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Shaheen HA, Bahaffi SO, Khedr AM. A Sensitive Liquid Chromatography-Mass Spectrometric Method for Determination of Bisoprolol in Rat Serum after Pre-Column Derivatization. J Chromatogr Sci 2023:bmad056. [PMID: 37507107 DOI: 10.1093/chromsci/bmad056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 06/20/2023] [Accepted: 07/12/2023] [Indexed: 07/30/2023]
Abstract
Two derivatization regents were reacted with bisoprolol (BIS), followed by liquid-chromatography-mass spectrometric analysis. 3-Bromomethyl-propyphenazone (BMP) and dansyl-chloride (Dns-Cl) were reacted via the secondary amino group using a catalyst to accelerate the reaction progress and completeness with minimal reaction byproducts. The sensitivity and the ionization efficiency of both BIS-methyl-propyphenazone (BIS-MP) and BIS-Dns via electrospray ionization were studied. The sensitivity of BIS-MP was superior to BIS-Dns. The derivatization procedure, extraction procedure, and LC-MS method were optimized and validated to achieve the monitoring of BIS in rat serum at a picogram scale. The calibration curve showed a regression coefficient value of 0.999 within a concentration spanning a range of 10-500 pg/mL. The detection limit and quantitation were 4 and 10 pg/mL, respectively. The intraday and inter-day precision values (% relative standard deviation) ranged from 0.53 to 6.91%, whereas the accuracy values (expressed as % error) ranged from -4.20 to -0.77%. The pharmacokinetic parameters were: 15,280 pg/mL for a maximum concentration of BIS (Cmax) at the maximum time (Tmax) of 1 h. BIS's elimination half-life (t1/2) was determined to be 3 h. The value of the area under the concentration-time curve (AUC0 - t) was 34,370 pg/mL h.
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Affiliation(s)
- Huda A Shaheen
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Saleh O Bahaffi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Alaa M Khedr
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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2
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Gatti R, Morigi R. 1,4-Anthraquinone: A new useful pre-column reagent for the determination of N -acetylcysteine and captopril in pharmaceuticals by high performance liquid chromatography. J Pharm Biomed Anal 2017. [DOI: 10.1016/j.jpba.2017.06.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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3
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Khedr A, El-Hay SS, Kammoun AK. Liquid chromatography-tandem mass spectrometric determination of propofol in rat serum and hair at attogram level after derivatization with 3-bromomethyl-propyphenazone. J Pharm Biomed Anal 2017; 134:195-202. [DOI: 10.1016/j.jpba.2016.11.051] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Revised: 11/23/2016] [Accepted: 11/27/2016] [Indexed: 11/17/2022]
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4
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Pasquini B, Orlandini S, Caprini C, Del Bubba M, Innocenti M, Brusotti G, Furlanetto S. Cyclodextrin- and solvent-modified micellar electrokinetic chromatography for the determination of captopril, hydrochlorothiazide and their impurities: A Quality by Design approach. Talanta 2016; 160:332-339. [DOI: 10.1016/j.talanta.2016.07.038] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 07/12/2016] [Accepted: 07/20/2016] [Indexed: 10/21/2022]
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5
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Hasanzadeh M, Pournaghi-Azar MH, Shadjou N, Jouyban A. Electropolymerization of taurine on gold surface and its sensory application for determination of captopril in undiluted human serum. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 38:197-205. [PMID: 24656369 DOI: 10.1016/j.msec.2014.01.051] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 12/30/2013] [Accepted: 01/29/2014] [Indexed: 10/25/2022]
Abstract
Polytaurine film was electrodeposited on gold (Au) electrode through cyclic voltammetry from taurine and phosphate buffer solution. The electrocatalytic effect of polytaurine modified Au (PT/Au) electrode was investigated for electro-oxidation of captopril (CAP). Electrocatalytical activity of PT/Au electrode was studied using cyclic voltammetry (CV), chronoamperometry and differential pulse voltammetry (DPV). DPV was used to evaluate the analytical performance of CAP in the presence of phosphate buffer solution and good limit of detection was obtained by this sensor. The experimental conditions influencing the determination of CAP were optimized and under optimal conditions, the oxidation peak current was proportional to CAP concentration in the range of 0.06-0.2 μM, while the detection limit was 0.03 μM (S/N=3). The results revealed that PT promotes the rate of oxidation by increasing the peak current. Finally, the applicability of the method to direct assay of human serum is described. The proposed sensor was successfully applied to determine cadaverine in fish samples, yielding satisfactory results. The spiked recoveries were in the range of 96.0-105.0%.
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Affiliation(s)
- Mohammad Hasanzadeh
- Drug Applied Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz 51664, Iran
| | | | - Nasrin Shadjou
- Biochemistry Department, Genetic and Metabolism Group, Pasteur Institute of Iran, P.O. Box 13164 Tehran, Iran
| | - Abolghasem Jouyban
- Drug Applied Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz 51664, Iran.
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Lu S, Lu P, Li C, Wang C, Yu J. Highly Improved Electrooxidation of Captopril on Copper Hexacyanoferrate/Ordered Mesoporous Carbon-Modified Glassy Carbon Electrode. Aust J Chem 2014. [DOI: 10.1071/ch13650] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Using an electrochemical polymerization process, a copper hexacyanoferrate/ordered mesoporous carbon-modified glassy carbon electrode (CuHCF/OMC/GCE) was prepared. The performance of CuHCF/OMC was compared with that of CuHCF and the properties of the new material were improved. A sensor for sensitive detection of captopril was developed based on CuHCF/OMC-modified glassy carbon electrode. The composition and morphology of the as-prepared CuHCF/OMC products were characterized by energy-dispersive X-ray spectroscopy and scanning electron microscopy. The electrochemical behaviour and electrocatalytic performance of the CuHCF/OMC-modified glassy carbon electrode towards the oxidation of captopril were evaluated by cyclic voltammetry. Results showed that the CuHCF/OMC-modified electrode exhibits two well-defined redox peaks. The linear range for the detection of captopril was from 1.0 × 10–5 to 2.7 × 10–3 M, with a correlation coefficient of 0.999, and the detection limit was 1.2 × 10–6 M based on a signal-to-noise ratio of 3.
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Gatti R, Vitellaro V. High performance liquid chromatography analysis of aliphatic thiols in alimentary supplements and pharmaceuticals using menadione as a new useful derivatization reagent. Anal Chim Acta 2013; 804:273-9. [DOI: 10.1016/j.aca.2013.09.059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 09/26/2013] [Accepted: 09/28/2013] [Indexed: 10/26/2022]
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8
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Sultana N, Arayne MS, Naveed S. Simultaneous Quantitation of Captopril and NSAID's in API, Dosage Formulations and Human Serum by RP-HPLC. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201000010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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9
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Chekin F, Toluo A. Functionalization of Multi Carbon Nanotubes with 1,2-Naphthoquinone-4-sulfonic Acid Sodium: A Novel Sulphydryl Compounds Sensor Based on Functionalized Carbon Nanotube Film Using Michael Addition. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201200666] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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10
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Mazloum-Ardakani M, Sheikh-Mohseni MA, Mirjalili BF, Zamani L. Simultaneous determination of captopril, acetaminophen and tryptophan at a modified electrode based on carbon nanotubes. J Electroanal Chem (Lausanne) 2012. [DOI: 10.1016/j.jelechem.2012.09.021] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Gatti R, Andreatta P, Boschetti S. Study of 1,4-naphthoquinone as a new useful derivatization reagent for LC analysis of aliphatic thiols in dietary supplements and pharmaceuticals. Anal Bioanal Chem 2012; 405:817-25. [DOI: 10.1007/s00216-012-6250-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Revised: 07/02/2012] [Accepted: 07/04/2012] [Indexed: 10/28/2022]
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12
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RP-HPLC–UV method coupled with post-column iodine-azide reaction for determination of free captopril in urine samples. Bioanalysis 2012; 4:1481-9. [DOI: 10.4155/bio.12.113] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background: A free urinary captopril is measured indirectly employing the iodine-azide reaction in post-column mode. The pre-clean-up and/or derivatization step is needless, so that the method is adequate for rapid captopril determination in the urine samples and its monitoring at clinical trial. Captopril is separated on a C4 column by the eluate composed of sodium azide solution (4% [w/v], pH 5.8), acetonitrile and water at a ratio of 50:5:45 (v/v/v). The linearity exists in the range from 0.06 to 2.25 µmol/ml of urine. LOD and LOQ receive 0.03 and 0.06 µmol/ml of urine, respectively. Results: Inter-day precision and accuracy of measurements of the captopril-spiked urine samples were 9, 8 and 5%, and 104, 107 and 105%, respectively, for 0.060 (low level), 0.50 (medium level) and 1.25 (high level) µmol/ml of urine. Conclusion: Captopril content was determined in real urine samples delivered from patients treated with this drug.
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Highly sensitive voltammetric sensor based on catechol-derivative-multiwall carbon nanotubes for the catalytic determination of captopril in patient human urine samples. Colloids Surf B Biointerfaces 2011; 87:480-8. [DOI: 10.1016/j.colsurfb.2011.06.013] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2010] [Revised: 04/24/2011] [Accepted: 06/09/2011] [Indexed: 11/20/2022]
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14
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Ultraviolet derivatization of low-molecular-mass thiols for high performance liquid chromatography and capillary electrophoresis analysis. J Chromatogr B Analyt Technol Biomed Life Sci 2011; 879:1290-307. [DOI: 10.1016/j.jchromb.2010.10.035] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2010] [Revised: 10/20/2010] [Accepted: 10/28/2010] [Indexed: 11/30/2022]
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15
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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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16
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Gouda AA, Amin AS. Copper(II)–neocuproine reagent for spectrophotometric determination of captopril in pure form and pharmaceutical formulations. ARAB J CHEM 2010. [DOI: 10.1016/j.arabjc.2010.04.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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17
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Medvedovici A, Albu F, Sora ID, Udrescu S, Galaon T, David V. Assay of free captopril in human plasma as monobromobimane derivative, using RPLC/(+)ESI/MS/MS: validation aspects and bioequivalence evaluation. Biomed Chromatogr 2009; 23:1092-100. [PMID: 19402182 DOI: 10.1002/bmc.1229] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A sensitive method for determination of free captopril as monobromobimane derivative in plasma samples is discussed. The internal standard (IS) was 5-methoxy-1H-benzimidazole-2-thiol. Derivatization with monobromobimane immediately after blood collection and plasma preparation prevents oxidation of captopril to the corresponding disulfide compound and enhances the ionization yield. Consequently, derivatization enhances sample stability and detection sensitivity. Addition of the internal standard was made immediately after plasma preparation. The internal standard was also derivatized by monobromobimane, as it contains a thiol functional group. Preparation of plasma samples containing captopril and IS derivatives was based upon protein precipitation through addition of acetonitrile, in a volumetric ratio 1:2. The reversed-phase liquid chromatographic separation was achieved on a rapid resolution cartridge Zorbax SB-C(18), monitored through positive electrospray ionization and tandem MS detection using the multiple-reaction monitoring mode. Transitions were 408-362 amu for the captopril derivative and 371-260 amu for the internal standard derivative. The kinetics of captopril oxidation to the corresponding disulfide compound in plasma matrix was also studied using the proposed method. A linear log-log calibration was obtained over the concentration interval 2.5-750 ng/mL. A low limit of quantitation in the 2.5 ng/mL range was obtained. The analytical method was fully validated and successfully applied in a three-way, three-period, single-dose (50 mg), block-randomized bioequivalence study for two pharmaceutical formulations (captopril LPH 25 and 50 mg) against the comparator Capoten 50 mg.
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Affiliation(s)
- Andrei Medvedovici
- Labormed Pharma S.A., Splaiul Independentei no. 319 E, Bucharest 060044, Romania
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18
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Zacharis CK, Tzanavaras PD, Themelis DG. Ethyl-propiolate as a novel and promising analytical reagent for the derivatization of thiols: Study of the reaction under flow conditions. J Pharm Biomed Anal 2009; 50:384-91. [DOI: 10.1016/j.jpba.2009.05.020] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2009] [Revised: 05/22/2009] [Accepted: 05/22/2009] [Indexed: 10/20/2022]
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19
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Kuśmierek K, Chwatko G, Głowacki R, Bald E. Determination of endogenous thiols and thiol drugs in urine by HPLC with ultraviolet detection. J Chromatogr B Analyt Technol Biomed Life Sci 2009; 877:3300-8. [DOI: 10.1016/j.jchromb.2009.03.038] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2009] [Revised: 03/20/2009] [Accepted: 03/25/2009] [Indexed: 10/20/2022]
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20
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Karimi-Maleh H, Ensafi AA, Allafchian AR. Fast and sensitive determination of captopril by voltammetric method using ferrocenedicarboxylic acid modified carbon paste electrode. J Solid State Electrochem 2009. [DOI: 10.1007/s10008-008-0781-2] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Elshanawane AA, Mostafa SM, Elgawish MS. Development and Validation of LC Method for Simultaneous Determination of Two Binary Mixtures Containing Indapamide. Chromatographia 2008. [DOI: 10.1365/s10337-008-0600-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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22
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Dinç E. SPECTRAL ANALYSIS OF BENAZEPRIL HYDROCHLORIDE AND HYDROCHLOROTHIAZIDE IN PHARMACEUTICAL FORMULATIONS BY THREE CHEMOMETRIC TECHNIQUES. ANAL LETT 2007. [DOI: 10.1081/al-120004553] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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23
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Ziyatdinova GK, Budnikov GK, Pogorel’tsev VI. Determination of captopril in pharmaceutical forms by stripping voltammetry. JOURNAL OF ANALYTICAL CHEMISTRY 2006. [DOI: 10.1134/s1061934806080144] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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Huang T, He Z, Yang B, Shao L, Zheng X, Duan G. Simultaneous determination of captopril and hydrochlorothiazide in human plasma by reverse-phase HPLC from linear gradient elution. J Pharm Biomed Anal 2006; 41:644-8. [PMID: 16413728 DOI: 10.1016/j.jpba.2005.12.007] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2005] [Revised: 12/02/2005] [Accepted: 12/05/2005] [Indexed: 11/26/2022]
Abstract
A simple, rapid and sensitive high-performance liquid chromatographic method for the simultaneous determination of captopril and hydrochlorothiazide in human plasma samples was developed. Captopril was derivatized with 2,4'-dibromoacetophenone (pBPB) to form a captopril-pBPB adduct. From acidified serum plasma samples, the hydrochlorothiazide and derivatized captopril was extracted with 5 ml ether, then with 5 ml dichloromethane. Effective chromatographic separation was achieved using a C(18) column (DIAMONSIL 150 mmx4 mm i.d., 5 microm) based on an acetonitrile-trifluoroacetic acid-water gradient elution at a flow rate of 1.2 ml/min. The internal standard (IS), derivatized captopril and hydrochlorothiazide were detected at 263 nm and were eluted at 4.2, 6.8 and 16.9 min, respectively. No endogenous substances were found to interfere. The limit of quantification for hydrochlorothiazide and derivatized captopril in plasma were 3.3 and 7 ng/ml. The calibration curve for derivatized captopril showed linearity in the range 20-4000 ng/ml, with a regression coefficient corresponding to 0.9993 and the coefficient of the variation of the points of the calibration curve being lower than 10%. The calibration curve for hydrochlorothiazide showed linearity in the range 10-1200 ng/ml, with a regression coefficient corresponding to 0.9999 and the coefficient of the variation of the points of the calibration curve being lower than 10%. The method was suitably validated and successfully applied to the determination of captopril and hydrochlorothiazide in human plasma samples.
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Affiliation(s)
- Taomin Huang
- Department of Pharmacy, Fudan University, Shanghai 200032, PR China
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Salem II, Saif WA, Jmeian Y, Al Tamimi JI. A selective and rapid method for the quantification of captopril in human plasma using liquid chromatography/selected reaction monitoring mass spectrometry. J Pharm Biomed Anal 2005; 37:1073-80. [PMID: 15862687 DOI: 10.1016/j.jpba.2004.07.039] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2004] [Revised: 07/29/2004] [Accepted: 07/31/2004] [Indexed: 10/26/2022]
Abstract
A specific hyphenated high performance liquid chromatography-mass spectrometric (LC-MS/MS) assay was developed for the determination of captopril in plasma. The drug was extracted from plasma using liquid-liquid extraction with a mixture of diethylether:dichloromethane. After the addition of the internal standard, samples were applied to a prepacked C8 Waters Symmetry column. The ion trap MS/MS detector was equipped with electrospray ionization (ESI) source operating in the positive ion mode. Drug determination was accomplished monitoring captopril at molecular ion m/z 218 and MS/MS (daughter) at m/z 171.6. The method was applied to captopril determination in human plasma after the administration of captopril 50 mg tablets to healthy volunteers who have participated in a pharmacokinetic study. The method was proved to be specific and precise by testing six different plasma batches. Linearity was established for the range of concentrations 25-3000 ng/ml with a regression factor of 0.9995. Intra-day accuracy ranged from 90.16 to 96.18%, while the intra-day precision ranged from 2.60 to 9.66% at the concentrations of 75, 1440 and 2500 ng/ml. Inter-day precision of the method ranged from 5.04 to 10.10%. This validated method of analysis was successfully applied to human plasma analyses after the administration of a single dose of 50 mg captopril tablets to healthy volunteers.
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Affiliation(s)
- Isam Ismail Salem
- ACDIMA Center for Bioequivalence and Pharmaceutical Studies, P.O. Box 925161, Amman 11190, Jordan.
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El-Shabrawy Y, El-Enany N, Salem K. Sensitive kinetic spectrophotometric determination of captopril and ethamsylate in pharmaceutical preparations and biological fluids. ACTA ACUST UNITED AC 2004; 59:803-8. [PMID: 15474057 DOI: 10.1016/j.farmac.2004.05.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2003] [Revised: 04/10/2004] [Accepted: 05/04/2004] [Indexed: 11/17/2022]
Abstract
A highly sensitive kinetic spectrophotometric method was developed for the determination of captopril (CPL) and ethamsylate (ESL) in pharmaceutical preparations and biological fluids. The method is based on a catalytic acceleration of the reaction between sodium azide and iodine in an aqueous solution. Concentration range of 0.1-1.5 microg ml(-1) for CPL and 0.3-3 microg ml(-1) for ESL was determined by measuring the decrease in the absorbance of iodine at 348 nm by a fixed time method. The decrease in absorbance after 5 min was markedly correlated to the concentration. The relative standard deviations obtained were 1.30 and 1.87 for CPL and ESL, respectively, in pure forms. Correlation coefficients were 0.9997 and 0.9999 for CPL and ESL, respectively. The detection limits were determined as (S/N = 3) were 20 ng ml(-1) for CPL and 50 ng ml(-1) for ESL. The proposed procedure was successively applied for the determination of both drugs in pharmaceutical preparations and in biological fluids.
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Affiliation(s)
- Y El-Shabrawy
- Department of Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt.
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27
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El-Gindy A, Emara S, Hadad GM. Determination of certain drugs in binary mixtures formulations by second derivative ratio spectrophotometry and LC. ACTA ACUST UNITED AC 2004; 59:703-12. [PMID: 15337436 DOI: 10.1016/j.farmac.2004.03.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2003] [Accepted: 03/05/2004] [Indexed: 10/26/2022]
Abstract
Spectrophotometric and high-performance liquid chromatographic (HPLC) methods are developed for simultaneous determination of three binary mixtures with overlapping spectra. The spectrophotometric method is based on the use of second derivative of the ratio spectra (2DD) for resolution of three binary mixtures of indapamide with captopril (mixture 1), cinnarizine with heptaminol acefylline (mixture 2) and amoxycillin trihydrate with flucloxacillin sodium (mixture 3). The HPLC method depends on the separation of components of binary mixtures using ODS column with mobile phase consisting of acetonitrile and 5 mM aqueous heptane sulphonic acid sodium salt in ratios of (60:40, v/v, pH 5.5) for mixture 1, (50:50, v/v, pH 3.0) for mixture 2 and (35:65, v/v, pH 4.2) for mixture 3. The proposed methods are accurate, non-destructive and successfully applied for the determination of the three binary combinations in synthetic mixtures and commercial pharmaceutical products.
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Affiliation(s)
- Alaa El-Gindy
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt.
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28
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Abdel Razak O. Electrochemical study of hydrochlorothiazide and its determination in urine and tablets. J Pharm Biomed Anal 2004; 34:433-40. [PMID: 15013158 DOI: 10.1016/s0731-7085(03)00497-7] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2003] [Revised: 08/28/2003] [Accepted: 09/01/2003] [Indexed: 11/23/2022]
Abstract
A voltammetric study of hydrochlorothiazide (HCTZ) at glassy carbon electrode was carried out. The drug in Britton-Robinson buffer (pH 3.3) is oxidized at +1040mV, giving rise to a well-defined peak. Cyclic voltammetric study indicates that the oxidation process is irreversible and diffusion-controlled. A sensitive, simple and time-saving differential pulse anodic voltammetric procedure has been developed. The procedure has been applied for the drug determination in human urine with no prior extraction and in commercial tablets. The proposed method has been validated. The limit of detection for the standard solution was 5.0ngml(-1) and for the drug in urine was 14.0ngml(-1). The results obtained from the analysis of commercial tablets were compared statistically with those obtained from the USP 26 high-performance liquid chromatographic (HPLC) method.
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Affiliation(s)
- Omayma Abdel Razak
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, University of Alexandria, Alexandria, El-Messalah 21521, Egypt.
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Dinç E, Ustündağ O. Spectophotometric quantitative resolution of hydrochlorothiazide and spironolactone in tablets by chemometric analysis methods. ACTA ACUST UNITED AC 2003; 58:1151-61. [PMID: 14572866 DOI: 10.1016/j.farmac.2003.07.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Spectrophotometric simultaneous determination of hydrochlorothiazide and spironolactone in tablets was performed by classical least-squares (CLS), inverse least-squares (ILS), principal component regression (PCR) and partial least-squares (PLS). The methods of the chemometric analysis do not require sample pretreatment procedure. A training set of 25 standard mixture containing both drugs was prepared in the concentration range of 2-20 mug/ml according to mixture design. The multivarate calibrations were obtained by measuring the zero-order and first-derivative absorbances at 15 points from 220 to 290 nm using the training set. The validation of the multivariate methods was realised by analysing the synthetic mixtures of hydrochlorothiazide and spironolactone. The result obtained on the synthetic mixture and tablets were statistically compared by the one-way ANOVA test. The chemometrics analysis methods were satisfactorily applied to the simultaneous determination of hydrochlorothiazide and spironolactone in the pharmaceutical tablet formulation.
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Affiliation(s)
- Erdal Dinç
- Department of Analytical Chemistry, Faculty of Pharmacy, Ankara University, 06100 Tandogan, Ankara, Turkey.
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Dinç E, Baleanu D. Spectrophotometric quantitative determination of cilazapril and hydrochlorothiazide in tablets by chemometric methods. J Pharm Biomed Anal 2002; 30:715-23. [PMID: 12367697 DOI: 10.1016/s0731-7085(02)00359-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Four chemometric methods were applied to simultaneous determination of cilazapril and hydrochlorothiazide in tablets. Classical least-square (CLS), inverse least-square (ILS), principal component regression (PCR) and partial least-squares (PLS) methods do not need any priori graphical treatment of the overlapping spectra of two drugs in a mixture. For all chemometric calibrations a concentration set of the random mixture consisting of the two drugs in 0.1 M HCI and methanol (1:1) was prepared. The absorbance data in the UV-Vis spectra were measured for the 15 wavelength points (from 222 to 276 nm) in the spectral region 210-290 nm considering the intervals of deltalambda = 4 nm. The calibration of the investigated methods involves only absorbance and concentration data matrices. The developed calibrations were tested for the synthetic mixtures consisting of two drugs and using the Maple V software the chemometric calculations were performed. The results of the methods were compared each other as well as with HPLC method and a good agreement was found.
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Affiliation(s)
- Erdal Dinç
- Department of Analytical Chemistry, Faculty of Pharmacy, University of Ankara, 06100, Tandoğan, Ankara, Turkey.
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31
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Dinç E, Ustündağ O. Chemometric resolution of a mixture containing hydrochlorothiazide and amiloride by absorption and derivative spectrophotometry. J Pharm Biomed Anal 2002; 29:371-9. [PMID: 12062699 DOI: 10.1016/s0731-7085(02)00070-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Four chemometric techniques, classical least squares (CLS) and inverse least squares (ILS) and principal component regression (PCR) and partial least squares regression (PLSR) were applied to the absorption and derivative spectrophotometric determinations of amiloride and hydrochlorothiazide in a pharmaceutical preparation. Four chemometric calibrations for both zero-order and first derivative spectra were constructed by measuring the absorbance and their dA/dlambda values at 34 points in the wavelength range 205-395 nm for a training set containing 2-10 microg/ml amiloride and 4-28 microg/ml hydrochlorothiazide corresponding to 25 point mixture design. The building chemometric calibrations were confirmed by using the synthetic mixtures containing two drugs. The results obtained by the proposed techniques based on the use of the measurements at the absorption spectra and at the first derivative spectra were statistically compared with each other.
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Affiliation(s)
- Erdal Dinç
- Department of Analytical Chemistry, Faculty of Pharmacy, University of Ankara, 06100 Tandogan, Ankara, Turkey.
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32
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Ghandour MA, Kasim EA, El-Haty MT, Ahmed MM. CATHODIC STRIPPING VOLTAMMETRY OF THE ANTIHYPERTENSIVE DRUG CAPTOPRIL IN BOTH AQUEOUS AND BIOLOGICAL MEDIA. ANAL LETT 2002. [DOI: 10.1081/al-120002527] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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33
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Flow-injection chemiluminescence determination of captopril using on-line electrogenerated silver(II) as the oxidant. Microchem J 2001. [DOI: 10.1016/s0026-265x(01)00090-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Owens PK, Svensson LA, Vessman J. Direct separation of captopril diastereoisomers including their rotational isomers by RP-LC using a teicoplanin column. J Pharm Biomed Anal 2001; 25:453-64. [PMID: 11377025 DOI: 10.1016/s0731-7085(00)00591-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A direct reversed-phase liquid chromatography (LC) method has been developed for the separation and analysis of captopril and its 2R,2S diastereoisomer using a teicoplanin stationary phase. The proline containing diastereoisomers, which are known to form conformers in aqueous solution, were also separated from their rotational isomers. The influence of temperature, different organic modifiers and buffer type, concentration and pH were optimised to obtain a working resolution between the two diastereoisomers and their respective rotational isomers. The diastereoisomeric purity of several commercial captopril batches was subsequently evaluated using a 0.05% triethylammonium acetate (TEAA) buffer (pH 3.8) run at 1.0 ml/min with mobile phase reservoir and column temperature controlled at 0 degrees C. Throughout the study online UV diode array and mass spectrometry detection was carried out simultaneously to confirm that peaks eluting from the teicoplanin column were in fact captopril and not its readily converted disulphide dimer. Additionally, as a result of the greater detection sensitivity of mass spectrometry, it also facilitated a more accurate optimisation study where trace amounts of the rotational isomers were found to be present in the baseline at temperatures higher than optimum.
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Affiliation(s)
- P K Owens
- Analytical Development, AstraZeneca R&D Mölndal, S-431 83, Mölndal, Sweden.
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35
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Stefan RI, van Staden J(KF, Aboul-Enein HY. On-line assay of S-captopril using an amperometric biosensor/sequential injection system. Anal Chim Acta 2000. [DOI: 10.1016/s0003-2670(00)00780-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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36
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Stefan RI, van Staden JK, Aboul-Enein HY. Amperometric biosensors/sequential injection analysis system for simultaneous determination of S- and R-captopril. Biosens Bioelectron 2000; 15:1-5. [PMID: 10826637 DOI: 10.1016/s0956-5663(99)00075-5] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Two amperometric biosensors based on L- and D-amino acid oxidase, respectively, are proposed for the simultaneous detection of S- and R-captopril in a sequential injection analysis system (SIA). The linear concentration ranges are: 0.4-1.6 micromol/l (S-captopril) and 120-950 nmol/l (R-captopril) with detection limits of 0.2 and 15 nmol/l, respectively. The biosensors/SIA system can be used reliably on-line in synthesis process control, for the simultaneous assay of S- and R-captopril with a frequency of 34 samples/h.
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Affiliation(s)
- R I Stefan
- Department of Chemistry, University of Pretoria, South Africa
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