1
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Box–Behnken Design-Based Optimized Kinetic Approach to Develop an Eco-friendly Analytical Method for the Quantitation of Glimepiride Using Spectrophotometry. J Pharm Innov 2022. [DOI: 10.1007/s12247-022-09691-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Blazheyevskiy M, Serdiukova Y, Karpova S. Development and Validation of a Simple Procedure for the Kinetic Spectrophotometric Quantitative Determination of Ceftriaxone Using Potassium Caroate. FRENCH-UKRAINIAN JOURNAL OF CHEMISTRY 2022. [DOI: 10.17721/fujcv10i1p1-12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
A simple procedure for the quantitative determination of the Ceftriaxone pure substance by the spectrophotometric method in its kinetic modification using Caro’s acid has been developed and validated. The scheme of the chemical transformation of Ceftriaxone with the reaction of potassium caroate has been proposed. The appearance of a new wave gives the possibility of developing a new procedure for the quantitative determination of Ceftriaxone. The obtained results of accuracy and precision are as follows: RSD = 1.63-2.25 %, δ = 0.33-0.96 %. LOD = 0.1 µg/mL, LOQ = 0.33 µg/mL.
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3
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Naser NA, Alasedi KM, Khan ZA. New Derivatization Methodology of 4-aminobenzoic Acid from its Dietary Supplements: Kinetic Spectrophotometric Methods for Determination. CURRENT NUTRITION & FOOD SCIENCE 2019. [DOI: 10.2174/1573401315666190719164931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:A new approach describing the validation and development of an easy, new spectrophotometric and kinetic method for identification of para-aminobenzoic acid in dietary supplement has been performed. In this study, para-aminobenzoic acid was derived in a pH-controlled environment, as a new organic compound 4(4-Benzophenylazo)pyrogallol, by incorporating diazotized para-aminobenzoic acid with pyrogallol.Objective:The determination of para-aminobenzoic acid was conducted by the fixed time and initial rate techniques. These approaches were based on the reaction of the compound containing paraaminobenzoic acid, 4(4-Benzophenylazo)pyrogallol, with Ag(I) to form colored product with a maximum absorbance at 468nm. Both of these techniques were adopted for constructing the calibration curves and examined for their suitability for the quantitation of para-aminobenzoic acid in dietary supplement.Methods:The determination process was established, using initial rate and fixed time kinetic spectrophotometric methods.Results:4(4-Benzophenylazo)pyrogallol was characterized using proton-nuclear magnetic resonance, Fourier-transform infrared, differential scanning calorimetry and thermogravimetric thermal methods, gas chromatography–mass techniques, and solvatochromic behavior in solvents with different polarities was also examined.Conclusion:For the first time, para-aminobenzoic acid was well determined by incorporating it as an organic solid compound, 4(4-Benzophenylazo)pyrogallol, through coupling pyrogallol with diazotized para-aminobenzoic acid in regulated pH medium, ranging between 5.0 to 6.0. The existence of common excipients in the dietary supplement did not produce any significant interference. F- and ttest data analysis were used for statistical comparison of the suggested techniques with that of reference method, demonstrating excellent agreement with no significant difference in the associated precision and accuracy.
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Affiliation(s)
- Naser A. Naser
- Department of Chemistry, Faculty of Science, University of Kufa, P.O. Box (21), Najaf Governorate, Iraq
| | - Kasim M. Alasedi
- ALSheik Al-tousi University College, An-najaf al-ashraf, P.O. Box (9), Iraq
| | - Zainab A. Khan
- Department of Chemistry, Faculty of Education for Girls, University of Kufa, P.O. Box (21), Najaf Governorate, Iraq
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Damirchi S, Maliheh AKK, Heidari T, Es'haghi Z, Chamsaz M. A comparison between digital camera and spectrophotometer for sensitive and selective kinetic determination of brilliant green in wastewaters. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 206:232-239. [PMID: 30119003 DOI: 10.1016/j.saa.2018.08.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 07/29/2018] [Accepted: 08/04/2018] [Indexed: 06/08/2023]
Abstract
In this study, a simple and novel kinetic spectrophotometric method has been proposed for the sensitive and highly selective determination of Brilliant Green. The method is based on the interaction of Brilliant Green with Triton X-100 in micellar media at room temperature. As a result of this interaction, the peak wavelength (625 nm) is gradually shifted toward longer wavelength region (634 nm) and more intensive hyper chromic effect has been seen. As well as, variations in the red, blue and green (RGB) components of the images as a function of time were observed. The kinetic interaction of Brilliant Green with Triton X-100 was recorded, using UV-Vis Spectrophotometer-diode array detector and a digital camera. The fixed-time method was used for the construction of a calibration curves. Brilliant Green can be measured in the range of 1.0 to 12.0 mg L-1 and 1.0 to 10.0 mg L-1with the detection limit of 0.047 mg L-1 and 0.037 mg L-1 using spectrophotometer and digital camera, respectively. The proposed method has been successfully used to determine Brilliant Green in some wastewaters such as textile dye effluent and goldfish farming water in the presence of some triphenylmethan dyes as the interferences.
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Affiliation(s)
- Saeed Damirchi
- Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran
| | | | - Tahereh Heidari
- Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran.
| | - Zarrin Es'haghi
- Department of Chemistry, Faculty of Sciences, Payame Noor University, PO Box 19395-3697, Tehran, Iran
| | - Mahmoud Chamsaz
- Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran
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Ashour S, Bayram R. Selective and validated kinetic spectrophotometric method for the determination of irbesartan in pure and pharmaceutical formulations. ANNALES PHARMACEUTIQUES FRANÇAISES 2018; 77:101-111. [PMID: 30471775 DOI: 10.1016/j.pharma.2018.09.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 09/05/2018] [Accepted: 09/06/2018] [Indexed: 11/26/2022]
Abstract
A novel-coupling reagent is used for the simple and sensitive kinetic spectrophotometric determination of irbesartan (IRB) in pure or pharmaceutical formulations. The method utilizes an oxidative coupling reaction based on oxidation of 3-methyl-2-benzothiazolinone hydrazone hydrochloride monohydrate (MBTH) with Ce(IV) in 2% sulfuric acid medium, followed by coupling the produced electrophilic intermediate (diazonium salt of the reagent) with IRB to give greenish-blue colored product (1:1, stoichiometry) having maximum absorption at 629nm and the colored species is stable for more than 1h. The initial rate and fixed time (at 35min) methods are adopted for determination of IRB concentration. The linearity is in the ranges of 5.0-40.0μg/mL and 2.0-45.0μg/mL and the limit of detection is 0.46 and 0.40μg/mL for initial rate and fixed time methods, respectively. Molar absorptivity for the method was found to be 1.50×104L/molcm. The validated kinetic methods can be successfully applied to the analysis of IRB in bulk and tablet dosage form and in the routine quality control analysis. The percentage recoveries were above 100% for both methods. The excipients did not interfere in the analysis.
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Affiliation(s)
- S Ashour
- Department of Chemistry, Faculty of Sciences, Aleppo University, Aleppo, Syria.
| | - R Bayram
- Departments of Pharmaceutical Chemistry, Pharmacy Program, Batterjee Medical College, Jeddah, Saudi Arabia
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6
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Naser NA, Alasedi KM, Khan ZA. New approach for determination of sulfadiazine in pharmaceutical preparations using 4(4-sulphophenylazo)pyrogallol: Kinetic spectrophotometric method. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 201:267-280. [PMID: 29758513 DOI: 10.1016/j.saa.2018.05.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 04/11/2018] [Accepted: 05/03/2018] [Indexed: 06/08/2023]
Abstract
A new trend describes the development and validation of a simple, sensitive and selective kinetic spectrophotometric methods for the determination of sulfadiazine in pharmaceutical formulations has been conducted. In this paper, sulfadiazine was derivatized as a new organic compound 4(4-sulphophenylazo) pyrogallol, 4-SPAP, by coupling pyrogallol with diazotized sulfadiazine in medium of controlled pH. 4-SPAP was characterized by techniques of FT-IR, H-NMR, GC-Mass, TG and DSC thermal analysis methods. Solvatochromic behavior in solvents of various polarities was also investigated. The determination of sulfadiazine was accomplished by initial rate and fixed time methods. These methods were based on the reaction of the compound containing sulfadiazine, 4-SPAP, with Ca(II) to form colored product with a maximum absorbance at 520 nm. The two methods were adopted for constructing the calibration curves and examined for their suitability for the quantitation of sulfadiazine in pharmaceuticals. The limit of detection (LOD) and limit of quantification (LOQ) were found to be, by initial rate method, 0.35 and 1.05 μg·mL-1and that by fixed time method were found to be 0.69 and 2.07 μg·mL-1, respectively. The percent relative standard deviations (%RSD) for the results ranged from 1.04% to 1.76% and 0.85% to 1.42% for the initial rate and fixed time methods of the proposed kinetic spectrophotometric method, respectively. The existence of common excipients in the pharmaceutical formulation did not produce any significant interference. Statistical comparison was reported as indicated from the F- and t-test data of the proposed methods with that of reference method showing excellent agreement and indicating no significant difference in their accuracy and precision.
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Affiliation(s)
- Naser A Naser
- Department of Chemistry, Faculty of Science, University of Kufa, P.O. Box(21), Najaf Governorate, Iraq.
| | - Kasim M Alasedi
- AL-Sheik al-tousi, University College, An-najaf al-ashraf, P.O. Box(9), Iraq.
| | - Zainab A Khan
- Department of Chemistry, Faculty of Education for Girls, University of Kufa, P.O. Box(21), Najaf Governorate, Iraq.
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7
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Lajevardi A, Hossaini Sadr M, Tavakkoli Yaraki M, Badiei A, Armaghan M. A pH-responsive and magnetic Fe3O4@silica@MIL-100(Fe)/β-CD nanocomposite as a drug nanocarrier: loading and release study of cephalexin. NEW J CHEM 2018. [DOI: 10.1039/c8nj01375f] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the present work, a novel magnetic and pH-responsive porous nanocomposite was prepared by the surface grafting of β-cyclodextrin onto Fe3O4@silica@MIL-100(Fe).
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Affiliation(s)
- Aseman Lajevardi
- Department of Chemistry
- Islamic Azad University
- Science and Research Branch
- Tehran
- Iran
| | - Moayad Hossaini Sadr
- Department of Chemistry
- Faculty of Science
- Azarbaijan Shahid Madani University
- Tabriz
- Iran
| | - Mohammad Tavakkoli Yaraki
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore 117585
- Singapore
- Institute of Materials Research and Engineering
| | - Alireaza Badiei
- School of Chemistry
- College of Science
- University of Tehran
- Tehran
- Iran
| | - Mahsa Armaghan
- Department of Chemistry
- Islamic Azad University
- Science and Research Branch
- Tehran
- Iran
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8
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Siddiqui MR, AlOthman ZA, Rahman N. Analytical techniques in pharmaceutical analysis: A review. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2013.04.016] [Citation(s) in RCA: 352] [Impact Index Per Article: 50.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
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9
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Zheng X, Bi C, Li Z, Podariu M, Hage DS. Analytical methods for kinetic studies of biological interactions: A review. J Pharm Biomed Anal 2015; 113:163-80. [PMID: 25700721 PMCID: PMC4516701 DOI: 10.1016/j.jpba.2015.01.042] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Revised: 01/16/2015] [Accepted: 01/19/2015] [Indexed: 01/13/2023]
Abstract
The rates at which biological interactions occur can provide important information concerning the mechanism and behavior of these processes in living systems. This review discusses several analytical methods that can be used to examine the kinetics of biological interactions. These techniques include common or traditional methods such as stopped-flow analysis and surface plasmon resonance spectroscopy, as well as alternative methods based on affinity chromatography and capillary electrophoresis. The general principles and theory behind these approaches are examined, and it is shown how each technique can be utilized to provide information on the kinetics of biological interactions. Examples of applications are also given for each method. In addition, a discussion is provided on the relative advantages or potential limitations of each technique regarding its use in kinetic studies.
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Affiliation(s)
- Xiwei Zheng
- Department of Chemistry, University of Nebraska, Lincoln, NE 68588, USA
| | - Cong Bi
- Department of Chemistry, University of Nebraska, Lincoln, NE 68588, USA
| | - Zhao Li
- Department of Chemistry, University of Nebraska, Lincoln, NE 68588, USA
| | - Maria Podariu
- Department of Chemistry, University of Nebraska, Lincoln, NE 68588, USA
| | - David S Hage
- Department of Chemistry, University of Nebraska, Lincoln, NE 68588, USA.
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10
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Rahman N, Khan S. Kinetic modelling for the assay of nortriptyline hydrochloride using potassium permanganate as oxidant. AAPS PharmSciTech 2015; 16:569-78. [PMID: 25380790 DOI: 10.1208/s12249-014-0230-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Accepted: 09/25/2014] [Indexed: 11/30/2022] Open
Abstract
Kinetic methods for accurate determination of nortriptyline hydrochloride have been described. The methods are based on the oxidation of nortriptyline hydrochloride with KMnO4 in acidic and basic media. In acidic medium, the decrease in absorbance at 525.5 nm and in basic medium, the increase in absorbance at 608.5 nm were measured as a function of time. The variables affecting the reactions were carefully investigated and optimised. Kinetic models such as initial rate, rate constant, variable time and fixed time were employed to construct the calibration curves. The initial rate and fixed time methods were selected for quantification of nortriptyline hydrochloride. In acidic medium, the calibration curves showed a linear response over the concentration range 10-50 μg mL(-1) for initial rate and 10-60 μg mL(-1) for fixed time method (2 min). In basic medium, the calibration graphs were linear over the concentration range 10-100 μg mL(-1) for initial rate and fixed time methods (4 min). In acidic medium, the limits of detection for initial rate and fixed time methods (2 min) were 1.02 and 3.26 μg mL(-1), respectively. In basic medium, the limits of detection were found to be 1.67 and 1.55 μg mL(-1) for initial rate and fixed time methods (4 min), respectively. The initial rate and fixed time methods have been successfully applied to the determination of nortriptyline hydrochloride in commercial dosage form. Statistical comparison of the results of the proposed methods with those of reference method exhibited excellent agreement and there is no significant difference between the compared methods in terms of accuracy and precision.
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11
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Ashour S, Bayram R. Development and validation of sensitive kinetic spectrophotometric method for the determination of moxifloxacin antibiotic in pure and commercial tablets. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 140:216-222. [PMID: 25596545 DOI: 10.1016/j.saa.2014.12.111] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2014] [Revised: 12/22/2014] [Accepted: 12/23/2014] [Indexed: 06/04/2023]
Abstract
New, accurate, sensitive and reliable kinetic spectrophotometric method for the assay of moxifloxacin hydrochloride (MOXF) in pure form and pharmaceutical formulations has been developed. The method involves the oxidative coupling reaction of MOXF with 3-methyl-2-benzothiazolinone hydrazone hydrochloride monohydrate (MBTH) in the presence of Ce(IV) in an acidic medium to form colored product with lambda max at 623 and 660 nm. The reaction is followed spectrophotometrically by measuring the increase in absorbance at 623 nm as a function of time. The initial rate and fixed time methods were adopted for constructing the calibration curves. The linearity range was found to be 1.89-40.0 μg mL(-1) for initial rate and fixed time methods. The limit of detection for initial rate and fixed time methods is 0.644 and 0.043 μg mL(-1), respectively. Molar absorptivity for the method was found to be 0.89×10(4) L mol(-1) cm(-1). Statistical treatment of the experimental results indicates that the methods are precise and accurate. The proposed method has been applied successfully for the estimation of moxifloxacin hydrochloride in tablet dosage form with no interference from the excipients. The results are compared with the official method.
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Affiliation(s)
- Safwan Ashour
- Department of Chemistry, Faculty of Sciences, University of Aleppo, Aleppo, Syria.
| | - Roula Bayram
- Department of Pharmaceutical Chemistry, Pharmacy Program, Batterjee Medical College, Jeddah, Saudi Arabia
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12
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Ashour S, Khateeb M. Kinetic spectrophotometric determination of pravastatin in drug formulations via derivatization with 4-chloro-7-nitrobenzo-2-oxa-1,3-diazole (NBD-Cl). ARAB J CHEM 2011. [DOI: 10.1016/j.arabjc.2010.06.050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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13
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Ni Y, Chen J, Kokot S. Investigation of the pharmacokinetics and determination of certain cephalosporins in rabbit plasma by a kinetic spectrophotometric method with the aid of chemometrics. Sci China Chem 2011. [DOI: 10.1007/s11426-010-4125-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Mitić SS, Miletić G, Rašić ID, Pavlović AN. Kinetic quantification of sodium salicylate in human serum and wine. JOURNAL OF ANALYTICAL CHEMISTRY 2011. [DOI: 10.1134/s1061934811010096] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Adcock JL, Barrow CJ, Barnett NW, Conlan XA, Hogan CF, Francis PS. Chemiluminescence and electrochemiluminescence detection of controlled drugs. Drug Test Anal 2010; 3:145-60. [PMID: 21154734 DOI: 10.1002/dta.236] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2010] [Revised: 10/22/2010] [Accepted: 10/23/2010] [Indexed: 11/10/2022]
Abstract
We review the determination of various controlled drugs (opioids, tranquilizers, stimulants, and hallucinogens) using flow-analysis methodologies (flow injection analysis, high performance liquid chromatography, capillary electrophoresis, and microfluidic devices) with chemiluminescence and electrochemiluminescence reagents such as luminol, diaryloxalates, tris(2,2'-bipyridine)ruthenium(II), permanganate, manganese(IV), and sulfite, for industrial, clinical, pharmaceutical, and forensic science applications.
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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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Saleh GA, El-Shaboury SR, Mohamed FA, Rageh AH. Kinetic spectrophotometric determination of certain cephalosporins using oxidized quercetin reagent. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 73:946-954. [PMID: 19482508 DOI: 10.1016/j.saa.2009.05.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2008] [Revised: 04/30/2009] [Accepted: 05/02/2009] [Indexed: 05/27/2023]
Abstract
A simple, precise and accurate kinetic spectrophotometric method for determination of cefoperazone sodium, cefazolin sodium and ceftriaxone sodium in bulk and in pharmaceutical formulations has been developed. The method is based upon a kinetic investigation of the reaction of the drug with oxidized quercetin reagent at room temperature for a fixed time of 30 min. The decrease in absorbance after the addition of the drug was measured at 510 nm. The absorbance concentration plot was rectilinear over the range 80-400 microg mL(-1) for all studied drugs. The concentration of the studied drugs was calculated using the corresponding calibration equation for the fixed time method. The determination of the studied drugs by initial rate, variable time and rate-constant methods was feasible with the calibration equations obtained but the fixed time method has been found to be more applicable. The analytical performance of the method, in terms of accuracy and precision, was statistically validated; the results were satisfactory. The method has been successfully applied to the determination of the studied drugs in commercial pharmaceutical formulations. Statistical comparison of the results with a well established reported method showed excellent agreement and proved that there is no significant difference in the accuracy and precision.
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Affiliation(s)
- Gamal A Saleh
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, 71526 Assiut, Egypt
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Kurzawa J, Wiśniewska A, Janowicz K. Stopped-flow determination of 2-mercaptopyrimidines as inductors of the iodine-azide reaction. Anal Chim Acta 2006. [DOI: 10.1016/j.aca.2006.03.049] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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18
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Mitic SS, Sunaric SM, Tosic SB. Determination of Streptomycin in a Pharmaceutical Sample Based on Its Degradation by Hydrogen Peroxide in the Presence of Copper(II). ANAL SCI 2006; 22:753-6. [PMID: 16770057 DOI: 10.2116/analsci.22.753] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The kinetics of streptomycin degradation by hydrogen peroxide at pH 7.4 was investigated. The reaction was catalyzed by traces of Cu(II) ions, and it was followed spectrophotometrically at 322 nm by applying the initial-rate method. The kinetic parameters of the reaction are reported, and a rate equation is suggested. From the dependence of the relative rate constants on the temperature, the activation energy was calculated to be 57.5 kJ/mol. Based on this reaction, a kinetic method for streptomycin determination is proposed. The calibration graph is linear in the ranges 1.94 - 15.48 microg/cm(3) and 0.15 - 1.94 microg/cm(3). The influence of foreign ions and molecules on the accuracy of the determinations was investigated. The proposed kinetic method has high selectivity and good sensitivity, and enabled to determine streptomycin in pharmaceutical samples.
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Affiliation(s)
- Snezana S Mitic
- Faculty of Natural Sciences and Mathematics, Department of Chemistry, University of Nis, Serbia and Montenegro
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Rahman N, Siddiqui MR, Azmi SNH. Quantitative Analysis of Irbesartan in Commercial Dosage Forms by Kinetic Spectrophotometry. Chem Pharm Bull (Tokyo) 2006; 54:626-31. [PMID: 16651756 DOI: 10.1248/cpb.54.626] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The objective of this work is to develop a new kinetic spectrophotometric method for the determination of irbesartan in pharmaceutical formulations. The method is based on the reaction of carboxylic acid group of the oxidized irbesartan with a mixture of potassium iodate (KIO(3)) and iodide (KI) to form yellow colored triiodide ions in aqueous medium at 30+/-1 degrees C. The reaction is followed spectrophotometrically by measuring the rate of change of absorbance at 352 nm. The initial-rate and fixed-time (DeltaA) methods are adopted for constructing the calibration curves, which were found to be linear over the concentration ranges of 10.0-60.0 and 7.5-60.0 microg ml(-1) respectively. The regression analysis of calibration data yielded the linear equations: rate=-2.138 x 10(-6)+1.058 x 10(-4)C and DeltaA=-3.75 x 10(-3)+3.25 x 10(-3)C for initial rate and fixed time (DeltaA) methods, respectively. The limit of detection for initial rate and fixed time methods are 0.21 and 2.40 mug ml(-1), respectively. The various activation parameters such as E(a), DeltaH++, DeltaS++ and DeltaG++ are also calculated for the reaction and found to be 70.95+/-0.43 kJ mol(-1), 68.48+/-0.21 kJ mol(-1), 16.54+/-0.24 J K(-1) mol(-1) and -4.94+/-0.07 kJ mol(-1), respectively. The proposed methods are optimized and validated as per the guidelines of International Conference on Harmonisation (U.S.A.). The point and interval hypothesis tests have been performed which indicate that there is no significant difference between the proposed methods and the reference method. The methods have been successfully applied to the determination of irbesartan in commercial dosage forms.
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Affiliation(s)
- Nafisur Rahman
- Department of Chemistry, Aligarh Muslim University, Aligarh-202002, Uttar Pradesh, India.
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Ruedas Rama MJ, Ruiz Medina A, Molina Díaz A. Bead injection spectroscopy-flow injection analysis (BIS-FIA): an interesting tool applicable to pharmaceutical analysis. J Pharm Biomed Anal 2004; 35:1027-34. [PMID: 15336350 DOI: 10.1016/j.jpba.2004.03.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2003] [Revised: 03/04/2004] [Accepted: 03/19/2004] [Indexed: 10/26/2022]
Abstract
A bead injection spectroscopy-flow injection analysis (BIS-FIA) system for the spectrophotometric detection of promethazine and trifluoperazine is developed. The sensor is based in the oxidation of the phenothiazines by Fe(III) which is later determined by formation of the complex between Fe(II) and Ferrozine, [FeFz(3)](4-). Immediately, this complex is retained on a homogeneous bead suspension of Sephadex QAE A-25 resin (500 microl) which has been injected previously in the system to fill a commercial flow-cell (Hellma 138-OS). The use of BI with respect to the use of a reusable flow-through sensor is justified because the complex is so strongly retained on the beads that the regeneration of the solid support becomes extraordinarily difficult in the proposed method. At the end of the analysis, beads are automatically discarded from the flow-cell, by reversing the flow, and transported out of the system. The analytical signals are measured at a wavelength of 567 nm, corresponding to the absorbance of the complex. Using a sample volume of 600 microl, the analytical signal showed a very good linearity in the range 0.5-8.0 microgml(-1) and 0.5-10.0 microgml(-1), with detection limits of 0.09 and 0.14 microgml(-1) for promethazine and trifluoperazine, respectively. R.S.D.s (%) lower than 2% were obtained for both analytes. The proposed method is highly selective in the presence of other species that are normally encountered with these analytes. The sensor was satisfactorily applied to pharmaceutical preparations.
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Affiliation(s)
- M J Ruedas Rama
- Department of Physical and Analytical Chemistry, Faculty of Experimental Sciences, University of Jaén, 23071 Jaén, Spain
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Helaleh MI, Korenaga T, Abu-Nameh ES, Jamhour RM. Assay of paracetamol by oxidation with peroxydisulphate. ACTA ACUST UNITED AC 1999. [DOI: 10.1016/s0031-6865(98)00032-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Soper SA, Warner IM, McGown LB. Molecular Fluorescence, Phosphorescence, and Chemiluminescence Spectrometry. Anal Chem 1998. [DOI: 10.1021/a1980019y] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Steven A. Soper
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, and Department of Chemistry, Duke University, Box 90346, Durham, North Carolina 27708-0346
| | - Isiah M. Warner
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, and Department of Chemistry, Duke University, Box 90346, Durham, North Carolina 27708-0346
| | - Linda B. McGown
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, and Department of Chemistry, Duke University, Box 90346, Durham, North Carolina 27708-0346
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Crouch SR, Cullen TF, Scheeline A, Kirkor ES. Kinetic Determinations and Some Kinetic Aspects of Analytical Chemistry. Anal Chem 1998. [DOI: 10.1021/a1980005s] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Zuber E, Mathis G, Flandrois JP. Homogeneous two-site immunometric assay kinetics as a theoretical tool for data analysis. Anal Biochem 1997; 251:79-88. [PMID: 9300086 DOI: 10.1006/abio.1997.2243] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The easily accessible kinetics of a new homogeneous two-site fluorometric immunoassay for prolactin was studied, in order to determine its usefulness for assay data reduction and optimization. The combined use of a simple descriptive model fitted to experimental data and a mechanistic model to simulate the kinetics revealed that (i) the kinetics curve presented an early inflexion point. Its time of occurrence was constant as long as the antigen concentration was below the smallest antibody concentration and decreased to zero for higher concentrations. It may therefore be used as an indicator of hooked samples. (ii) The kinetics steepest slope was correlated with antigen concentration. Its use as a dose-response curve variable would allow higher concentrations to be assayed than with the classical end-point dose-response curve. The results suggest that control and exploitation of kinetic parameters could help to improve the rapidity, analytical range, and reliability of homogeneous two-site immunometric assays.
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Affiliation(s)
- E Zuber
- Laboratoire de bactériologie, CNRS UMR 5558, Faculté de médecine Lyon Sud, Oullins, France.
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