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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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Murillo Pulgarín JA, García Bermejo LF, Sánchez García MN, Sánchez-Ferrer Robles I. Innovative design of a methodology for the simultaneous determination of compounds by kinetic-spectroscopy three-dimensional chemiluminescence. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 230:118045. [PMID: 31955117 DOI: 10.1016/j.saa.2020.118045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 12/19/2019] [Accepted: 01/06/2020] [Indexed: 06/10/2023]
Abstract
This report presents a novel methodology based in the quickly acquisition of full UV-vis range spectra combined with the joint determination of kinetic parameters and chemiluminescence signals. Then this technique allows obtaining three-dimensional chemiluminescence spectra profiles containing kinetic and spectroscopic information. That is especially useful for resolving mixtures of luminophors because of more analytical information for each analyte is available increasing the selectivity relative to conventional chemiluminescence methods. To accomplish this, a conventional Back-Thinned CCD detector is used and the three-dimensional chemiluminescence spectra is subsequently processed so that two-dimensional spectra with different trajectories can be obtained by dedicated software CLTotal. The potential of the proposed analytical methodology was assessed for the simultaneous determination of two polycyclic aromatic hydrocarbons. The chemiluminescent reaction between DNPO and hydrogen peroxide induced by their presence was used to record 3D spectra and the software CLTotal to subsequently construct linear variable-angle trajectories in the spectra, in order to obtain more selective 2D spectra facilitating the simultaneous determination of the analytes. The results of the statistical analysis testify to the usefulness of the proposed method for the intended purpose.
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Affiliation(s)
- José Antonio Murillo Pulgarín
- Department of Analytical Chemistry and Foods Technology, University of Castilla-La Mancha, 13071 Ciudad Real, Spain.
| | - Luisa F García Bermejo
- Department of Analytical Chemistry and Foods Technology, University of Castilla-La Mancha, 13071 Ciudad Real, Spain
| | - M Nieves Sánchez García
- Department of Analytical Chemistry and Foods Technology, University of Castilla-La Mancha, 13071 Ciudad Real, Spain
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Headspace single-drop microextraction coupled to microchip-photothermal lens microscopy for highly sensitive determination of captopril in human serum and pharmaceuticals. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2266-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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4
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Shokoufi N, Abbasi-Ahd A, Kargosha K. Laser induced thermal lens microscopy for highly sensitive determination of captopril. APPLIED OPTICS 2017; 56:E58-E63. [PMID: 28414342 DOI: 10.1364/ao.56.000e58] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this work, a combined flow injection-photo thermal lens microscopy (FI-PTLM) system was used for highly sensitive determination of captopril as an angiotensin-converting enzyme inhibitor. Captopril has no absorption in the visible range, but due to its thiol group could interact with gold nanoparticles (GNPs). GNPs, because of their surface plasmon resonance (SPR), have absorption in the visible range, but their interaction with a low concentration of captopril shows no effective change in UV-Vis spectrophotometry because their aggregation is slight. On the contrary, at the same condition, the PTLM with a visible light source enables sensitive measurement of this compound. The thiol group of captopril binds to the surface of GNPs and decreases the SPR. At the optimum condition in the focal volume of 2.68 fL (f=10-15), the obtained range of linearity was 50-800 nM. The developed method was successfully applied for the determination of captopril in human serum and pharmaceutical samples.
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5
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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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6
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Lima MJA, Fernandes RN, Tanaka AA, Reis BF. Development of a new procedure for the determination of captopril in pharmaceutical formulations employing chemiluminescence and a multicommuted flow analysis approach. LUMINESCENCE 2015; 31:288-94. [PMID: 26136382 DOI: 10.1002/bio.2960] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 05/12/2015] [Accepted: 05/15/2015] [Indexed: 01/07/2023]
Abstract
This paper describes a new technique for the determination of captopril in pharmaceutical formulations, implemented by employing multicommuted flow analysis. The analytical procedure was based on the reaction between hypochlorite and captopril. The remaining hypochlorite oxidized luminol that generated electromagnetic radiation detected using a homemade luminometer. To the best of our knowledge, this is the first time that this reaction has been exploited for the determination of captopril in pharmaceutical products, offering a clean analytical procedure with minimal reagent usage. The effectiveness of the proposed procedure was confirmed by analyzing a set of pharmaceutical formulations. Application of the paired t-test showed that there was no significant difference between the data sets at a 95% confidence level. The useful features of the new analytical procedure included a linear response for captopril concentrations in the range 20.0-150.0 µmol/L (r = 0.997), a limit of detection (3σ) of 2.0 µmol/L, a sample throughput of 164 determinations per hour, reagent consumption of 9 µg luminol and 42 µg hypochlorite per determination and generation of 0.63 mL of waste. A relative standard deviation of 1% (n = 6) for a standard solution containing 80 µmol/L captopril was also obtained.
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Affiliation(s)
- Manoel J A Lima
- Departamento de Química, Universidade Federal do Maranhão, São Luís, Brazil
| | - Ridvan N Fernandes
- Departamento de Química, Universidade Federal do Maranhão, São Luís, Brazil
| | - Auro A Tanaka
- Departamento de Química, Universidade Federal do Maranhão, São Luís, Brazil
| | - Boaventura F Reis
- Centro de Energia Nuclear na Agricultura, Universidade de São Paulo, Piracicaba, Brazil
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7
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Smith ZM, Terry JM, Barnett NW, Gray LJ, Wright DJ, Francis PS. Enhancing permanganate chemiluminescence detection for the determination of glutathione and glutathione disulfide in biological matrices. Analyst 2015; 139:2416-22. [PMID: 24691543 DOI: 10.1039/c4an00255e] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Acidic potassium permanganate chemiluminescence enables direct post-column detection of glutathione, but its application to assess the redox state of a wider range of biological fluids and tissues is limited by its sensitivity. Herein we show that the simple on-line addition of an aqueous formaldehyde solution not only enhances the sensitivity of the procedure by two orders of magnitude, but also provides a remarkable improvement in the selectivity of the reagent towards thiols such as glutathione (compared to phenols and amino acids that do not possess a thiol group). This enhanced mode of detection was applied to the determination of glutathione and its corresponding disulfide species in homogenised striatum samples taken from both wild type mice and the R6/1 transgenic mouse model of Huntington's disease, at both 8 and 12 weeks of age. No significant difference was observed between the GSH/GSSG ratios of wild type mice and R6/1 mice at either age group, suggesting that the early disease progression had not significantly altered the intracellular redox environment.
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Affiliation(s)
- Zoe M Smith
- Centre for Chemistry and Biotechnology, Faculty of Science, Engineering and Built Environment, Deakin University, Locked Bag 20000, Geelong, Victoria 3220, Australia.
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Guo J, Yang Y, Hu X, Li Y. Spectrofluorimetric analysis of captopril based on its obstruction effect of the nanomaterial surface energy transfer between acridine orange and gold nanoparticles. Sci China Chem 2015. [DOI: 10.1007/s11426-014-5291-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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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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10
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Karimi-Maleh H, Mehdipour-Ataei S, Hatami M, Khalilzadeh MA. Voltammetric determination of captopril using a novel ferrocene-based polyamide as a mediator and multi-wall carbon nanotubes as a sensor. JOURNAL OF ANALYTICAL CHEMISTRY 2014. [DOI: 10.1134/s106193481402004x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Huo S, Dong J, Song C, Xu J, Shen S, Ren Y, Shi T. Characterization of the reaction products, kinetics and mechanism of oxidation of the drug captopril by platinum(iv) complexes. RSC Adv 2014. [DOI: 10.1039/c3ra45020a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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12
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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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13
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El-Didamony AM. Spectrofluorimetric Determination of the Hypertensive Drug Captopril Based on Its Oxidation with Cerium(IV). J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200900112] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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14
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Wei X, Du L, Li D, Gong Q, Wang L, Lin Y. Spectral characteristic investigation on complex of Ni (II) with captopril and its analytical application. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 94:12-7. [PMID: 22510489 DOI: 10.1016/j.saa.2012.03.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2011] [Revised: 03/07/2012] [Accepted: 03/12/2012] [Indexed: 05/20/2023]
Abstract
In this paper, Ni (II) reacting with captopril (CPT) can form complex in alkaline solution and the formed complex has a characteristic absorption peak at 340nm. The absorbance of the Ni-CPT complex increases linearly with the increased concentration of captopril. The study also shows that ammonia has an obvious sensitizing effect on the absorbance. Based on the study, a new method for the determination of captopril is established. Experimental results show that the linear range of this method under optimum condition is 1.0-60mg/L with correlation coefficient, detection limit and precision of 0.9999, 0.31mg/L and 0.87%, respectively. The method used to determine captopril in commercial captopril tablets has a satisfactory result with the recoveries in the range of 99.0-103.6% and the relative standard deviation (RSD) in the range of 0.8-3.7%. We preliminarily study the reaction mechanism and demonstrate that the complex ratio of Ni (II) with captopril is 1:2 and the formation constant is 6.3×10(9).
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Affiliation(s)
- Xiaoling Wei
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
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15
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Vicentini FC, Suarez WT, Cavalheiro ÉTG, Fatibello-Filho O. Flow-injection spectrophotometric determination of captopril in pharmaceutical formulations using a new solid-phase reactor containing AgSCN immobilized in a polyurethane resin. BRAZ J PHARM SCI 2012. [DOI: 10.1590/s1984-82502012000200016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple flow-injection analysis procedure was developed for determining captopril in pharmaceutical formulations employing a novel solid-phase reactor containing silver thiocyanate immobilized in a castor oil derivative polyurethane resin. The method was based on silver mercaptide formation between the captopril and Ag(I) in the solid-phase reactor. During such a reaction, the SCN- anion was released and reacted with Fe3+, which generated the FeSCN2+ complex that was continuously monitored at 480 nm. The analytical curve was linear in the captopril concentration range from 3.0 × 10-4 mol L-1 to 1.1 × 10-3 mol L-1 with a detection limit of 8.0 × 10-5 mol L-1. Recoveries between 97.5% and 103% and a relative standard deviation of 2% for a solution containing 6.0 × 10-4 mol L-1 captopril (n = 12) were obtained. The sample throughput was 40 h-1 and the results obtained for captopril in pharmaceutical formulations using this procedure and those obtained using a pharmacopoeia procedure were in agreement at a 95% confidence level.
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Rodrigues SSM, Santos JLM. Chemiluminometric determination of captopril in a multi-pumping flow system. Talanta 2012; 96:210-5. [PMID: 22817952 DOI: 10.1016/j.talanta.2012.02.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Revised: 02/06/2012] [Accepted: 02/07/2012] [Indexed: 11/15/2022]
Abstract
In this work, a simple, versatile and fully automated analytical methodology for the chemiluminometric determination of captopril - an angiotensin II-converting-enzyme (ACE) inhibitor - in pharmaceutical formulations, is proposed. The developed methodology was based on the enhancement by captopril of the chemiluminescence emission of tris(2,2'-bipyridyl)ruthenium(II). In sulphuric acid medium tris(2,2'-bipyridyl)ruthenium(II) was oxidized by cerium(IV) and converted into a reactive oxidant specie [Ru(bpy)(3)](3+), which was subsequently reduced with captopril in order to yield a significant enhancement of the original chemiluminescence emission that was directly related to captopril concentration. The analytical process was implemented by resorting to an automated multi-pumping flow system (MPFS) that enabled the establishment of multiple reaction interfaces, which, in combination with the created pulsed flowing stream assured a fast and reproducible sample/reagent mixing and reaction development essential to guarantee the generation and subsequent measurement of the short-lived species involved in the chemiluminescent process. The developed system employed three solenoid micro-pumps as the only flow manifold active components. These assured the insertion, propelling and commuting of all solutions. The automatic actuation of the solenoid micro-pumps provided an easily programmed, operated and controlled analytical flow system, exhibiting high versatility, efficiency and compactness at a low cost. Under the optimized experimental conditions, the proposed method allowed the determination of captopril for concentrations between 2×10(-3) and 1.5×10(-1)mmolL(-1) (r=0.9996, n=6) and a sampling frequency of about 58 determinations per hour, producing 620μL of waste per determination. The results obtained for pharmaceutical formulations were statistically comparable to those provided by the reference procedure with a relative deviation between -2.32 and 1.39%. The possible mechanism of the chemiluminescence reaction was also discussed in this work.
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Affiliation(s)
- S Sofia M Rodrigues
- Requimte, Departamento de Ciências Químicas, Laboratório de Química Analítica e Físico-Química, Faculdade de Farmácia, Universidade do Porto, Rua Aníbal Cunha, n° 164, 4099-030 Porto, Portugal
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The new approach for captopril detection employing triangular gold nanoparticles-catalyzed luminol chemiluminescence. Talanta 2012; 89:142-8. [DOI: 10.1016/j.talanta.2011.12.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2011] [Revised: 11/21/2011] [Accepted: 12/01/2011] [Indexed: 11/20/2022]
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18
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Suarez WT, Pessoa-Neto OD, Janegitz BC, Vieira HJ, Faria RC, Fatibello-Filho O. Flow Injection Spectrophotometric Determination of N-Acetylcysteine and Captopril Employing Prussian Blue Generation Reaction. ANAL LETT 2011. [DOI: 10.1080/00032719.2010.551696] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Kinetic-spectrometric three-dimensional chemiluminescence as an effective analytical tool. Application to the determination of benzo(a)pyrene. Anal Chim Acta 2011; 691:76-82. [PMID: 21458634 DOI: 10.1016/j.aca.2011.02.049] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2010] [Revised: 02/17/2011] [Accepted: 02/17/2011] [Indexed: 11/22/2022]
Abstract
Kinetic and spectroscopic methods were used in combination in this work to develop a new analytical tool for use in chemiluminescence detection processes. Specifically, time-resolved chemiluminescence was used jointly with a stopped-flow assembly in order to monitor the chemiluminescence produced in the oxidation of bis(2,4-dinitrophenyl)oxalate (DNPO) by hydrogen peroxide in the presence of a polycyclic aromatic hydrocarbon. Recording of successive two-dimensional spectra during the emission process and treating the acquired spectral data with dedicated software allows the obtainment of three-dimensional chemiluminescence spectra, a result of the joint use of two analytical techniques. Thus, using a flow cell specifically designed for direct coupling to the charge-coupled device (CCD) detector increases the emission intensity without the need for fibre optics. Also, using dedicated software to process the acquired two-dimensional spectra affords a comprehensive kinetic and spectroscopic characterization of the chemiluminescence signal via the three-dimensional spectrum previously obtained. The analytical potential of this new tool was assessed by application to the chemiluminescent reaction between a peroxyoxalate and an oxidant (hydrogen peroxide); the reaction is induced by benzo(a)pyrene, which was used to determine this polycyclic aromatic hydrocarbon in an organic solvent. A linear calibration graph was obtained between 0.5 and 20 mg L(-1). The limit of detection found to be 3.97 μg L(-1) and a relative standard error of 0.64% and a relative standard deviation of 1.87% were obtained. The results reached testify to the usefulness of the proposed analytical tool for simple determinations and its potential for the resolution of complex mixtures or determinations in complex matrices.
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Yao HC, Sun M, Yang XF, Zhang ZZ, Li H. Simultaneous determination of captopril and hydrochlorothiazide by time-resolved chemiluminescence with artificial neural network calibration. J Pharm Anal 2011; 1:32-38. [PMID: 29403679 PMCID: PMC5760760 DOI: 10.1016/s2095-1779(11)70006-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2010] [Accepted: 08/01/2010] [Indexed: 10/25/2022] Open
Abstract
The combined use of chemometrics and chemiluminescence (CL) measurements, with the aid of the stopped-flow mixing technique, developed a simple time-resolved CL method for the simultaneous determination of captopril (CPL) and hydrochlorothiazide (HCT). The stopped-flow technique in a continuous-flow system was employed in this work in order to emphasize the kinetic differences between the two analytes in cerium (IV)-rhodamine 6G CL system. After the flow was stopped, an initial rise of CL signal was observed for HCT standards, while a direct decay of CL signal was obtained for CPL standards. The mixed CL signal was monitored and recorded on the whole process of continuousflow/stopped-flow, and the obtained data were processed by the chemometric approach of artificial neural network. The relative prediction error (RPE) of CPL and HCT was 5.9% and 8.7%, respectively. The recoveries of CPL and HCT in tablets were found to fall in the range between 95% and 106%. The proposed method was successfully applied to the simultaneous determination of CPL and HCT in a compound pharmaceutical formulation.
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Affiliation(s)
- Han-Chun Yao
- School of Pharmaceutical Science, Zhengzhou University, Zhengzhou 450001, China
| | - Min Sun
- School of Pharmaceutical Science, Zhengzhou University, Zhengzhou 450001, China
| | - Xiao-Feng Yang
- Department of Chemistry, Northwest University, Xi'an 710069, China
| | - Zhen-Zhong Zhang
- School of Pharmaceutical Science, Zhengzhou University, Zhengzhou 450001, China
| | - Hua Li
- Institute of Analytical Science, North'west University, Xi'an 710069, China
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Ensafi AA, Karimi-Maleh H, Ghiaci M, Arshadi M. Characterization of Mn-nanoparticles decorated organo-functionalized SiO2–Al2O3 mixed-oxide as a novel electrochemical sensor: application for the voltammetric determination of captopril. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11909e] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Bahramipur H, Jalali F. Voltammetric Determination of Captopril Using Chlorpromazine as a Homogeneous Mediator. INTERNATIONAL JOURNAL OF ELECTROCHEMISTRY 2011. [DOI: 10.4061/2011/864358] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Chlorpromazine was used as a homogeneous electrocatalyst in the oxidation of captopril. The anodic peak current of chlorpromazine was increased substantially in the presence of low concentrations of captopril (pH 4). Cyclic voltammetry and chronoamperometry were used to study the kinetics of the catalytic electron transfer reaction. The values of electron transfer coefficient () and catalytic rate constant () were estimated to be 0.34 and , respectively. Linear sweep voltammetry was used for the determination of captopril in the presence of chlorpromazine. A linear calibration curve was obtained in the concentration range of captopril of 10.0–300.0 μM, with a limit of detection of 3.65 μM. The relative standard deviation (RSD%) for 5 replicate measurements of captopril (100 μM) was 1.96%. The method was applied to the determination of captopril in pharmaceutical formulations and blood serum samples with satisfactory results.
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Affiliation(s)
- Hossein Bahramipur
- Department of Chemistry, Razi University, Bagh Abrisham, Kermanshah 67149-67346, Iran
| | - Fahimeh Jalali
- Department of Chemistry, Razi University, Bagh Abrisham, Kermanshah 67149-67346, Iran
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El-Didamony AM, Erfan EAH. Utilization of oxidation reactions for the spectrophotometric determination of captopril using brominating agents. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 75:1138-1145. [PMID: 20080436 DOI: 10.1016/j.saa.2009.12.075] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2009] [Revised: 12/22/2009] [Accepted: 12/31/2009] [Indexed: 05/28/2023]
Abstract
Three simple, accurate and sensitive methods (A-C) for the spectrophotometric assay of captopril (CPL) in bulk drug, in dosage forms and in the presence of its oxidative degradates have been described. The methods are based on the bromination of captopril with a solution of excess brominating mixture in hydrochloric acid medium. After bromination, the excess brominating mixture is followed by the estimation of surplus bromine by three different reaction schemes. In the first method (A), the determination of the residual bromine is based on its ability to bleach the indigo carmine dye and measuring the absorbance at 610 nm. Method B, involves treating the unreacted bromine with a measured excess of iron(II) and the remaining iron(II) is complexed with 1,10-phenanthroline and the increase in absorbance is measured at 510 nm. In method (C), the surplus bromine is treated with excess of iron(II) and the resulting iron(III) is complexed with thiocyanate and the absorbance is measured at 478 nm. In all the methods, the amount of bromine reacted corresponds to the drug content. The different experimental parameters affecting the development and stability of the color are carefully studied and optimized. Beer's law is valid within a concentration range of 0.4-6.0, 0.4-2.8 and 1.2-4.8 microg mL(-1) for methods A, B and C, respectively. The calculated apparent molar absorptivity was found to be 5.16x10(4), 9.95x10(4) and 1.74x10(5)L mol(-1) cm(-1), for methods A, B and C, respectively. Sandell's sensitivity, correlation coefficients, detection and quantification limits are also reported. No interference was observed from common additives found in pharmaceutical preparations. The proposed methods are successfully applied to the determination of CPL in the tablet formulations with mean recoveries of 99.94-100.11% and the results were statistically compared with those of a reference method by applying Student's t- and F-test.
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Affiliation(s)
- Akram M El-Didamony
- Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt. ak
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Zhang G, Tang Y, Li H, Yu H, Sun S. Chemiluminescence of Potassium Permanganate–Glyoxal–Sulfur Contained Compound System. ANAL LETT 2009. [DOI: 10.1080/00032710802586921] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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25
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A 4-methylumbelliferone-based fluorescent probe for the sensitive detection of captopril. J Fluoresc 2008; 19:593-9. [PMID: 19050997 DOI: 10.1007/s10895-008-0449-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2008] [Accepted: 11/24/2008] [Indexed: 10/21/2022]
Abstract
A highly sensitive fluorogenic probe for captopril, 4-methylumbelliferyl-2, 4-dinitrobenzenesulfonate (4-MUDNBS), was designed and synthesized. 4-MUDNBS is a nonfluorescent compound and was synthesized via the one-step reaction of 4-methylumbelliferone (4-MU) with 2,4-dinitrobenzenesulfonyl chloride. Upon mixing with captopril in basic solution, the 2,4-dinitrobenzenesulfonyl group of 4-MUDNBS was efficiently removed and highly fluorescent 4-MU was released, hence leading to the dramatic fluorescence increase of the reaction solution. The fluorescence intensity is linear with captopril concentration in the range 3.0-500 ng mL(-1) with a detection limit of 2.2 ng mL(-1) (3sigma). The effect of substituents on the benzenesulfonyl moiety of the probe is discussed, and the presence of electronegative groups is favorable for the thiolate-induced cleavage reaction. The proposed method has been successfully applied to the captopril determination in pharmaceutical preparations.
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Gao L, Wu L, Li Q. Catalysis reaction between sodium 1,2-naphthoquinone-4-sulfonate and hydroxyl ion using captopril as catalyzer and determination of captopril. Anal Chim Acta 2008; 626:174-9. [PMID: 18790118 DOI: 10.1016/j.aca.2008.08.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2008] [Revised: 07/26/2008] [Accepted: 08/11/2008] [Indexed: 11/29/2022]
Abstract
A novel and simple spectrophotometric method for the determination of Captopril with sodium 1,2-naphthoquinone-4-sulfonate is established in this paper. The detailed reaction mechanism is proposed and discussed. It is based on the fact that captopril can catalyze the reaction between sodium 1,2-naphthoquinone-4-sulfonate and hydroxyl ion to form 2-hydroxy-1,4-naphthoquinone in buffer solution of pH 13.00. Beer's law is obeyed in a range of 0.64-80 mugmL(-1) at the maximal absorption wavelength of 442 nm. The equation of linear regression is A=0.05815+0.00589C (mugmL(-1)), with a linear regression correlation coefficient of 0.9981. The detection limit is 0.3 mugmL(-1), R.S.D. is 0.77% and the recovery rate is in range of 96.0-103.8%. Furthermore, the method has been validated and successfully applied to the determination of captopril in pharmaceutical samples.
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Affiliation(s)
- Linxiao Gao
- College of Chemistry and Environmental Science, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Xinxiang, Henan 453007, PR China
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Alnajjar AO. Simultaneous CE Determination of Captopril and Indapamide in Pharmaceuticals and Human Plasma. Chromatographia 2008. [DOI: 10.1365/s10337-008-0707-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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28
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Du M. Determination of Captopril in Human Plasma by Liquid Chromatography/Tandem Mass Spectrometry. ANAL LETT 2007. [DOI: 10.1080/00032710701672723] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Murillo Pulgarín JA, García Bermejo LF, Sánchez García MN. Multivariate calibration applied to the time-resolved chemilumnescence for the simultaneous determination of morphine and its antagonist naloxone. Anal Chim Acta 2007; 602:66-74. [DOI: 10.1016/j.aca.2007.09.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2007] [Revised: 09/07/2007] [Accepted: 09/12/2007] [Indexed: 11/16/2022]
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30
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Adcock JL, Francis PS, Barnett NW. Acidic potassium permanganate as a chemiluminescence reagent—A review. Anal Chim Acta 2007; 601:36-67. [PMID: 17904470 DOI: 10.1016/j.aca.2007.08.027] [Citation(s) in RCA: 151] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2007] [Revised: 08/20/2007] [Accepted: 08/20/2007] [Indexed: 11/21/2022]
Abstract
A critical and comprehensive review of acidic potassium permanganate chemiluminescence is presented. This includes discussion on reaction conditions, the influence of enhancers such as polyphosphates, formaldehyde and sulfite, the relationship between analyte structure and chemiluminescence intensity, and the application of this chemistry to determine a wide variety of compounds, such as pharmaceuticals, biomolecules, antioxidants, illicit drugs, pesticides and pollutants. Previous proposals for the nature of the emitting species are re-evaluated in light of recent evidence.
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Affiliation(s)
- Jacqui L Adcock
- School of Life and Environmental Sciences, Deakin University, Geelong, Victoria 3217, Australia
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Prior JAV, Santos JLM, Lima JLFC. Exploiting kinetic spectrophotometric determination of captopril, an angiotensin-converting enzyme inhibitor, in a multi-pumping flow system. Anal Chim Acta 2007; 600:183-7. [PMID: 17903482 DOI: 10.1016/j.aca.2007.01.080] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2006] [Revised: 01/18/2007] [Accepted: 01/23/2007] [Indexed: 10/23/2022]
Abstract
The implementation of a differential kinetic spectrophotometric method for the determination of angiotensin-converting-enzyme inhibitors in pharmaceutical formulations is described. The determination method was based on the monitoring (350 nm) of the reaction between captopril and iodate, in the presence of iodide, versus time and was fully automated by exploiting the multi-pumping flow concept. The developed multi-pumping flow system included four discretely actuated solenoid micro-pumps as unique flow manifold active components. The automatic control of the solenoid micro-pumps, under time-based and pulse-counting routines, allowed the implementation of a reliable and versatile analytical determination, with the additional advantage of permitting a runtime access to important analytical parameters, such as flow rate, sample insertion and reagent addition synchronisation, facilitating this way the establishment of an approach for kinetic measurements, directly due to the efficient solution handling and accurate timing control. A linear range of determination was verified for captopril concentrations between 10.0 and 60.0 microgmL(-1) with a sample throughput of about 100 determinations per hour. The results were in agreement with those obtained by the reference procedure with relative deviations between 1.81 and 4.48%.
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Affiliation(s)
- João A V Prior
- REQUIMTE, Serviço de Química-Física, Faculdade de Farmácia, Universidade do Porto, Rua Aníbal Cunha 164, 4099-030 Porto, Portugal
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Pérez-Ruiz T, Martínez-Lozano C, Galera R. Development and validation of a capillary electrophoresis method with laser-induced fluorescence detection for the determination of captopril in human urine and pharmaceutical preparations. Electrophoresis 2006; 27:2310-6. [PMID: 16718646 DOI: 10.1002/elps.200500861] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
This study describes the development of a CE method for the analysis of the antihypertensive drug captopril using LIF detection. The method is based on the derivatization of captopril with the fluorescent label 5-iodoacetamidofluorescein. The optimization of the electrophoretic electrolyte composition together with other variables, such as applied voltage and injection time, resulted in a solution of 20 mM phosphate buffer adjusted to pH 12.0. The calibration curve for the fluorescent captopril derivative was linear in the concentration range 3.5-6000 ng/mL with a detection limit of 0.5 ng/mL. Intra- and interday precision (at a concentration of about 100 times the LOD) were less than 0.86 and 1.16%, respectively, both expressed as RSD. The assay was successfully used for quantification of captopril in some marketed pharmaceutical preparations and urine samples.
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Affiliation(s)
- Tomás Pérez-Ruiz
- Department of Analytical Chemistry, Faculty of Chemistry, University of Murcia, Murcia, Spain.
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