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Al-Shwaiyat M, Vishnikin A, Kharadzha A, Bazel Y. A non-extraction sequential injection method for determination of loratadine using formation of its ion-association complex with bromocresol purple in acetonitrile. Talanta 2024; 272:125844. [PMID: 38442495 DOI: 10.1016/j.talanta.2024.125844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 02/25/2024] [Accepted: 02/27/2024] [Indexed: 03/07/2024]
Abstract
The formation of an ion-association complex (IA) between sulfonephthalein dye and basic nitrogen-containing compound in an organic solvent medium has been for the first time used to develop an automated SIA method. In highly polar aprotic solvents, the tautomeric equilibrium for such dyes is strongly shifted towards the colorless lactonic form. The addition of a basic nitrogen-containing substance leads to the formation of IA with a highly colored quinonoid form, which is accompanied by an increase in the absorbance of the dye band at approximately 400 nm. Protonation of pyridine nitrogen in loratadine, structure and binding places of IA were shown using quantum-chemical calculations. The very simple, direct and non-extraction spectrophotometric SIA method with high throughput of 43 h-1 was developed based on the formation of IA between loratadine and bromocresol purple in the medium of acetonitrile used both as solvent and carrier. The calibration graph was linear in the concentration range from 1.0 to 20 mg L-1 with correlation coefficient of 0.9992. The developed method was successfully applied to the analysis of pharmaceutical formulations.
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Affiliation(s)
- Mohammed Al-Shwaiyat
- Department of Basic and Applied Science, Zarka University College, Al-Balqa Applied University, 19117, Al-Salt, Jordan
| | - Andriy Vishnikin
- Department of Analytical Chemistry, Institute of Chemistry, Faculty of Science, Pavol Jozef Šafárik University in Košice, Moyzesova 11, 040 01, Košice, Slovak Republic; Department of Analytical Chemistry, Faculty of Chemistry, Oles Honchar Dnipro National University, Gagarin Av. 72, 49010, Dnipro, Ukraine.
| | - Anastasii Kharadzha
- Department of Analytical Chemistry, Institute of Chemistry, Faculty of Science, Pavol Jozef Šafárik University in Košice, Moyzesova 11, 040 01, Košice, Slovak Republic
| | - Yaroslav Bazel
- Department of Analytical Chemistry, Institute of Chemistry, Faculty of Science, Pavol Jozef Šafárik University in Košice, Moyzesova 11, 040 01, Košice, Slovak Republic
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2
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Li X, Zheng D, Wu J, Jin Z, Svensson B, Bai Y. Increasing γ-CD conversion rates by improving thermostability of Bacillus sp. FJAT-44876 γ-CGTase. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.102204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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3
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Abdelazim AH, Ramzy S. Spectrophotometric quantitative analysis of lesinurad using extractive acid dye reaction based on greener selective computational approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 277:121292. [PMID: 35486984 DOI: 10.1016/j.saa.2022.121292] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 04/07/2022] [Accepted: 04/19/2022] [Indexed: 06/14/2023]
Abstract
Computational studies introduce an integral approach for finding greener methods through testing solvents for reactions and extractions. Lesinurad is a novel selective uric acid reabsorption inhibitor prescribed for the treatment of chronic gout. Computational calculations were achieved to choose the best acid dye used for sensitive visible spectrophotometric determination of lesinurad. The calculations were performed using Gaussian 03 software based on density functional theory method with B3LYP/6-31G(d) basis set. The obtained results revealed that bromophenol blue was preferred for lesinurad than other acid dyes based on the higher calculated interaction energy. The described method was based on the reaction of lesinurad with the theoretically selected acid dye bromophenol blue to form a yellow ion-pair complex. The absorption spectra showed maximum sharp peaks at 418 nm. Different factors affecting the reaction were optimized. Beer's law was demonstrated over the concentration range of 2-12 μg/mL lesinurad. The described reaction was utilized for the spectrophotometric determination of lesinurad in pure form and in the pharmaceutical preparation. The greenness of the described method was assessed using four different tools namely, the national environmental method index, the analytical eco-scale, the green analytical procedure index and the novel analytical greenness metric. The proposed method seemed to be superior to the reported HPLC method with respect to the metrics of the greenness characters.
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Affiliation(s)
- Ahmed H Abdelazim
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt.
| | - Sherif Ramzy
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt
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Abdelazim AH, Ramzy S. Spectrophotometric quantitative analysis of remdesivir using acid dye reagent selected by computational calculations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 276:121188. [PMID: 35395463 PMCID: PMC9761279 DOI: 10.1016/j.saa.2022.121188] [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: 01/20/2022] [Revised: 03/16/2022] [Accepted: 03/22/2022] [Indexed: 06/01/2023]
Abstract
Remdesivir was approved by the Food and Drug Administration for the treatment of COVID -19 in hospitalized adult and pediatric patients. Application of computational calculations for choosing the sensitive reagent in spectrophotometric quantitative analysis is very limited. Computational and theoretical studies were used for choosing the best acid dye for selective visible spectrophotometric quantitative analysis of remdesivir. The calculations were performed using Gaussian 03 software with the density functional theory method using B3LYP/6-31G(d) basis set. The theoretical studies revealed that bromophenol blue is a better match for remdesivir than other acid dyes due to the higher calculated interaction energy. The proposed method was based on the reaction of remdesivir with the computationally selected acid dye bromophenol blue to form a yellow ion-pair complex. The spectra showed absorption peaks at 418 nm. Various factors affecting the reaction were optimized. The method was successfully applied for the determination of remdesivir in the pharmaceutical preparation with good accuracy and precision. Beer's law was observed in the concentration range of 2-12 μg/mL of remdesivir. The proposed reaction was used as a basis for the spectrophotometric determination of remdesivir in pure form and in the pharmaceutical preparation.
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Affiliation(s)
- Ahmed H Abdelazim
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, 11751 Nasr City, Cairo, Egypt.
| | - Sherif Ramzy
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, 11751 Nasr City, Cairo, Egypt
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Shapovalov SA. Bromocresol purple in the processes of cation-anionic interactions in aqueous solutions: UV-Vis spectroscopy and computer simulation of dissimilar association. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 269:120741. [PMID: 34929629 DOI: 10.1016/j.saa.2021.120741] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 11/24/2021] [Accepted: 12/08/2021] [Indexed: 06/14/2023]
Abstract
The formation of associates between single- or double-charged anions of bromocresol purple (3,3'-dimethyl-5,5'-dibromophenolsulfonephthalein) and single-charged cations of cyanines (quinaldine blue, quinaldine red) has been investigated. The equilibrium constants of the association have been determined on the basis of UV-Vis spectroscopy data. The energy of the cation-anion interaction (the standard enthalpy of formation of ions and associates), as well as the probable structure of associates, were established using the PM7 semiempirical method. The presented results can be useful in the development of new spectroscopic methods for the detection of organic additives in water (e.g. acetone) due to the spectral properties of dissimilar associates.
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Affiliation(s)
- Serghey A Shapovalov
- Research Institute of Chemistry, V. N. Karazin Kharkiv National University, Svobody sq. 4, Kharkiv 61022, Ukraine.
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Abdel-Kader DA, Hashem EY. Spectrophotometric determination of Metronidazole antibacterial drug via oxidation with alkaline potassium permanganate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 259:119858. [PMID: 33975173 DOI: 10.1016/j.saa.2021.119858] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 04/13/2021] [Accepted: 04/15/2021] [Indexed: 06/12/2023]
Abstract
Highly simple, sensitive and selective method is developed for the spectrophotometric determination of Metronidazole (MDZ) antibacterial drug either in pure form or in pharmaceutical formulations. This method is based on reduction of potassium permanganate by Metronidazole drug in sodium hydroxide solution to give green manganate ion which recorded at 610 nm. The method produced linear responses in the concentration range 4.28 - 59.91 µg mL-1 with limit of detection (LOD) and limit of quantification (LOQ) 0.21 and 0.69 µg mL-1 for Metronidazole drug respectively. The apparent molar absorptivity is 0.865 × 104 L mol-1 cm-1, Sandell sensitivity is 0.019 µg cm-2 and correlation coefficient is 0.951. The method is highly reproducible and has been applied to a wide variety of pharmaceutical formulations and the results compare favourably with those of official methods.
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Affiliation(s)
- Doaa A Abdel-Kader
- Department of Chemistry, Faculty of Science, Assiut University, 71516 Assiut, Egypt.
| | - Elham Y Hashem
- Department of Chemistry, Faculty of Science, Assiut University, 71516 Assiut, Egypt
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Synthesis of novel keto-bromothymol blue in different media using oxidation–reduction reactions: combined experimental and DFT-TDDFT computational studies. CHEMICAL PAPERS 2021. [DOI: 10.1007/s11696-021-01540-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Mohamed SH, Magdy AI, Ahmed AA. Exploring the nature of the clopidogrel–bromocresol green interactionviaspectrophotometric measurements and quantum chemical calculations. RSC Adv 2018; 8:29104-29114. [PMID: 35547975 PMCID: PMC9084451 DOI: 10.1039/c8ra05187a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Accepted: 08/08/2018] [Indexed: 11/23/2022] Open
Abstract
Clopidogrel is an oral, thienopyridine class antiplatelet agent used to inhibit blood clots in coronary arteries, peripheral vascular and cerebrovascular diseases. A spectrophotometric method was developed for clopidogrel bisulfate (CLOP·H2SO4) determination using bromocresol green (BCG) as an ion-pairing agent. To explore the binding nature of CLOP·H2SO4 with BCG at a molecular level, quantum chemical calculations have been performed. DFT based full geometry optimization has been carried out for BCG and clopidogrel in basic (CLOP) and protonated (CLOP+) forms as well as for BCG ion-pairs with CLOP and CLOP·H2SO4. The DFT calculations referred to the stability of the BCG–CLOP+ ion-pair and its spontaneous formation reaction from BCG and CLOP·H2SO4 compared to the BCG–CLOP-ion-pair. Furthermore, the UV-visible spectra and their corresponding excited states and electronic transitions for BCG, BCG–CLOP+ ion-pair, and BCG–CLOP ion-pair have been investigated. These spectra provided a molecular level understanding of the nature of the different intra-molecular and intermolecular electronic transitions in the BCG ion-pairs with CLOP+. Moreover, the quantitative analysis based on extracting a yellow-formed ion-pair into chloroform from aqueous medium was carried out. The ion-pair exhibits an absorption maximum at 413 nm. The optimum conditions of the reactions were studied experimentally and optimized. The calibration graph shows that CLOP·H2SO4 can be determined up to 100.0 μg mL−1 with detection limit (LOD) of 0.57 μg mL−1 and quantification limit (LOQ) of 1.86 μg mL−1. The low relative standard deviation values, 0.16–1.16, indicate good precision. The results were compared to other published data and were treated statistically using F and t-tests. The nature of the different electronic transitions of clopidogrel bisulfate; antiplatelet agent, in BCG ion-pair and quantitative analysis based on extracting a yellow-formed ion-pair into chloroform from aqueous medium is obtained.![]()
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Affiliation(s)
| | - Alyaa I. Magdy
- Chemistry Department
- Faculty of Engineering
- Madina High Institute for Engineering and Technology
- Giza
- Egypt
| | - Ashour A. Ahmed
- Institute of Physics
- University of Rostock
- D-18059 Rostock
- Germany
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9
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Ansari F, Ghaedi M, Taghdiri M, Asfaram A. Application of ZnO nanorods loaded on activated carbon for ultrasonic assisted dyes removal: Experimental design and derivative spectrophotometry method. ULTRASONICS SONOCHEMISTRY 2016; 33:197-209. [PMID: 27245971 DOI: 10.1016/j.ultsonch.2016.05.004] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Revised: 05/04/2016] [Accepted: 05/05/2016] [Indexed: 05/15/2023]
Abstract
A method based on application of ZnO nanorods loaded on activated carbon (ZnO-NRs-AC) for adsorption of Bromocresol Green (BCG) and Eosin Y (EY) accelerated by ultrasound was described. The present material was synthesized under ultrasound assisted wet-chemical method and subsequently was characterized by FE-SEM, TEM, BET and XRD analysis. The extent of contribution of conventional variables like pH (2.0-10.0), BCG concentration (4-20mgL(-1)), EY concentration (3-23mgL(-1)), adsorbent dosage (0.01-0.03g), sonication time (1-5min) and centrifuge time (2-6min) as main and interaction part were investigated by central composite design under response surface methodology. Analysis of variance (ANOVA) was adapted to experimental data and guide the best operational conditions mass by set at 6.0, 9mgL(-1), 10mgL(-1), 0.02g, 4 and 4min for pH, BCG concentration, EY concentration, adsorbent dosage, sonication and centrifuge time, respectively. At these specified conditions dye adsorption efficiency was higher than 99.5%. The suitability and well prediction of optimum point was tested by conducting five experiments and respective results revel that RSD% was lower than 3% and high quality of fitting was confirmed by t-test. The experimental data were best fitted in Langmuir isotherm equation and the removal followed pseudo second order kinetics. The experimentally obtained maximum adsorption capacities were estimated as 57.80 and 61.73mgg(-1) of ZnO-NRs-AC for BCG and EY respectively from binary dye solutions. The mechanism of removal was explained by boundary layer diffusion via intraparticle diffusion.
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Affiliation(s)
- Fatemeh Ansari
- Department of Chemistry, Payame Noor University, 19395-3697 Tehran, Iran
| | - Mehrorang Ghaedi
- Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran.
| | - Mehdi Taghdiri
- Department of Chemistry, Payame Noor University, 19395-3697 Tehran, Iran
| | - Arash Asfaram
- Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran
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10
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Spectrophotometric determination of nifedipine in pharmaceutical formulations, serum and urine samples via oxidative coupling reaction. ARAB J CHEM 2016. [DOI: 10.1016/j.arabjc.2012.04.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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11
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Advanced Spectrophotometric Analysis of Sunset Yellow Dye E110 in Commercial Food Samples. FOOD ANAL METHOD 2016. [DOI: 10.1007/s12161-016-0630-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Saleh MMS, Hashem EY, Salahi NOAA. Oxidation and Complexation-Based Spectrophotometric Methods for Sensitive Determination of Tartrazine E102 in Some Commercial Food Samples. ACTA ACUST UNITED AC 2016. [DOI: 10.4236/cc.2016.42005] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Zeng Q, Wei T, Wang M, Huang X, Fang Y, Wang L. Polyfurfural film modified glassy carbon electrode for highly sensitive nifedipine determination. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.10.141] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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14
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ELMOSALLAMY MAF, AMIN AS. New Potentiometric and Spectrophotometric Methods for the Determination of Dextromethorphan in Pharmaceutical Preparations. ANAL SCI 2014; 30:419-25. [DOI: 10.2116/analsci.30.419] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Mohamed A. F. ELMOSALLAMY
- Chemistry Department, Faculty of Science, Zagazig University
- Chemistry Department, College of Science and Humanity Studies
| | - Alaa S. AMIN
- Chemistry Department, Faculty of Science, Benha University
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Devagondanahalli MH, Shaikh SMT, Jaldappagari S, Ramanaboyina SK, Kasalanti H. Determination of Cinnarizine in Pure and Pharmaceutical Formulations. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200700011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Aderibigbe SA, Adegoke OA, Idowu OS. A new colorimetric method for the determination of nifedipine tablets by derivatization using 4-carboxyl-2,6-dinitrobenzene diazonium ion. INTERNATIONAL JOURNAL OF INDUSTRIAL CHEMISTRY 2012. [DOI: 10.1186/2228-5547-3-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Abstract
Background
A new sensitive colorimetric determination of nifedipine has been developed following azo dye formation with 4-carboxyl-2,6-dinitrobenzenediazonium ion (CDNBD). Judging from the various generic brands currently now available, this research was conceived as a means of developing an alternative cost-effective and readily adaptable method for the assay of nifedipine in tablets and for which official high performance liquid chromatographic technique may not be readily available.
Results
Nifedipine was reduced with Zn/HCl reduction system and then the diazo coupling reaction was carried out with the CDNBD reagent to generate a new azo adduct with optimal wavelength at 470 nm representing a bathochromic shift relative to nifedipine, reduced nifedipine and CDNBD reagent. Optimal temperature and time for coupling were selected as 50 oC and 15 minutes. A linear response was observed over 2.9 -14.5 µg/mL of nifedipine with a correlation coefficient of 0.9985 and the drug combined with CDNBD at a stoichiometric ratio of 2:1. The method has limits of detection and quantitation of 0.1344 µg mL-1 and 0.4074 µg mL-1 respectively. The Sandell’s sensitivity obtained is 4.673 ng/cm2 and the method was reproducible over a three day assessment. Intra- and inter-day accuracies (in terms of errors) were of the order -0.008 to 3.22 % while precisions were generally less than 3.1 % (RSD).
Conclusions
The developed spectrophotometric method is of equivalent accuracy (p > 0.05) with USP 2007 HPLC method. It has the advantages of speed, simplicity, sensitivity and more affordable instrumentation and could find application as a rapid and sensitive analytical method for nifedipine. It is the first described method by azo dye derivatization for the analysis of nifedipine in bulk samples and dosage forms.
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Omara HA, Amin AS. Extractive-spectrophotometric methods for determination of anti-Parkinsonian drug in pharmaceutical formulations and in biological samples using sulphonphthalein acid dyes. JOURNAL OF SAUDI CHEMICAL SOCIETY 2012. [DOI: 10.1016/j.jscs.2010.11.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Vinay KB, Revannasiddappa HD, Rajendraprasad N, Ramesh PJ, Xavier CM, Basavaiah K. Use of two sulfonthalein dyes in the extraction-free spectrophotometric assay of tramadol in dosage forms and in spiked human urine based on ion-pair reaction. Drug Test Anal 2011; 4:116-22. [PMID: 21290614 DOI: 10.1002/dta.247] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Revised: 11/25/2010] [Accepted: 11/29/2010] [Indexed: 11/07/2022]
Abstract
Tramadol is a centrally acting analgesic used in the prevention and treatment of moderate to severe pain. Two sensitive, selective, and rapid spectrophotometric methods are described for the determination of tramadol in its dosage forms and in spiked human urine. The methods are based on formation of yellow ion-pairs between tramadol and two sulfonthalein dyes; bromocresol purple (BCP) and bromocresol green (BCG) in dichloromethane medium followed by absorbance measurement at 400 and 410 nm, respectively. Under the optimum conditions, tramadol could be assayed in the concentration ranges, 1-15 and 1-16 µg ml(-1) with correlation coefficient greater than 0.999 in both cases. The molar absorptivity values are calculated to be 1.84 × 10(4) and 1.97 × 10(4) l mol(-1) cm(-1) for BCP and BCG methods, respectively; and the corresponding Sandell sensitivity values are 0.0143 and 0.0134 µg cm(-2). The limits of detection (LOD) and quantification (LOQ) have also been reported. The stoichiometry of the reaction was found to be 1:1 in both cases and the conditional stability constant (K(f)) values of the ion pairs have been calculated. The within-day and between-day RSD were 0.9-1.96% and 1.56-3.21%, respectively. The methods were successfully applied to the determination of tramadol in tablets and injections and also in spiked human urine with good recoveries. The procedures are simple, accurate, and suitable for quality control application.
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Affiliation(s)
- Kanakapura B Vinay
- Department of Chemistry, Manasagangothri, University of Mysore, Mysore 570 006, Karnataka, India
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Kuminek G, Tagliari MP, Granada A, Bertol CD, Langassner SZ, Silva MAS, Stulzer HK. DEVELOPMENT AND VALIDATION OF A RAPID AND SIMPLE STABILITY-INDICATING LC METHOD FOR NIFEDIPINE. J LIQ CHROMATOGR R T 2010. [DOI: 10.1080/10826076.2010.518936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Gislaine Kuminek
- a Laboratório de Controle de Qualidade, Departamento de Ciências Farmacêuticas , Universidade Federal de Santa Catarina , Florianópolis, Brazil
| | - Monika Piazzon Tagliari
- a Laboratório de Controle de Qualidade, Departamento de Ciências Farmacêuticas , Universidade Federal de Santa Catarina , Florianópolis, Brazil
| | - Andrea Granada
- a Laboratório de Controle de Qualidade, Departamento de Ciências Farmacêuticas , Universidade Federal de Santa Catarina , Florianópolis, Brazil
| | - Charise Dalazen Bertol
- a Laboratório de Controle de Qualidade, Departamento de Ciências Farmacêuticas , Universidade Federal de Santa Catarina , Florianópolis, Brazil
| | - Silvana Zucolotto Langassner
- b Laboratório de Química Farmacêutica, Departamento de Ciências Farmacêuticas , Universidade Federal de Santa Catarina, Campus Universitário Trindade , Florianópolis, Brazil
| | - Marcos Antonio Segatto Silva
- a Laboratório de Controle de Qualidade, Departamento de Ciências Farmacêuticas , Universidade Federal de Santa Catarina , Florianópolis, Brazil
| | - Hellen Karine Stulzer
- a Laboratório de Controle de Qualidade, Departamento de Ciências Farmacêuticas , Universidade Federal de Santa Catarina , Florianópolis, Brazil
- c Laboratório de Controle de Qualidade, Departamento de Ciências Farmacêuticas , Universidade Estadual de Ponta Grossa , Ponta Grossa, Brazil
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Shapovalov SA, Kiseleva YS. Heteroassociation of the bromine-containing anions of sulfophthaleins in aqueous solution. Russ Chem Bull 2010. [DOI: 10.1007/s11172-010-0241-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Shahdousti P, Aghamohammadi M, Alizadeh N. Spectrophotometric study of the charge-transfer and ion-pair complexation of methamphetamine with some acceptors. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2008; 69:1195-200. [PMID: 17905645 DOI: 10.1016/j.saa.2007.06.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2007] [Revised: 06/13/2007] [Accepted: 06/25/2007] [Indexed: 05/17/2023]
Abstract
The charge-transfer (CT) complexes of methamphetamine (MPA) as a n-donor with several acceptors including bromocresolgreen (BCG), bromocresolpurple (BCP), chlorophenolred (CPR), picric acid (PIC), and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) have been studied spectrophotometrically in chloroform solutions in order to obtain some information about their stoichiometry and stability of complexation. The oscillator strengths, transition dipole moments and resonance energy of the complex in the ground state for all complexes have been calculated. Vertical ionization potential of MPA and electron affinity of acceptors were determined by ab initio calculation. The acceptors were also used to utilize a simple and sensitive extraction-spectrophotometric method for the determination of MPA. The method is based on the formation of 1:1 ion-pair association complexes of MPA with BCG, BCP and PIC in chloroform medium. Beer's plots were obeyed in a general concentration range of 0.24-22 microg ml(-1) for the investigated drug with different acceptors. The proposed methods were applied successfully for the determination of MAP in pure and abuse drug with good accuracy and precision.
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Manjunatha D, Shaikh S, Harikrishna K, Sudhirkumar R, Kandagal P, Seetharamappa J. Simple and sensitive spectrophotometric methods for the determination of acebutolol hydrochloride in bulk sample and pharmaceutical preparations. ECLÉTICA QUÍMICA 2008. [DOI: 10.1590/s0100-46702008000200005] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Sudhir Kumar R, Manjunatha DH, Shaikh SMT, Seetharamappa J, Harikrishna K. Sensitive extractive spectrophotometric methods for the determination of trazodone hydrochloride in pharmaceutical formulations. Chem Pharm Bull (Tokyo) 2006; 54:968-71. [PMID: 16819213 DOI: 10.1248/cpb.54.968] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Two simple, rapid and sensitive extractive spectrophotometric methods have been developed for the assay of trazodone hydrochloride (TRH) in pure and pharmaceutical formulations. These methods are based on the formation of chloroform soluble ion-association complexes of TRH with bromothymol blue (BTB) and with bromocresol purple (BCP) in KCl-HCl buffer of pH 2.0 (for BTB) and in NaOAc-AcOH buffer of pH of 3.6 (for BCP) with absorption maximum at 423 nm and at 408 nm for BTB and BCP, respectively. Reaction conditions were optimized to obtain the maximum color intensity. The absorbance was found to increase linearly with increase in concentration of TRH, which was corroborated by the calculated correlation coefficient values (0.9996, 0.9945). The systems obeyed Beer's law in the range of 0.2-14.5 and 0.2-14.1 microg/ml for BTB and BCP, respectively. Various analytical parameters have been evaluated and the results have been validated by statistical data. No interference was observed from common excipients present in pharmaceutical formulations. The proposed methods are simple, accurate and suitable for quality control applications.
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El-Didamony AM. Extractive Spectrophotometric Methods for the Determination of Oxomemazine Hydrochloride in Bulk and Pharmaceutical Formulations Using Bromocresol Green, Bromocresol Purple and Bromophenol Blue. Arch Pharm (Weinheim) 2005; 338:190-7. [PMID: 15864789 DOI: 10.1002/ardp.200400947] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Three simple, sensitive and accurate spectrophotometric methods have been developed for the determination of oxomemazine hydrochloride in bulk and pharmaceutical formulations. These methods are based on the formation of yellow ion-pair complexes between the examined drug and bromocresol green (BCG), bromocresol purple (BCP), and bromophenol blue (BPB) as sulphophthalein dyes in acetate-HCl buffer of pH 3.6, 3.4, and 4.0, respectively. The formed complexes were extracted with dichloromethane and measured at 405 nm for all three systems. The best conditions of the reactions were studied and optimized. Beer's law was obeyed in the concentration ranges 2.0-12, 2.0-13, and 2.0-14 microg mL(-1) with molar absorptivities of 3.2 x 10(4), 3.7 x 10(4), and 3.1 x 10(4) L mol(-1) cm(-1) for the BCG, BCP, and BPB methods, respectively. Sandell's sensitivity, correlation coefficient, detection and quantification limits are also calculated. The proposed methods have been applied successfully for the analysis of the drug in pure form and in its dosage forms. No interference was observed from common pharmaceutical excipients. Statistical comparison of the results with those obtained by HPLC method shows excellent agreement and indicates no significant difference in accuracy and precision.
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Affiliation(s)
- Akram M El-Didamony
- Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt.
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