ethanol in Alkali Metal Hydroxide Solutions. ACS APPLIED MATERIALS & INTERFACES 2022; 14:5318-5327. [PMID: 35049292 DOI: 10.1021/acsami.1c20964] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Ethanol is considered to be one of the most promising fuels for fuel cells. However, ethanol fuel cells have a sluggish Faraday efficiency due to complex interactions between the electrolyte, electrode, and ethanol. Recent studies have further suggested that noncovalent interactions originated from the hydrated alkali metal cations and the adsorbed OHad at the Pt electrode surface also played an important role in the electron transfer. In this regard, the noncovalent interactions in different alkali metal hydroxide (AMH) solutions have been systematically investigated in this study, and it was observed that the noncovalent interactions could result in the occupation of the Pt electrode surface active sites and sluggish migration of ethanol molecules in the electrical double layer, significantly affecting the electro-oxidation efficiency. Further, it was concluded that the electro-oxidation efficiency in different AMH solutions followed the order of K+ > Na+ > Rb+ > Cs+ > Li+ due to the noncovalent interactions.
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Affiliation(s)
- Chenjie Han
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Yeqing Lyu
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Shaona Wang
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Biao Liu
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Yi Zhang
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Hao Du
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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6
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Nazifi M, Ahmadi R, Ramezani AM, Absalan G. Introducing hierarchical hollow MnO 2 microspheres as nanozymes for colorimetric determination of captopril. Anal Bioanal Chem 2021; 413:7063-7072. [PMID: 34622321 DOI: 10.1007/s00216-021-03672-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 09/11/2021] [Accepted: 09/15/2021] [Indexed: 11/29/2022]
Abstract
A simple sensor was developed for the colorimetric determination of captopril (CPT). Herein, hierarchical hollow MnO2 microspheres (HH-MnO2) were applied as nanozymes with peroxidase-mimetic activity. Free cation radicals with a strong absorption signal (λmax at 653 nm) were generated via a redox reaction between 3, 3', 5, 5'-tetramethylbenzidine (TMB) and HH-MnO2. Captopril could successfully prevent the generation of blue-colored free cation radicals. The influence of CPT concentration on the absorption of the generated radicals was monitored by UV-Vis spectroscopy. The corresponding linear concentration range was from 1.0 to 30.0 μg mL-1 (4.6-138.1 μmol L-1), and the detection limit was found to be 0.26 μg mL-1 (1.2 μmol L-1). As a practical usage, the developed sensor was effectively utilized to measure the content of CPT in pharmaceutical formulations.
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Affiliation(s)
- Mohammad Nazifi
- Professor Massoumi Laboratory, Department of Chemistry, College of Sciences, Shiraz University, Shiraz, 71454, Iran
| | - Raheleh Ahmadi
- Professor Massoumi Laboratory, Department of Chemistry, College of Sciences, Shiraz University, Shiraz, 71454, Iran
| | - Amir M Ramezani
- Healthy Ageing Research Center, Neyshabur University of Medical Sciences, Neyshabur, Iran.
| | - Ghodratollah Absalan
- Professor Massoumi Laboratory, Department of Chemistry, College of Sciences, Shiraz University, Shiraz, 71454, Iran.
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7
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Silah H, Erkmen C, Demir E, Uslu B. Modified indium tin oxide electrodes: Electrochemical applications in pharmaceutical, biological, environmental and food analysis. Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2021.116289] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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8
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Synthesis and characterization of novel lanthanum nanoparticles-graphene quantum dots coupled with zeolitic imidazolate framework and its electrochemical sensing application towards vitamin D3 deficiency. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125854] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Silva DM, Carneiro da Cunha Areias M. Voltammetric Detection of Captopril in a Commercial Drug Using a Gold‐Copper Metal‐organic Framework Nanocomposite Modified Electrode. ELECTROANAL 2021. [DOI: 10.1002/elan.202060271] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Diana Maria Silva
- Departamento de Química Fundamental, Centro de Ciências Exatas e da Natureza Universidade Federal de Pernambuco Av. Jornalista Anibal Fernandes, s/n° Cidade Universitária – Recife, PE – CEP 50.740-560 50.740-560 Recife Brazil
| | - Madalena Carneiro da Cunha Areias
- Departamento de Química Fundamental, Centro de Ciências Exatas e da Natureza Universidade Federal de Pernambuco Av. Jornalista Anibal Fernandes, s/n° Cidade Universitária – Recife, PE – CEP 50.740-560 50.740-560 Recife Brazil
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10
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Ravi PV, Thangadurai DT, Nehru K, Lee YI, Nataraj D, Thomas S, Kalarikkal N, Jose J. Surface and morphology analyses, and voltammetry studies for electrochemical determination of cerium(iii) using a graphene nanobud-modified-carbon felt electrode in acidic buffer solution (pH 4.0 ± 0.05). RSC Adv 2020; 10:37409-37418. [PMID: 35521276 PMCID: PMC9057166 DOI: 10.1039/d0ra07555h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 09/25/2020] [Indexed: 12/25/2022] Open
Abstract
Trace determination of radioactive waste, especially Ce3+, by electrochemical methods has rarely been attempted. Ce3+ is (i) a fluorescence quencher, (ii) an antiferromagnet, and (iii) a superconductor, and it has been incorporated into fast scintillators, LED phosphors, and fluorescent lamps. Although Ce3+ has been utilized in many industries due to its specific properties, it causes severe health problems to human beings because of its toxicity. Nanomaterials with fascinating electrical properties can play a vital role in the fabrication of a sensor device to detect the analyte of interest. In the present study, surfactant-free 1,8-diaminonaphthalene (DAN)-functionalized graphene quantum dots (DAN-GQDs) with nanobud (NB) morphology were utilized for the determination of Ce3+ through electrochemical studies. The working electrode, graphene nanobud (GNB)-modified-carbon felt (CF), was developed by a simple drop-coating method for the sensitive detection of Ce3+ in acetate buffer solution (ABS, pH 4.0 ± 0.05) at a scan rate of 50 mV s−1 using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques. CV and DPV studies validated the existence of distinctive peaks at approximately +0.20 and +0.93 V (vs. SCE), respectively, with a limit of detection of approximately 2.60 μM. Furthermore, electrochemical studies revealed that the GNB-modified-CF electrode was (i) stable even after fifteen cycles, (ii) reproducible, (iii) selective towards Ce3+, (iv) strongly pH-dependent, and (v) favored Ce3+ sensing only at pH 4.0 ± 0.05. Impedance spectroscopy results indicated that the GNB-modified-CF electrode was more conductive (1.38 × 10−4 S m−1) and exhibited more rapid electron transfer than bare CF, which agrees with the attained Randles equivalent circuit. Microscopy (AFM, FE-SEM, and HR-TEM), spectroscopy (XPS and Raman), XRD, and energy-dispersive X-ray (EDX) analyses of the GNB-modified-CF electrode confirmed the adsorption of Ce3+ onto the electrode surface and the size of the electrode material. Ce3+ nanobuds increased from 35–40 to 50–55 nm without changing their morphology. The obtained results provide an insight into the determination of Ce3+ to develop an electrochemical device with low sensitivity. GNB-modified – CF electrode was utilized to determine Ce3+ with LoD ca. 2.60 μM.![]()
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Affiliation(s)
- Pavithra V Ravi
- Department of Nanoscience and Technology, Sri Ramakrishana Engineering College, Affiliated to Anna University Coimbatore - 641 022 Tamilnadu India
| | - Daniel T Thangadurai
- Department of Nanoscience and Technology, Sri Ramakrishana Engineering College, Affiliated to Anna University Coimbatore - 641 022 Tamilnadu India
| | - Kasi Nehru
- Department of Chemistry, Anna University - Bharathidasan Institute of Technology Tiruchirappalli - 620 024 Tamilnadu India
| | - Yong Ill Lee
- Department of Chemistry, Changwon National University Changwon 641-773 South Korea
| | - Devaraj Nataraj
- Department of Physics, Bharathiar University Coimbatore - 641 046 Tamilnadu India
| | - Sabu Thomas
- International and Inter-University Centre for Nanoscience and Nontechnology, Mahatma Gandhi University Kottayam - 686 560 Kerala India
| | - Nandakumar Kalarikkal
- International and Inter-University Centre for Nanoscience and Nontechnology, Mahatma Gandhi University Kottayam - 686 560 Kerala India
| | - Jiya Jose
- International and Inter-University Centre for Nanoscience and Nontechnology, Mahatma Gandhi University Kottayam - 686 560 Kerala India
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In-situ growth of NiWO4 saw-blade-like nanostructures and their application in photo-electrochemical (PEC) immunosensor system designed for the detection of neuron-specific enolase. Biosens Bioelectron 2019; 141:111331. [DOI: 10.1016/j.bios.2019.111331] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 05/14/2019] [Accepted: 05/15/2019] [Indexed: 11/21/2022]
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12
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Pang LY, Wang P, Gao JJ, Wen Y, Liu H. An active metal-organic anion framework with highly exposed SO42− on {001} facets for the enhanced electrochemical detection of trace Fe3+. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.01.067] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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13
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Aghamohseni B, Hassaninejad-Darzi SK, Asadollahi-Baboli M. A new sensitive voltammetric determination of thymol based on MnY nanozeolite modified carbon paste electrode using response surface methodology. Microchem J 2019. [DOI: 10.1016/j.microc.2018.11.045] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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14
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Rahman N, Khan S. Circular Dichroism Spectroscopy: A Facile Approach for Quantitative Analysis of Captopril and Study of Its Degradation. ACS OMEGA 2019; 4:4252-4258. [PMID: 31459632 PMCID: PMC6648687 DOI: 10.1021/acsomega.8b03384] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 02/12/2019] [Indexed: 05/04/2023]
Abstract
Simple and selective zero- and second-order derivative circular dichroism (CD) spectroscopic methods have been designed for the assay of captopril in commercially available dosage forms. A normal CD spectroscopic scan (zero order) exhibits a negative band at 208 nm (method A) in distilled water. The calibration curve shows a linear response over the concentration range of 10-80 μg mL-1. The second-order derivative (D2) CD spectrum shows one positive band at 208 nm (method B) and one negative band at 225 nm (method C). Linear calibration curves were obtained in the concentration range of 10-70 μg mL-1 for both the methods (B and C). The detection limits were found to be 1.26, 1.48, and 2.38 μg mL-1 for methods A, B, and C, respectively. The study under stressed acidic, basic, and oxidative conditions showed the degradation of captopril. The proposed methods were validated as per ICH guidelines. All the proposed methods were compared with the reference method to demonstrate its suitability for quality control of captopril in its dosage forms.
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15
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Shahbakhsh M, Noroozifar M. 2D-Single-crystal hexagonal gold nanosheets for ultra-trace voltammetric determination of captopril. Mikrochim Acta 2019; 186:195. [PMID: 30783850 DOI: 10.1007/s00604-019-3260-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 01/16/2019] [Indexed: 11/29/2022]
Abstract
Two dimensional single-crystal hexagonal gold nanosheets (SCHGNSs) were prepared by microwave heating of a solution of HAuCl4 in an ionic liquid. The SCHGNSs were characterized by field emission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, atomic force microscopy and electrochemical impedance spectroscopy. The SCHGNSs were then used to modify a graphite paste electrode for voltammetric determination of the hypertension drug captopril (CAP). The modified electrode showed a well-defined oxidation peak (at 0.41 V vs. Ag/AgCl) at pH 7.0 using differential pulse voltammetry. Under the optimum conditions, the response is linear in the 2-400 nM and 4.0-50 μM CAP concentration range, and the detection limit (at S/N = 3) is 0.3 nM. The sensor was successfully applied to the determination of CAP in pharmaceutical tablets and in spiked urine. Graphical abstract Schematic presentation of the preparation of single crystal hexagonal gold nanosheets and their use to modify a carbon paste electrode for ultra-trace voltammetric determination of the drug captopril.
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Affiliation(s)
- Mehdi Shahbakhsh
- Analytical Research Laboratory, Department of Chemistry, University of Sistan and Baluchestan, P.O. Box 98135-674, Zahedan, 98167-45845, Iran.
| | - Meissam Noroozifar
- Analytical Research Laboratory, Department of Chemistry, University of Sistan and Baluchestan, P.O. Box 98135-674, Zahedan, 98167-45845, Iran
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16
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Wang ZX, Gao YF, Yu XH, Kong FY, Lv WX, Wang W. Photoluminescent coral-like carbon-branched polymers as nanoprobe for fluorometric determination of captopril. Mikrochim Acta 2018; 185:422. [PMID: 30128634 DOI: 10.1007/s00604-018-2961-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 08/11/2018] [Indexed: 01/07/2023]
Abstract
The authors describe the synthesis of fluorescent coral-like carbon nano-branched polymers (PCNBPs) co-doped with nitrogen and phosphorus. Uric acid and phosphoric acid act as nitrogen and phosphorus sources, respectively. The PCNBPs have a coral-like branched structure, are cross-connected, and < 20 nm in skeleton diameter. Their blue fluorescence, best measured at excitation/emission wavelengths of 330/425 nm, is quenched by mercury (II) ions due to the specifically restricted rigid conformation caused by the interaction of phosphorus, nitrogen, and oxygen groups on the surface of the PCNBPs. Fluorescence is selectivity quenched by Hg(II) but restored in addition of the hypertension drug captopril (CAP) in the range 50 nM to 40 μM concentration range. Fluorescence recovery is attributed to the effectively specific interactions between the thiol group of CAP and Hg(II). The method was applied to the determination of the concentration of Cap in pharmaceutical samples, and recoveries were between 97.6 and 105.1%. Graphical abstract Fluorescent coral-like carbon nano-branched polymers (PCNBPs) co-doped with nitrogen and phosphorus are described. Their fluorescence is selectivity quenched by Hg(II) but restored in addition of the hypertension drug captopril (Cap) in the range 50 nM to 40 μM concentration range.
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Affiliation(s)
- Zhong-Xia Wang
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China
| | - Yuan-Fei Gao
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China
| | - Xian-He Yu
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China
| | - Fen-Ying Kong
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China
| | - Wei-Xin Lv
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China
| | - Wei Wang
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China.
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