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Silva WR, Oliveira LFM, Sotomayor MDPT, Petruci JFDS. Development of a "turn off" fluorescent molecularly imprinted nanoparticle-based sensor for selective captopril quantification in synthetic urine and wastewater samples. Mikrochim Acta 2024; 191:374. [PMID: 38847878 DOI: 10.1007/s00604-024-06446-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Accepted: 05/22/2024] [Indexed: 06/12/2024]
Abstract
The combination of silica nanoparticles with fluorescent molecularly imprinted polymers (Si-FMIPs) prepared by a one-pot sol-gel synthesis method to act as chemical sensors for the selective and sensitive determination of captopril is described. Several analytical parameters were optimized, including reagent ratio, solvent, concentration of Si-FMIP solutions, and contact time. Fourier-transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), and the ninhydrin assay were used for characterization. The selectivity was evaluated against molecules belonging to other drug classes, such as fluoroquinolones, nonacid nonopioids, benzothiadiazine, alpha amino acids, and nitroimidazoles. Under optimized conditions, the Si-FMIP-based sensor exhibited a working range of 1-15 µM, with a limit of detection (LOD) of 0.7 µM, repeatability of 6.4% (n = 10), and suitable recovery values at three concentration levels (98.5% (1.5 µM), 99.9% (3.5 µM), and 99.2% (7.5 µM)) for wastewater samples. The sensor provided a working range of 0.5-15 µM for synthetic urine samples, with an LOD of 0.4 µM and a repeatability of 7.4% (n = 10) and recovery values of 93.7%, 92.9%, and 98.0% for 1.0 µM, 3.5 µM, and 10 µM, respectively. In conclusion, our single-vessel synthesis approach for Si-FMIPs proved to be highly effective for the selective determination of captopril in wastewater and synthetic urine samples.
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Affiliation(s)
- Weida Rodrigues Silva
- Institute of Chemistry, Federal University of Uberlândia (UFU), Uberlândia, MG, Brazil
| | | | - Maria Del Pilar Taboada Sotomayor
- Institute of Chemistry, São Paulo State University (UNESP) and National Institute of Alternative Technologies for Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactive Agents (INCT-DATREM), Araraquara, 14801-970, Brazil
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2
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Derayea SM, Nagy DM, Badr El-Din KM, Attia TZ, Samir E, Mohamed AA, Hamad AA. Green innovative fluorescence approach for the feasible and reliable assay of thiol-containing drugs; captopril as a model. RSC Adv 2022; 12:17607-17616. [PMID: 35765458 PMCID: PMC9194952 DOI: 10.1039/d2ra02408j] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 06/05/2022] [Indexed: 11/21/2022] Open
Abstract
In the present study, a novel spectrofluorimetric approach was designed for the analysis of captopril as a thiol-containing compound. The approach is based on the formation of a ternary fluorescent compound between the target thiol compound, ortho-phthaldehyde, and a suitable primary amine-containing compound. The produced 1-thio-alkyl-isoindole derivative exhibited very high emission activity in a faintly alkaline aqueous solution that could be monitored at 448 nm (excitation at 334 nm). 2-Amino-6-methyl-6-hydroxy-heptane was selected as the primary amine candidate that gave the high fluorescence intensity with the stability of the formed product. At the optimal experimental condition, the intensity of fluorescence of the formed product was linearly related to the concentration of captopril in 20-450 ng mL-1 range. Commercial pharmaceutical tablets were analyzed, and the obtained results agreed with those of the published method regarding precision and accuracy. The mechanism of the reaction was discussed. In addition, the greenness of the approach was rated following eco-scale criteria.
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Affiliation(s)
- Sayed M Derayea
- Analytical Chemistry Department, Faculty of Pharmacy, Minia University 61519-Minia Egypt
| | - Dalia M Nagy
- Analytical Chemistry Department, Faculty of Pharmacy, Minia University 61519-Minia Egypt
| | - Khalid M Badr El-Din
- Analytical Chemistry Department, Faculty of Pharmacy, Minia University 61519-Minia Egypt
| | - Tamer Z Attia
- Analytical Chemistry Department, Faculty of Pharmacy, Minia University 61519-Minia Egypt
| | - Ebtihal Samir
- Analytical Chemistry Department, Faculty of Pharmacy, Deraya University New-Minia 61519-Minia Egypt
| | - Abobakr A Mohamed
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Fayoum University Fayoum Egypt
| | - Ahmed A Hamad
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University Assiut Branch Assiut 71524 Egypt
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3
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Wang Q, Zhang Z, Yang T, Han Y, Cheng Y, Wu J, Bai J, Ma C, Niu Y, Shuang S. Multiple fluorescence quenching effects mediated fluorescent sensing of captopril Based on amino Acids-Derivative carbon nanodots. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 269:120742. [PMID: 34952441 DOI: 10.1016/j.saa.2021.120742] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 11/24/2021] [Accepted: 12/09/2021] [Indexed: 06/14/2023]
Abstract
Carbon nanodots (CNDs) were facilely synthesized through a pyrolysis procedure with histamine, an amino acid rich in element carbon and nitrogen, being the precursor. Taking advantage of the favorable fluorescence performance of CNDs, a multiple fluorescence quenching effects mediated fluorescent sensor was established for captopril (CAP) detection. MnO2 NPs were firstly combined with CNDs via electrostatic attraction and subsequently quenched the fluorescence. The quenching mechanisms were concluded to be the combined effects of fluorescence resonance energy transfer (FRET) and inner filtration effect (IFE). Subsequently CAP triggered a unique redox reaction and decomposed the quencher so that renewed the fluorescence. Hence, the sensitive and selective detection of CAP was achieved through the indication of fluorescence recovery efficiency. A proportional range of 0.4 ∼ 60 μmol L-1 with the LOD of 0.31 μmol L-1 was obtained. The sensor was further applied to the real sample detection and the satisfactory results revealed the practical value of CNDs. The facile synthesis of CNDs and brand-new sensing mechanism made it a novel fluorescent method and could improve the analysis of CAP.
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Affiliation(s)
- Qi Wang
- Chemistry & Chemical Engineering Department, Department of Environment and Safety Engineering, Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, PR China.
| | - Ziru Zhang
- Chemistry & Chemical Engineering Department, Department of Environment and Safety Engineering, Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, PR China
| | - Tian Yang
- Chemistry & Chemical Engineering Department, Department of Environment and Safety Engineering, Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, PR China
| | - Yejiao Han
- Chemistry & Chemical Engineering Department, Department of Environment and Safety Engineering, Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, PR China
| | - Ying Cheng
- Chemistry & Chemical Engineering Department, Department of Environment and Safety Engineering, Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, PR China
| | - Jiana Wu
- Chemistry & Chemical Engineering Department, Department of Environment and Safety Engineering, Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, PR China
| | - Jingjing Bai
- Chemistry & Chemical Engineering Department, Department of Environment and Safety Engineering, Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, PR China
| | - Chunlei Ma
- Chemistry & Chemical Engineering Department, Department of Environment and Safety Engineering, Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, PR China
| | - Yulan Niu
- Chemistry & Chemical Engineering Department, Department of Environment and Safety Engineering, Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, PR China
| | - Shaomin Shuang
- College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China.
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4
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A novel non-enzymatic sensor for prostate cancer biomarker sensing based on electrocatalytic oxidation of sarcosine at nanostructured NiMn 2O 4 impregnated carbon paste electrode. Anal Chim Acta 2021; 1186:339121. [PMID: 34756269 DOI: 10.1016/j.aca.2021.339121] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 09/18/2021] [Accepted: 09/25/2021] [Indexed: 11/23/2022]
Abstract
This work addresses the electrocatalytic activity of a binary metal oxide catalyst of NiMn2O4 for electroxidation of sarcosine, the well-known prostate cancer biomarker. The nanocatalyst described was prepared via hydrothermal synthesis route, followed by calcination at 800 °C. Field emission scanning electron microscopy and X-ray diffraction were applied to obtain information about the material morphology and structure. A carbon paste electrode modified with nano-NiMn2O4 showed unique catalytic activity in sarcosine electroxidation which led to a significant rise in oxidation current (about four times) in comparison with the blank electrode. However, the carbon paste electrodes containing single oxides of NiO and Mn2O3 exhibited no considerable enhancement in sarcosine signal. The cyclic voltammetry results indicated that the Mn3+/Mn4+ couple was responsible for sarcosine oxidation, and NiO may enhance the content of Mn4+species in NiMn2O4 material. The carbon paste-based NiMn2O4 electrode was applied in the sensitive determination of sarcosine in the concentration range of 0.01-5.0 μM with the relative standard deviation of 3.49% (n = 5). The detection limit and quantification limit of the probe were determined to be 3.8 and 12 nM, respectively. The remarkable sensitivity and high selectivity of the method approved the sensor applicability in measurement of sarcosine content in urine samples.
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Saedi H, Fat'hi MR, Zargar B. An
effervescence‐assisted
dispersive liquid–liquid micro‐extraction of captopril based on hydrophobic deep eutectic solvent. J CHIN CHEM SOC-TAIP 2021. [DOI: 10.1002/jccs.202100134] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hamide Saedi
- Department of Chemistry, Faculty of Science Shahid Chamran University of Ahvaz Ahvaz Iran
| | - Mohammad Reza Fat'hi
- Department of Chemistry, Faculty of Science Shahid Chamran University of Ahvaz Ahvaz Iran
| | - Behrooz Zargar
- Department of Chemistry, Faculty of Science Shahid Chamran University of Ahvaz Ahvaz Iran
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6
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Saleemi M, Kong Y, Yong P, Wong E. An overview of recent development in therapeutic drug carrier system using carbon nanotubes. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101855] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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7
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Mahesar SA, Lakho SA, Hussain Sherazi ST, Kazi HA, Ahmed Abro K, Soomro RA, Bunaciu AA. Recent Progress in the Analysis of Captopril Using Electrochemical Methods: A Review. CURR ANAL CHEM 2019. [DOI: 10.2174/1573411014666180510151528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Captopril is the synthetic dipeptide used as an angiotensin converting enzyme
inhibitor. Captopril is used to treat hypertension as well as for the treatment of moderate heart failure.
Analytical instrumentation and methodology plays an important role in pharmaceutical analysis.
Methods:
This review presents some important applications of electrochemical modes used for the
analysis of captopril. So far captopril has been analyzed by using different bare and modified working
electrodes with a variety of modifiers from organic and inorganic materials to various types of nano
particles/materials.
Results:
This paper presents some of the methods which have been published in the last few years i.e.
from 2003 to 2016. This review highlights the role of the analytical instrumentation, particularly electrochemical
methods in assessing captopril using various working electrodes.
Conclusion:
A large number of studies on voltammetry noted by means of various bare and modified
electrodes. Among all of the published voltammetric methods, DPV, SWV, CV and miscellaneous
modes were trendy techniques used to analyze captopril in pharmaceutical formulations as well as biological
samples. Electrodes modified with nanomaterials are promising sensing tools as this showed
high sensitivity, good accuracy with precision as well as selectivity. In comparison to chromatographic
methods, the main advantages of electrochemical methods are its cheaper instrumentation, lower detection
limit and minimal or no sample preparation.
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Affiliation(s)
- Sarfaraz Ahmed Mahesar
- National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro-76080, Pakistan
| | - Saeed Ahmed Lakho
- National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro-76080, Pakistan
| | | | - Hamid Ali Kazi
- Department of Pharmacy, Shah Abdul Latif University, Khairpur-66111, Pakistan
| | - Kamran Ahmed Abro
- Pakistan Council of Scientific and Industrial Research Laboratories Complex, Pharmaceutical Research Center, Karachi-75280, Pakistan
| | - Razium Ali Soomro
- National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro-76080, Pakistan
| | - Andrei A. Bunaciu
- AAB_IRresearch Laboratory, 7 Modoran Ene Street, BlM92, apt. 96, Bucharest - 5, 051832, Romania
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8
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Mohamed MA, Fekry AM, El-Shal MA, Banks CE. Incorporation of Tetrazolium Blue (TB)/Gold Nanoparticles (GNPs) into Carbon Paste Electrode: Application as an Electrochemical Sensor for the Sensitive and Selective Determination of Sotalol in Micellar Medium. ELECTROANAL 2017. [DOI: 10.1002/elan.201700359] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Mona A. Mohamed
- Pharmaceutical Chemistry Department; National Organization for Drug Control and Research (NODCAR); Giza Egypt
| | - Amany M. Fekry
- Chemistry Department, Faculty of Science; Cairo University; Giza- 12613 Egypt
| | - Manal A. El-Shal
- Pharmaceutical Chemistry Department; National Organization for Drug Control and Research (NODCAR); Giza Egypt
| | - Craig E. Banks
- Faculty of Science and Engineering; Manchester Metropolitan University; Chester Street Manchester M1 5GD UK
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9
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A hydrogen peroxide sensor based on TNM functionalized reduced graphene oxide grafted with highly monodisperse Pd nanoparticles. Anal Chim Acta 2017; 989:88-94. [PMID: 28915946 DOI: 10.1016/j.aca.2017.07.051] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 07/13/2017] [Accepted: 07/21/2017] [Indexed: 11/22/2022]
Abstract
Addressed herein, we report the synthesis and characterization of a tert-nonyl mercaptan (TNM) functionalized reduced graphene oxide (rGO) supported palladium (Pd) nanoparticles (NPs) (Pd/TNM@rGO) as electrochemical sensor. The highly monodisperse Pd/TNM@rGO nanocomposite was applied for electrochemical determination of hydrogen peroxide (H2O2) at a potential range of -0.6 to +0.8 V. The Pd/TNM@rGO sensor demonstrated very high activity, sensitivity, reusability and durability toward H2O2 sensing. The well dispersed Pd/TNM@rGO nanocomposite has been characterized by using several analytical techniques such as, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), electron energy loss spectroscopy (EELS) and electrochemical impedance spectroscopy (EIS). The catalytic performance of prepared biosensor was also characterized by using cyclic voltammetry (CV) and chronoamperometry (CA) methods. The proposed H2O2 biosensor showed a broad linear range up to 12 mM, and a very low detection limit of 0.0025 μM, with a quick response time of less than 10 s. Additionally, the biosensor exhibited great capability, reproducibility and durability for the examination of H2O2.
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10
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Karimi-Maleh H, Ganjali MR, Norouzi P, Bananezhad A. Amplified nanostructure electrochemical sensor for simultaneous determination of captopril, acetaminophen, tyrosine and hydrochlorothiazide. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 73:472-477. [DOI: 10.1016/j.msec.2016.12.094] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 12/16/2016] [Accepted: 12/19/2016] [Indexed: 01/03/2023]
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11
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Modification of carbon paste electrode with NiO/graphene oxide nanocomposite and ionic liquids for fabrication of high sensitive voltammetric sensor on sulfamethoxazole analysis. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.05.001] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Dias IARB, Costa WM, Cervini P, Cavalheiro ETG, Marques ALB. Ruthenium Hexacyanoferrate (III) Modified Glassy Carbon Electrode for Determination of Captopril. ELECTROANAL 2016. [DOI: 10.1002/elan.201600107] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- I. A. R. B. Dias
- CCET/NEPE-LPQA; Universidade Federal do Maranhão; Av. dos Portugueses, SNP CEP 65.080-040 São Luís - MA Brasil
| | - W. M. Costa
- CCET/NEPE-LPQA; Universidade Federal do Maranhão; Av. dos Portugueses, SNP CEP 65.080-040 São Luís - MA Brasil
| | - P. Cervini
- Departamento de Química e Física Molecular; Instituto de Química de São Carlos; Av. Trabalhador São-Carlense, 400, Centro São Carlos, São Paulo CEP 13566-590 Brazil
| | - E. T. G. Cavalheiro
- Departamento de Química e Física Molecular; Instituto de Química de São Carlos; Av. Trabalhador São-Carlense, 400, Centro São Carlos, São Paulo CEP 13566-590 Brazil
| | - A. L. B. Marques
- CCET/NEPE-LPQA; Universidade Federal do Maranhão; Av. dos Portugueses, SNP CEP 65.080-040 São Luís - MA Brasil
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13
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Shanbedi M, Heris SZ, Amiri A, Eshghi H. Synthesis of water-soluble Fe-decorated multi-walled carbon nanotubes: A study on thermo-physical properties of ferromagnetic nanofluid. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2015.10.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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14
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Voltammetric Detection of Captopril Using Copper(II) and an Unmodified Glassy Carbon Electrode. ELECTROANAL 2016. [DOI: 10.1002/elan.201501156] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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15
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Fabrication of graphene/gold-modified screen-printed electrode for detection of carcinoembryonic antigen. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 58:666-74. [DOI: 10.1016/j.msec.2015.09.010] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 08/21/2015] [Accepted: 09/03/2015] [Indexed: 11/22/2022]
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16
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17
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Ghoreishi SM, Karamali E, Khoobi A, Enhessari M. Preparation of a manganese titanate nanosensor: Application in electrochemical studies of captopril in the presence of para-aminobenzoic acid. Anal Biochem 2015; 487:49-58. [DOI: 10.1016/j.ab.2015.07.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 07/11/2015] [Accepted: 07/14/2015] [Indexed: 10/23/2022]
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18
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Ribeiro PRDS, Pezza HR, Pezza L, Lima LS, Tubino M. Development and application of a portable instrument for drugs analysis in pharmaceutical preparations. BRAZ J PHARM SCI 2015. [DOI: 10.1590/s1984-82502015000300022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This article describes the application and performance of an inexpensive, simple and portable device for colorimetric quantitative determination of drugs in pharmaceutical preparations. The sensor is a light detector resistor (LDR) incorporated into a black PTFE cell and coupled to a low-cost multimeter (Ohmmeter). Quantitative studies were performed with captopril/p-chloranil/H2O2 and methyldopa/ammonium molybdate systems. Calibration curves were obtained by plotting the electrical resistance of the LDR against the concentration of the colored species in the ranges 1.84 × 10-4 to 1.29 × 10-3mol L-1 and 5.04 × 10-4 to 2.52 × 10-3 mol L-1 for captopril/p-chloranil/H2O2 and methyldopa/ammonium molybdate systems, respectively, exhibiting good coefficients of determination. Statistical analysis of the results obtained showed no significant difference between the proposed methodologies and the official reported methods, as evidenced by the t-test and variance ratio at a 95% confidence level. The results of this study demonstrate the applicability of the instrument for simple, accurate, precise, fast,in situ and low-cost colorimetric analysis of drugs in pharmaceutical products.
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19
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Fouladgar M, Karimi-Maleh H, Gupta VK. Highly sensitive voltammetric sensor based on NiO nanoparticle room temperature ionic liquid modified carbon paste electrode for levodopa analysis. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.04.023] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Tavakkoli N, Soltani N, Khorshidi E. Fabrication of Ru–Pd bimetallic monolayer on nanoporous gold film electrode with excellent electrocatalytic performance towards captopril oxidation. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.01.219] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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21
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Shabani-Nooshabadi M, Tahernejad-Javazmi F. Electrocatalytic Determination of Hydroxylamine in the Presence of Thiosulfate in Water and Wastewater Samples Using a Nanostructure Modified Carbon Paste Electrode. ELECTROANAL 2015. [DOI: 10.1002/elan.201500046] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Lee PT, Compton RG. Precursor Modified Electrodes: Electrochemical Detection of Captopril. ELECTROANAL 2015. [DOI: 10.1002/elan.201500093] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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23
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Paimard G, Gholivand MB, Shamsipur M, Gholivand K, Mohammadi-Behzad L, Gholami A, Barati A. Fabrication of a highly sensitive amperometric sensor using 1,4-phenylene-N,N′-bis (O,O-diphenylphoramidate)/CdS quantum dots/multi-walled carbon nanotubes for nanomolar detection of captopril. J Electroanal Chem (Lausanne) 2015. [DOI: 10.1016/j.jelechem.2014.12.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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24
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Liquid phase determination of isuprel in pharmaceutical and biological samples using a nanostructure modified carbon paste electrode. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2014.10.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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25
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Asghari A, Ghaderi O, Rajabi M, Ameri M, Amoozadeh A. Mechanistic and Electrochemical Investigation of Catechol Oxidation in the Presence of Thioacetamide: Application for Voltammetric Determination of Thioacetamide in Aqueous Media. PROGRESS IN REACTION KINETICS AND MECHANISM 2015. [DOI: 10.3184/146867815x14199576102955] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Electrochemical oxidation of catechol has been studied in the presence of thioacetamide (TAM) in a phosphate buffer solution (0.2 mol L−1, pH=6.0) at the surface of glassy carbon electrode by means of cyclic voltammetry. After the cyclic voltammetric investigation of the reaction mechanism of TAM with catechol, TAM has been determinated by means of the differential pulse voltammetry technique. The results showed that the cathodic peak current of catechol reduced in the presence of various concentrations of TAM and that catechol can participate in a 1,4-Michael addition reaction with TAM under an EC mechanism. The decreasing of the cathodic current of catechol showed a linear relationship with the TAM concentration that can be used for the determination of TAM with a detection limit less than 3 μmol L−1.
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Affiliation(s)
- Alireza Asghari
- Department of Chemistry, Semnan University, Semnan 35195-363, Iran
| | - Omid Ghaderi
- Department of Chemistry, Semnan University, Semnan 35195-363, Iran
| | - Maryam Rajabi
- Department of Chemistry, Semnan University, Semnan 35195-363, Iran
| | - Mohsen Ameri
- Department of Chemistry, Semnan University, Semnan 35195-363, Iran
| | - Ali Amoozadeh
- Department of Chemistry, Semnan University, Semnan 35195-363, Iran
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26
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Salama NN, Azab SM, Mohamed MA, Fekry AM. A novel methionine/palladium nanoparticle modified carbon paste electrode for simultaneous determination of three antiparkinson drugs. RSC Adv 2015. [DOI: 10.1039/c4ra15909h] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple and novel method for the simultaneous determination of entacapone (EN), levodopa (LD) and carbidopa (CD) based on a methionine/palladium nanoparticle modified carbon paste electrode is described.
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Affiliation(s)
- Nahla N. Salama
- Pharmaceutical Chemistry Dept
- National Organization for Drug Control and Research [NODCAR]
- Giza
- Egypt
| | - Shereen M. Azab
- Pharmaceutical Chemistry Dept
- National Organization for Drug Control and Research [NODCAR]
- Giza
- Egypt
| | - Mona A. Mohamed
- Pharmaceutical Chemistry Dept
- National Organization for Drug Control and Research [NODCAR]
- Giza
- Egypt
| | - Amany M. Fekry
- Chemistry Department
- Faculty of Science
- Cairo University
- Giza-12613
- Egypt
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Bagheri H, Karimi-Maleh H, Karimi F, Mallakpour S, Keyvanfard M. Square wave voltammetric determination of captopril in liquid phase using N-(4-hydroxyphenyl)-3,5-dinitrobenzamide modified ZnO/CNT carbon paste electrode as a novel electrochemical sensor. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2014.06.027] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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28
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Karimi-Maleh H, Tahernejad-Javazmi F, Ensafi AA, Moradi R, Mallakpour S, Beitollahi H. A high sensitive biosensor based on FePt/CNTs nanocomposite/N-(4-hydroxyphenyl)-3,5-dinitrobenzamide modified carbon paste electrode for simultaneous determination of glutathione and piroxicam. Biosens Bioelectron 2014; 60:1-7. [DOI: 10.1016/j.bios.2014.03.055] [Citation(s) in RCA: 249] [Impact Index Per Article: 24.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Revised: 03/11/2014] [Accepted: 03/26/2014] [Indexed: 11/16/2022]
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29
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Pahlavan A, Karimi-Maleh H, Karimi F, Amiri MA, Khoshnama Z, Shahmiri MR, Keyvanfard M. Application of CdO nanoparticle ionic liquid modified carbon paste electrode as a high sensitive biosensor for square wave voltammetric determination of NADH. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 45:210-5. [PMID: 25491822 DOI: 10.1016/j.msec.2014.09.013] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Revised: 08/17/2014] [Accepted: 09/11/2014] [Indexed: 10/24/2022]
Abstract
In this paper we report the synthesis and application of CdO nanoparticle (CdO/NPs) and 1,3-dipropylimidazolium bromide as high sensitive sensors for voltammetric determination of nicotinamide adenine dinucleotide (NADH) using carbon paste electrode. The cyclic voltammogram showed an irreversible oxidation peak at 0.68 V (vs. Ag/AgClsat), which corresponded to the oxidation of NADH. Compared to common carbon paste electrode, the electrochemical response was greatly improved for NADH electrooxidation at a surface of CdO/NP modified ionic liquid carbon paste electrode (IL/CdO/NP/CPE). The linear response range and detection limit were found to be 0.09-750 μmol L(-1) and 0.05 μmol L(-1), respectively. Result shows that other physiological species did not interfere in the determination of NADH at the surface of the proposed sensor in the optimum condition. The proposed sensor was successfully applied for the determination of NADH in tap water, urine and pharmaceutical serum samples.
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Affiliation(s)
- Ali Pahlavan
- Department of Physics, Sari Branch, Islamic Azad University, Sari, Iran.
| | - Hassan Karimi-Maleh
- Department of Chemistry, Graduate University of Advanced Technology, Kerman, Iran.
| | - Fatemeh Karimi
- Department of Chemistry, Majlesi Branch, Islamic Azad University, Isfahan, Iran
| | - Mohsen Aboukazempour Amiri
- Department of Biotechnology, Faculty of Chemical engineering, Mazandaran University of Science & Technology (MUST), Babol, Iran
| | - Zahra Khoshnama
- Department of Physics, Mazandaran Science and Research Branch, Mazandaran, Iran
| | | | - Mohsen Keyvanfard
- Department of Chemistry, Majlesi Branch, Islamic Azad University, Isfahan, Iran
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Goodarzian M, Khalilzade MA, Karimi F, Kumar Gupta V, Keyvanfard M, Bagheri H, Fouladgar M. Square wave voltammetric determination of diclofenac in liquid phase using a novel ionic liquid multiwall carbon nanotubes paste electrode. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2014.04.037] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Najafi M, Khalilzadeh MA, Karimi-Maleh H. A new strategy for determination of bisphenol A in the presence of Sudan I using a ZnO/CNTs/ionic liquid paste electrode in food samples. Food Chem 2014; 158:125-31. [DOI: 10.1016/j.foodchem.2014.02.082] [Citation(s) in RCA: 174] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Revised: 02/13/2014] [Accepted: 02/18/2014] [Indexed: 01/31/2023]
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Keyvanfard M, Ahmadi M, Karimi F, Alizad K. Voltammetric determination of cysteamine at multiwalled carbon nanotubes paste electrode in the presence of isoproterenol as a mediator. CHINESE CHEM LETT 2014. [DOI: 10.1016/j.cclet.2014.05.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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33
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ZnO Nanoparticle Ionic Liquids Carbon Paste Electrode as a Voltammetric Sensor for Determination of Sudan I in the Presence of Vitamin B6 in Food Samples. FOOD ANAL METHOD 2014. [DOI: 10.1007/s12161-014-9962-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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34
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Karimi-Maleh H, Tahernejad-Javazmi F, Gupta VK, Ahmar H, Asadi MH. A novel biosensor for liquid phase determination of glutathione and amoxicillin in biological and pharmaceutical samples using a ZnO/CNTs nanocomposite/catechol derivative modified electrode. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2014.03.049] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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35
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A Voltammetric Sensor for Simultaneous Determination of Vitamin C and Vitamin B6 in Food Samples Using ZrO2 Nanoparticle/Ionic Liquids Carbon Paste Electrode. FOOD ANAL METHOD 2014. [DOI: 10.1007/s12161-014-9926-3] [Citation(s) in RCA: 116] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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36
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A novel nanosensor based on Pt:Co nanoalloy ionic liquid carbon paste electrode for voltammetric determination of vitamin B9 in food samples. Lebensm Wiss Technol 2014. [DOI: 10.1016/j.lwt.2014.01.023] [Citation(s) in RCA: 140] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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37
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Application of 3,4-dihydroxycinnamic acid as a suitable mediator and multiwall carbon nanotubes as a sensor for the electrocatalytic determination of L-cysteine. CHINESE JOURNAL OF CATALYSIS 2014. [DOI: 10.1016/s1872-2067(14)60065-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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38
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Karimi-Maleh H, Moazampour M, Ensafi AA, Mallakpour S, Hatami M. An electrochemical nanocomposite modified carbon paste electrode as a sensor for simultaneous determination of hydrazine and phenol in water and wastewater samples. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:5879-5888. [PMID: 24448883 DOI: 10.1007/s11356-014-2529-0] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Accepted: 01/04/2014] [Indexed: 06/03/2023]
Abstract
In this study, we report preparation of a high sensitive electrochemical sensor for determination of hydrazine in the presence of phenol in water and wastewater samples. In the first step, we describe synthesis and characterization of ZnO/CNTs nanocomposite with different methods such as transmission electron microscopy (TEM) and X-ray diffraction (XRD). In the second step, application of the synthesis nanocomposite describes the preparation of carbon paste electrode modified with N-(4-hydroxyphenyl)-3,5-dinitrobenzamide as a high sensitive and selective voltammetric sensor for determination of hydrazine and phenol in water and wastewater samples. The mediated oxidation of hydrazine at the modified electrode was investigated by cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy (EIS). Also, the values of catalytic rate constant (k) and diffusion coefficient (D) for hydrazine were calculated. Square wave voltammetry (SWV) of hydrazine at the modified electrode exhibited two linear dynamic ranges with a detection limit (3σ) of 8.0 nmol L(-1). SWV was used for simultaneous determination of hydrazine and phenol at the modified electrode and quantitation of hydrazine and phenol in some real samples by the standard addition method.
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Affiliation(s)
- Hassan Karimi-Maleh
- Department of Chemistry, Graduate University of Advanced Technology, Kerman, Iran,
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39
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An Electrochemical Nanosensor for Simultaneous Voltammetric Determination of Ascorbic Acid and Sudan I in Food Samples. FOOD ANAL METHOD 2014. [DOI: 10.1007/s12161-014-9867-x] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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40
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Karimi-Maleh H, Tahernejad-Javazmi F, Daryanavard M, Hadadzadeh H, Ensafi AA, Abbasghorbani M. Electrocatalytic and Simultaneous Determination of Ascorbic Acid, Nicotinamide Adenine Dinucleotide and Folic Acid at Ruthenium(II) Complex-ZnO/CNTs Nanocomposite Modified Carbon Paste Electrode. ELECTROANAL 2014. [DOI: 10.1002/elan.201400013] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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41
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Keyvanfard M, Tahmasbi M, Karimi-Maleh H, Alizad K. A voltammetric sensor with a multiwall carbon nanotube paste electrode and naphthol green as a mediator for the determination of N-actylcysteine in the presence of tryptophan. CHINESE JOURNAL OF CATALYSIS 2014. [DOI: 10.1016/s1872-2067(14)60019-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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42
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Rastegarzadeh S, Hashemi F. A surface plasmon resonance sensing method for determining captopril based on in situ formation of silver nanoparticles using ascorbic acid. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 122:536-541. [PMID: 24334017 DOI: 10.1016/j.saa.2013.11.074] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 11/10/2013] [Accepted: 11/13/2013] [Indexed: 06/03/2023]
Abstract
A new method has been proposed to sensitive detection of captopril based on surface plasmon resonance band of silver nanoparticles (AgNPs). The stable and well-dispersed AgNPs with strong plasmon resonance signal were synthesized in situ using a simple and rapid procedure by applying ascorbic acid as reducer and sodium dodecyl sulfate as stabilizer, at room temperature. It was found that, the decreasing of AgNPs plasmon absorbance is proportional to the concentration of captopril which allows the spectrophotometric sensing of this compound. The presented method is capable of determining captopril over a range of 0.20-2.75 μmol L(-1) with a limit of detection 0.07 μmol L(-1). The relative standard deviation for eight replicate measurements of 1.00 and 2.50 μmol L(-1) of captopril was 2.37% and 1.02%, respectively. The method was applied to the determination of captopril in pharmaceutical formulations with satisfactory results, which were in agreement with those of the official method.
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Affiliation(s)
- Saadat Rastegarzadeh
- Department of Chemistry, College of Science, Shahid Chamran University, Ahvaz 6135743135, Iran.
| | - Fatemeh Hashemi
- Department of Chemistry, College of Science, Shahid Chamran University, Ahvaz 6135743135, Iran
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43
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Pahlavan A, Gupta VK, Sanati AL, Karimi F, Yoosefian M, Ghadami M. ZnO/CNTs nanocomposite/ionic liquid carbon paste electrode for determination of noradrenaline in human samples. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.01.006] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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44
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Hasanzadeh M, Pournaghi-Azar MH, Shadjou N, Jouyban A. Electropolymerization of taurine on gold surface and its sensory application for determination of captopril in undiluted human serum. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 38:197-205. [PMID: 24656369 DOI: 10.1016/j.msec.2014.01.051] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 12/30/2013] [Accepted: 01/29/2014] [Indexed: 10/25/2022]
Abstract
Polytaurine film was electrodeposited on gold (Au) electrode through cyclic voltammetry from taurine and phosphate buffer solution. The electrocatalytic effect of polytaurine modified Au (PT/Au) electrode was investigated for electro-oxidation of captopril (CAP). Electrocatalytical activity of PT/Au electrode was studied using cyclic voltammetry (CV), chronoamperometry and differential pulse voltammetry (DPV). DPV was used to evaluate the analytical performance of CAP in the presence of phosphate buffer solution and good limit of detection was obtained by this sensor. The experimental conditions influencing the determination of CAP were optimized and under optimal conditions, the oxidation peak current was proportional to CAP concentration in the range of 0.06-0.2 μM, while the detection limit was 0.03 μM (S/N=3). The results revealed that PT promotes the rate of oxidation by increasing the peak current. Finally, the applicability of the method to direct assay of human serum is described. The proposed sensor was successfully applied to determine cadaverine in fish samples, yielding satisfactory results. The spiked recoveries were in the range of 96.0-105.0%.
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Affiliation(s)
- Mohammad Hasanzadeh
- Drug Applied Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz 51664, Iran
| | | | - Nasrin Shadjou
- Biochemistry Department, Genetic and Metabolism Group, Pasteur Institute of Iran, P.O. Box 13164 Tehran, Iran
| | - Abolghasem Jouyban
- Drug Applied Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz 51664, Iran.
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Multiwall carbon nanotube paste electrode with 3,4-dihydroxy-cinnamic acid as mediator for the determination of glutathione in pharmaceutical and urine samples. CHINESE JOURNAL OF CATALYSIS 2013. [DOI: 10.1016/s1872-2067(12)60661-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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46
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Permanganate–bromide–silver nanoparticles as a new chemiluminescence system and its application to captopril determination. Talanta 2013; 115:600-5. [DOI: 10.1016/j.talanta.2013.06.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Revised: 06/11/2013] [Accepted: 06/12/2013] [Indexed: 12/12/2022]
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47
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A modified single-walled carbon nanotubes/carbon-ceramic electrode for simultaneous voltammetric determination of paracetamol and caffeine. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2013. [DOI: 10.1007/s13738-013-0324-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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48
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Development and validation of a simple and sensitive HPLC-UV method for the determination of captopril in human plasma using a new derivatizing reagent 2-naphthyl propiolate. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 932:144-51. [PMID: 23831707 DOI: 10.1016/j.jchromb.2013.06.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2013] [Revised: 05/15/2013] [Accepted: 06/12/2013] [Indexed: 11/23/2022]
Abstract
In this study, a simple, sensitive and reliable HPLC-UV method applying rapid sample preparation technique for the determination of captopril in human plasma was developed and validated. The method is based on pre-column derivatization of captopril and 2-propene-1-thiol (internal standard) with a new reagent 2-naphthyl propiolate. Sample clean-up, derivatization and extraction were carried out in two steps, totally less than 30min. The extracts were chromatographed on a C18 column (5μm, 150mm×4.6mmi.d.). The mobile phase consisted of methanol (75%, v/v) and phosphate buffer (25%, pH=8, 0.01M). UV detection was performed at 290nm. To obtain the best reaction yield, the factors that could influence the derivatization process, including the concentration of derivatization reagent, pH of sample solution and temperature were investigated in detail and optimized using Box-Behnken response surface methodology. Under optimized conditions the average extraction recovery of captopril and internal standard were >86%. The achieved lower limit of quantification (LLOQ) was 3ng/mL; the assay exhibited a linear dynamic range of 3-2000ng/mL with correlation coefficient (r(2)) of ≥0.99. The precision was satisfactory in the whole calibration range with RSD of 5.9-12.4% (accuracy: from 97.5% to 93.6%) and of 6.4-12.8% (accuracy: from 97.3% to 95.2%) for intra- and inter-assay, respectively. The method stability was confirmed in a series of experiments including: freeze-thaw, short- and long-term stability testing. Lastly, the developed method was successfully applied to the bioequivalence study of captopril administrated as a single oral dose (50mg) to 12 healthy male volunteers.
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Aoki PHB, Alessio P, Furini LN, Constantino CJL, Neves TTAT, Paulovich FV, de Oliveira MCF, Oliveira ON. Molecularly designed layer-by-layer (LbL) films to detect catechol using information visualization methods. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:7542-7550. [PMID: 23356548 DOI: 10.1021/la304544d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The control of molecular architectures has been exploited in layer-by-layer (LbL) films deposited on Au interdigitated electrodes, thus forming an electronic tongue (e-tongue) system that reached an unprecedented high sensitivity (down to 10(-12) M) in detecting catechol. Such high sensitivity was made possible upon using units containing the enzyme tyrosinase, which interacted specifically with catechol, and by processing impedance spectroscopy data with information visualization methods. These latter methods, including the parallel coordinates technique, were also useful for identifying the major contributors to the high distinguishing ability toward catechol. Among several film architectures tested, the most efficient had a tyrosinase layer deposited atop LbL films of alternating layers of dioctadecyldimethylammonium bromide (DODAB) and 1,2-dipalmitoyl-sn-3-glycero-fosfo-rac-(1-glycerol) (DPPG), viz., (DODAB/DPPG)5/DODAB/Tyr. The latter represents a more suitable medium for immobilizing tyrosinase when compared to conventional polyelectrolytes. Furthermore, the distinction was more effective at low frequencies where double-layer effects on the film/liquid sample dominate the electrical response. Because the optimization of film architectures based on information visualization is completely generic, the approach presented here may be extended to designing architectures for other types of applications in addition to sensing and biosensing.
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Affiliation(s)
- Pedro H B Aoki
- Faculdade de Ciências e Tecnologia, UNESP, Presidente Prudente, SP, Brazil
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Beitollahi H, Tajik S, Maleh HK, Hosseinzadeh R. Application of a 1-benzyl-4-ferrocenyl-1H-[1,2,3]-triazole/carbon nanotube modified glassy carbon electrode for voltammetric determination of hydrazine in water samples. Appl Organomet Chem 2013. [DOI: 10.1002/aoc.3001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Hadi Beitollahi
- Environment Department, Institute of Science and High Technology and Environmental Sciences; Graduate University of Advanced Technology; Kerman Iran
| | - Somayeh Tajik
- Department of Chemistry; Shahid Bahonar University of Kerman; Kerman Iran
- Young Researchers Society; Shahid Bahonar University of Kerman; Kerman Iran
| | - Hassan Karimi Maleh
- Department of Chemistry; Graduate University of Advanced Technology; Kerman Iran
| | - Rahman Hosseinzadeh
- Department of Organic Chemistry, Faculty of Chemistry; University of Mazandaran; Babolsar Iran
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