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Scremin J, Sartori ER. Simultaneous determination of nifedipine and atenolol in combined dosage forms using a boron-doped diamond electrode with differential pulse voltammetry. CAN J CHEM 2018. [DOI: 10.1139/cjc-2017-0302] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Combinations of nifedipine (NIF) and atenolol (ATN) are used for the treatment of arterial hypertension. Dosages values different from those presented on the label of pharmaceuticals can significantly impact a consumer’s health. To control the quality of the pharmaceuticals effectively, a method for the simultaneous determination of these both drugs using an anodically pretreated boron-doped diamond electrode coupled to differential pulse voltammetry technique was developed. The influence of supporting electrolyte, pH and scan rate on the current response of these both antihypertensives was examined to select the optimum experimental conditions. It was found that NIF and ATN provided two well-shaped and reproducible oxidation peaks at 0.97 V and 1.36 V (vs. Ag/AgCl electrode), respectively, in TRIS buffer solution (pH 8.0). At optimized differential pulse voltammetric parameters, the current response of NIF and ATN was proportionally linear in the concentration range of 3.98–107 μmol L–1 and 1.99–47.2 μmol L–1, with detection limit of 0.612 and 0.999 μmol L−1, respectively. The proposed method was successfully applied in analysis of several commercial combined dosage forms, whose accuracy was attested by good agreement of the results (paired t test at a 95% confidence level) with those obtained using high performance liquid chromatography.
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Affiliation(s)
- Jessica Scremin
- Universidade Estadual de Londrina (UEL), Centro de Ciências Exatas, Departamento de Química, Rodovia Celso Garcia Cid, PR 445 Km 380, Londrina – PR, C.P. 10.011, 86057-970, Brazil
- Universidade Estadual de Londrina (UEL), Centro de Ciências Exatas, Departamento de Química, Rodovia Celso Garcia Cid, PR 445 Km 380, Londrina – PR, C.P. 10.011, 86057-970, Brazil
| | - Elen Romão Sartori
- Universidade Estadual de Londrina (UEL), Centro de Ciências Exatas, Departamento de Química, Rodovia Celso Garcia Cid, PR 445 Km 380, Londrina – PR, C.P. 10.011, 86057-970, Brazil
- Universidade Estadual de Londrina (UEL), Centro de Ciências Exatas, Departamento de Química, Rodovia Celso Garcia Cid, PR 445 Km 380, Londrina – PR, C.P. 10.011, 86057-970, Brazil
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El-Ragehy NA, Hassan NY, Tantawy MA, Abdelkawy M. Simultaneous Determination of Aspirin, Dipyridamole and Two of Their Related Impurities in Capsules by Validated TLC-Densitometric and HPLC Methods. J Chromatogr Sci 2016; 54:1120-8. [DOI: 10.1093/chromsci/bmw077] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Indexed: 11/12/2022]
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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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Damiani PC. Determination of atenolol in human urine by emission–excitation fluorescence matrices and unfolded partial least-squares with residual bilinearization. Talanta 2011; 85:1526-34. [DOI: 10.1016/j.talanta.2011.06.043] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2011] [Revised: 06/10/2011] [Accepted: 06/14/2011] [Indexed: 12/20/2022]
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Wang L, Tang Y. Determination of dipyridamole using TCPO-H2O2 chemiluminescence in the presence of silver nanoparticles. LUMINESCENCE 2011; 26:703-9. [DOI: 10.1002/bio.1301] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Revised: 03/02/2011] [Accepted: 03/03/2011] [Indexed: 11/08/2022]
Affiliation(s)
| | - Yuhai Tang
- College of Science; Xi'an Jiaotong University; Xi'an; People's Republic of China
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Behpour M, Honarmand E, Ghoreishi S. Nanogold-modified Carbon Paste Electrode for the Determination of Atenolol in Pharmaceutical Formulations and Urine by Voltammetric Methods. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.04.845] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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7
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Panahi H, Rahimi A, Moniri E, Izadi A, Parvin M. HPTLC separation and quantitative analysis of aspirin, salicylic acid, and sulfosalicylic acid. JPC-J PLANAR CHROMAT 2010. [DOI: 10.1556/jpc.23.2010.2.10] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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8
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Shamsipur M, Jalali F, Haghgoo S. Preparation of an Atenolol Ion‐Selective Electrode and its Application to Pharmaceutical Analysis. ANAL LETT 2005. [DOI: 10.1081/al-200047762] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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9
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Rahman N, Ahmad Khan N, Hejaz Azmi SN. Extractive spectrophotometric methods for the determination of nifedipine in pharmaceutical formulations using bromocresol green, bromophenol blue, bromothymol blue and eriochrome black T. ACTA ACUST UNITED AC 2004; 59:47-54. [PMID: 14751316 DOI: 10.1016/j.farmac.2003.10.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four simple, sensitive and accurate spectrophotometric methods have been developed for the determination of nifedipine in pharmaceutical formulations. These methods are based on the formation of ion-pair complexes of amino derivative of the nifedipine with bromocresol green (BCG), bromophenol blue (BPB), bromothymol blue (BTB) and eriochrome black T (EBT) in acidic medium. The coloured products are extracted with chloroform and measured spectrophotometrically at 415 nm (BCG, BPB and BTB) and 520 nm (EBT). Beer's law was obeyed in the concentration range of 5.0-32.5, 4.0-37.5, 6.5-33.0 and 4.5-22.5 microg ml(-1) with molar absorptivity of 6.41 x 10(3), 4.85 x 10(3), 5.26 x 10(3) and 7.69 x 10(3) l mol(-1) cm(-1) and relative standard deviation of 0.82%, 0.72%, 0.66% and 0.68% for BCG, BPB, BTB and EBT methods, respectively. These methods have been successfully applied for the assay of drug in pharmaceutical formulations. No interference was observed from common pharmaceutical adjuvants. Statistical comparison of the results with the reference method shows excellent agreement and indicates no significant difference in accuracy and precision.
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Affiliation(s)
- Nafisur Rahman
- Department of Chemistry, Analytical Chemistry Division, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India.
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Ghoneim MM, Tawfik A, Khashaba PY. Cathodic adsorptive stripping square-wave voltammetric determination of nifedipine drug in bulk, pharmaceutical formulation and human serum. Anal Bioanal Chem 2003; 375:369-75. [PMID: 12589501 DOI: 10.1007/s00216-002-1703-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2002] [Revised: 11/03/2002] [Accepted: 11/14/2002] [Indexed: 11/29/2022]
Abstract
Nifedipine is a calcium-channel antagonist drug used in the management of angina pectoris and hypertension through inhibition of calcium influx. A fully validated sensitive cathodic adsorptive stripping square-wave voltammetry procedure was optimized for the determination of the drug at trace levels. The procedure was based on the reduction of the nitrophenyl group after the interfacial accumulation of the drug onto a hanging mercury drop electrode in Britton-Robinson buffer of pH 11.0. The optimal conditions of the procedure were found to be: accumulation potential=-0.9 V vs. Ag/AgCl/KCl(s)), accumulation time=30 s, scan increment=10 mV, pulse amplitude=50 mV and frequency=120 Hz. Under these conditions, a well-defined peak was obtained; its peak current showed a linear dependence on drug concentration in the range of 2x10(-9)-2x10(-7) mol L(-1) bulk nifedipine. The mean recoveries based on eight replicate measurements for 1x10(-8) and 5x10(-8) mol L(-1) bulk nifedipine solutions were 98.46+/-0.86% and 98.23+/-0.92%, respectively. A detection limit of 3.42x10(-10) mol L(-1) bulk nifedipine was achieved. The procedure was successfully applied for assay of the drug in tablets and spiked human serum with mean recoveries of 101.95+/-1.42% and 98.70+/-0.63%, respectively. The limit of detection of the drug in spiked human serum was found to be 3.90x10(-10) mol L(-1).
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Affiliation(s)
- M M Ghoneim
- Department of Chemistry, Faculty of Science, Tanta University, Egypt.
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Özaltın N, Nemutlu E, Yardımcı C, Süslü İ. Application of Micellar Electrokinetic Capillary Chromatography for the Determination of Nifedipine and Its Degradation Product in Pharmaceutical Preparations. ANAL LETT 2003. [DOI: 10.1081/al-120017697] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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12
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Rahman N, Hoda MN. Spectrophotometric method for the determination of nifedipine with 4-(methylamino)phenol and potassium dichromate. FARMACO (SOCIETA CHIMICA ITALIANA : 1989) 2002; 57:435-41. [PMID: 12088057 DOI: 10.1016/s0014-827x(02)01228-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A new simple, sensitive and reproducible spectrophotometric method for the determination of nifedipine in pure and dosage forms has been proposed. It is based on the reduction of nifedipine with Zn/NNH4Cl, followed by coupling with N-methyl-1,4-benzoquinoneimine--the oxidation product of 4-(methylamino)phenol, to give a chromophore which absorbed maximally at 525 nm. The experimental conditions were optimised and Beer's law was obeyed over the concentration range of 5-175 microg ml(-1). The molar absorptivity, detection limit, recovery and RSD were found to be 1.9 x 10(3) l mol(-1) cm(-1), 1.1 microg ml(-1), 99.7-100.5% and 0.3-0.8%, respectively. The proposed method was compared favourably with the official B.P. method.
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Affiliation(s)
- Nafisur Rahman
- Department of Chemistry, Aligarh Muslim University, India.
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Umapathi P, Parimoo P, Thomas SK, Agarwal V. Spectrofluorometric estimation of aspirin and dipyridamole in pure admixtures and in dosage forms. J Pharm Biomed Anal 1997; 15:1703-8. [PMID: 9260666 DOI: 10.1016/s0731-7085(96)01918-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Aspirin and dipyridamole in pure admixtures and in dosage forms have been estimated by spectrofluorometry. Aspirin (2-12 mcg ml-1) was estimated in 1% v/v glacial acetic acid in chloroform using 246 and 345 nm for excitation and emission respectively. Dipyridamole (2-12 mcg ml-1) has been estimated in chloroform using 420 nm for excitation and 475 nm for emission. The non-interference of the excipients as well as the drugs in the estimation of each other, as evidenced by the results, indicate that this method may be used for the routine estimation of aspirin and dipyridamole in tablet preparations.
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Affiliation(s)
- P Umapathi
- Department of Pharmacy, Birla Institute of Technology and Science, Pilani Rajasthan, India
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Umapathi P, Parimoo P. Second-order derivative spectrophotometric assay for imipramine hydrochloride and diazepam in pure admixtures and in dosage forms. J Pharm Biomed Anal 1995; 13:1003-9. [PMID: 8580144 DOI: 10.1016/0731-7085(95)01316-d] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The determination of imipramine HCl and diazepam in tablets by derivative spectrophotometry is described. The drugs in combined preparations have been quantified using the second-order derivative spectra of their solutions in 0.1 M HCl. The method has been applied to pure drug mixtures as well as commercial preparations and was found to be precise and reproducible. Compliance of Beer's Law was observed in the concentration range of 10-70 micrograms ml-1 for imipramine HCl and 2-8 micrograms ml-1 for diazepam. Lower limits of detection at the 95% confidence level were 1.96 micrograms ml-1 for imipramine HCl and 0.21 microgram ml-1 for diazepam.
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Affiliation(s)
- P Umapathi
- Department of Pharmacy, Birla Institute of Technology and Science, Pilani, Rajasthan State, India
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