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Derayea SM, Badr El-Din KM, Mohammed FF. An innovative validated spectrofluorimetric method for determination of Lisinopril in presence of hydrochlorothiazide; application to content uniformity testing. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 188:318-323. [PMID: 28750308 DOI: 10.1016/j.saa.2017.07.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 07/11/2017] [Accepted: 07/16/2017] [Indexed: 06/07/2023]
Abstract
A new sensitive and discriminating spectrofluorimetric method has been developed and validated for determination of Lisinopril, one of the angiotensin converting enzyme inhibitors, in its pure bulk form and pharmaceutical tablets. The reaction of Lisinopril with ethylacetoacetate and formaldehyde in acidic buffered medium (pH3.8) has yielded a pale yellow product that exhibited a high fluorescence measured at 438nm after excitation at 350nm. All the experimental parameters affecting the formation and stability of the produced fluorophore were carefully investigated and optimized to give the maximum sensitivity. The fluorescence intensity was directly proportional to the drug concentration in the range of 0.5-4.5μg/mL with a limit of detection equal to 0.16μg/mL. The method was successfully applied in the analysis of the commercially available pharmaceutical tablets containing the single drug or its binary mixtures with Hydrochlorothiazide. Furthermore, the developed procedure was adapted for studying the content uniformity test of some dosage forms containing the cited drug.
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Affiliation(s)
- Sayed M Derayea
- Analytical Chemistry Department, Faculty of Pharmacy, Minia University, Minia, Egypt
| | - Khalid M Badr El-Din
- Analytical Chemistry Department, Faculty of Pharmacy, Minia University, Minia, Egypt.
| | - Fatma F Mohammed
- Analytical Chemistry Department, Faculty of Pharmacy, Minia University, Minia, Egypt
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2
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Mohammed FF, Badr El-Din K, Derayea, SM. Switch on fluorescence probe for the selective determination of lisinopril in pharmaceutical formulations: application to content uniformity testing. RSC Adv 2018; 8:16269-16277. [PMID: 35542212 PMCID: PMC9080241 DOI: 10.1039/c8ra01617h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 04/25/2018] [Indexed: 11/21/2022] Open
Abstract
Lisinopril, an ACE inhibitor, was selectively determined in pharmaceutical products through switch on the fluorescence of fluorescamine.
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Affiliation(s)
- Fatma F. Mohammed
- Analytical Chemistry Department
- Faculty of Pharmacy
- Minia University
- Minia
- Egypt
| | | | - Sayed M. Derayea,
- Analytical Chemistry Department
- Faculty of Pharmacy
- Minia University
- Minia
- Egypt
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3
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Concurrent determination of Metformin and some ACE inhibitors: Its application to Pharmacokinetics. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2013.11.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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4
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Hasanzadeh M, Pournaghi-Azar MH, Shadjou N, Jouyban A. Determination of lisinopril using β-cyclodextrin/graphene oxide-SO3H modified glassy carbon electrode. J APPL ELECTROCHEM 2014. [DOI: 10.1007/s10800-014-0689-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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5
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Raza A, Ansari TM, Atta-ur-Rehman. Spectrophotometric Determination of Lisinopril in Pure and Pharmaceutical Formulations. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200500149] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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6
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Simultaneous determination of metformin, captopril, lisinopril, and enalapril by RP-HPLC: its applications in dosage formulations and in human serum. Med Chem Res 2013. [DOI: 10.1007/s00044-013-0501-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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7
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Determination of lisinopril using anion exchange chromatography with integrated pulsed amperometric detection. CHINESE CHEM LETT 2012. [DOI: 10.1016/j.cclet.2011.11.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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8
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Naveed S, Sultana N, Saeed Arayne M. Simultaneous determination of lisinopril and H2 antagonists in API, formulations and human serum by using two different HPLC systems. Med Chem Res 2011. [DOI: 10.1007/s00044-011-9939-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Quantitative determination of lisinopril in human plasma by high performance liquid chromatography-tandem mass spectrometry and its application in a pharmacokinetic study. Biomed Chromatogr 2011; 26:691-6. [DOI: 10.1002/bmc.1715] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Accepted: 08/14/2011] [Indexed: 11/07/2022]
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10
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Zhu PX, Wang DH, Sun CR, Shen ZQ. Characterization of impurities in the bulk drug lisinopril by liquid chromatography/ion trap spectrometry. J Zhejiang Univ Sci B 2008; 9:385-90. [PMID: 18500778 DOI: 10.1631/jzus.b0820031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Two trace impurities in the bulk drug lisinopril were detected by means of high-performance liquid chromatography coupled with mass spectrometry (HPLC/MS) with a simple and sensitive method suitable for HPLC/MSn analysis. The fragmentation behavior of lisinopril and the impurities was investigated, and two unknown impurities were elucidated as 2-(6-amino-1-(1-carboxyethylamino)-1-oxohexan-2-ylamino)-4-phenylbutanoic acid and 6-amino-2-(1-carboxy-3-phenylpro-pylamino)-hexanoic acid on the basis of the multi-stage mass spectrometry and exact mass evidence. The proposed structures of the two unknown impurities were further confirmed by nuclear magnetic resonance (NMR) experiments after preparative isolation.
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Affiliation(s)
- Pei-xi Zhu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
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11
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Qin W, Zhang Z, Tian Y, Xu F, Wang N, Chen Y. Rapid quantification of lisinopril in human plasma by liquid chromatography/tandem mass spectrometry. Biomed Chromatogr 2007; 21:415-21. [PMID: 17221934 DOI: 10.1002/bmc.774] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
An assay based on protein precipitation and liquid chromatography/tandem mass spectrometry (LC-MS/MS) has been developed and validated for the quantitative analysis of lisinopril in human plasma. After the addition of enalaprilat as internal standard (IS), plasma samples were prepared by one-step protein precipitation using perchloric acid followed by an isocratic elution with 10 mm ammonium acetate buffer (pH adjusted to 5.0 with acetic acid)-methanol (70:30, v/v) on a Phenomenex Luna 5 mu C(18) (2) column. Detection was performed on a triple-quadrupole mass spectrometer utilizing an electrospray ionization (ESI) interface operating in positive ion and selected reaction monitoring (SRM) mode with the precursor to product ion transitions m/z 406 --> 246 for lisinopril and m/z 349 --> 206 for enalaprilat. Calibration curves of lisinopril in human plasma were linear (r = 0.9973-0.9998) over the concentration range 2-200 ng/mL with acceptable accuracy and precision. The limit of detection and lower limit of quantification in human plasma were 1 and 2 ng/mL, respectively. The validated LC-MS/MS method has been successfully applied to a preliminary pharmacokinetic study of lisinopril in Chinese healthy male volunteers.
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Affiliation(s)
- Weiwei Qin
- Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, Nanjing 210009, People's Republic of China
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12
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Development of a rapid liquid chromatography tandem mass spectrometry method for the determination of lisinopril, applicable for a bioequivalence study, employing a 96-well format solid phase extraction protocol. Anal Chim Acta 2005. [DOI: 10.1016/j.aca.2005.07.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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13
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Rahman N, Anwar N, Kashif M. Application of π-acceptors to the spectrophotometric determination of lisinopril in commercial dosage forms. ACTA ACUST UNITED AC 2005; 60:605-11. [PMID: 15932756 DOI: 10.1016/j.farmac.2005.04.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2004] [Revised: 04/04/2005] [Accepted: 04/30/2005] [Indexed: 11/29/2022]
Abstract
Two simple, rapid and sensitive spectrophotometric methods have been proposed for the determination of lisinopril in pure form and pharmaceutical formulations. The methods are based on the charge transfer complexation reaction of the drug with 7,7,8,8,tetracyanoquinodimethane (TCNQ) and p-chloranilic acid (pCA) in polar media. The lisinopril-TCNQ and lisinopril-pCA charge transfer complexes dissociate in acetone and methanol, respectively, and yield coloured TCNQ and pCA radical anions which are measured spectrophotometrically at 743 and 525 nm. Under optimised experimental conditions, Beer's law is obeyed in the concentration range of 2-26 and 25-300 microg ml-1 with molar absorptivity of 1.432x10(4) and 1.192x10(4) l mol-1 cm-1 for TCNQ and pCA methods, respectively. Both the methods have been applied to the determination of lisinopril in pharmaceutical dosage forms. Results of analysis are validated statistically.
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Affiliation(s)
- Nafisur Rahman
- Department of Chemistry, Analytical Research Laboratory, Aligarh Muslim University, Aligarh, UP 202 002, India.
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14
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Padua AAF, Barrientos-Astigarraga RE, Rezende VM, Mendes GD, De Nucci G. Lisinopril quantification in human plasma by liquid chromatography–electrospray tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2004; 809:211-6. [PMID: 15315767 DOI: 10.1016/j.jchromb.2004.06.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2003] [Revised: 03/22/2004] [Accepted: 06/14/2004] [Indexed: 11/23/2022]
Abstract
An analytical method based on liquid chromatography with positive ion electrospray ionization (ESI) coupled to tandem mass spectrometry detection was developed for the determination of Lisinopril in human plasma using Enalaprilat as internal standard. The analyte and internal standard were extracted from the plasma samples by solid-phase extraction using Waters HLB Oasis SPE cartridges and chromatographed on a C8 analytical column. The mobile phase consisted of acetonitrile/water (60:40, v/v) + 20 mM acetic acid + 4.3 mM of triethylamine. The method had a chromatographic total run-time of 6.5 min and was linear within the range 2.00-200 ng/ml. Detection was carried out on a Micromass triple quadrupole tandem mass spectrometer by multiple reaction monitoring (MRM). The precision (CV%) and accuracy, calculated from limit of quantification (LOQ) samples (n = 8), were 8.9 and 98.9%, respectively. The method herein described was employed in a bioequivalence study of two tablet formulations of Lisinopril 20mg.
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Affiliation(s)
- Ana A F Padua
- Department of Pharmacology, State University of Campinas, P.O. Box 6111, Campinas SP, Brazil
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15
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Sagirli O, Ersoy L. An HPLC method for the determination of lisinopril in human plasma and urine with fluorescence detection. J Chromatogr B Analyt Technol Biomed Life Sci 2004; 809:159-65. [PMID: 15282107 DOI: 10.1016/j.jchromb.2004.06.014] [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: 05/07/2004] [Revised: 06/07/2004] [Accepted: 06/11/2004] [Indexed: 11/16/2022]
Abstract
A selective, sensitive and precise HPLC method with fluorimetric detection has been developed for the assay of lisinopril in human plasma and urine. The clean up of the sample was carried out by solid-phase extraction, firstly with C18-cartridge and secondly with a silica-cartridge. After a pre-column derivatization with fluorescamine, the reaction mixture was chromatographed on C18-column with gradient elution, using methanol and 0.02 M phosphate buffer (pH=3.2). The fluorescamine-lisinopril derivative was detected fluorimetrically by monitoring the emission at 477 nm, with excitation at 383 nm. Linear quantitative response curve was generated over a concentration range of 5-200 ng/ml and 25-1000 ng/ml for plasma and urine samples, respectively. The mean recovery of lisinopril from plasma and urine was 63.41 and 74.08%, respectively. Intra-day and inter-day R.S.D. and R.M.E. values at three different concentrations were assessed. The method was applied for pharmacokinetic study in a healthy volunteer after a single oral dose of 20 mg of the drug.
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Affiliation(s)
- Olcay Sagirli
- Istanbul University, Faculty of Pharmacy, Department of Analytical Chemistry, Beyazit, 34116 Istanbul, Turkey.
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16
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Emara S, El-Gindy A, El-Shorbagi AN, Hadad G. Utility of copper(II) oxide as a packed reactor in flow injection assembly for rapid analysis of some angiotensin converting enzyme inhibitors. Anal Chim Acta 2003. [DOI: 10.1016/s0003-2670(03)00712-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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17
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Abdel Razak O, Belal SF, Bedair MM, Barakat NS, Haggag RS. Spectrophotometric and polarographic determination of enalapril and lisinopril using 2,4-dinitrofluorobenzene. J Pharm Biomed Anal 2003; 31:701-11. [PMID: 12644197 DOI: 10.1016/s0731-7085(02)00654-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The reaction of enalapril maleate and lisinopril with 2,4-dinitrofluorobenzene has been used to form colored products and polarographically active derivatives. The different experimental conditions have been optimized. The proposed methods have been validated and applied to the determination of both drugs in their commercial tablets. The results have been statistically compared with those obtained using the official HPLC methods.
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Affiliation(s)
- O Abdel Razak
- Faculty of Pharmacy, Pharmaceutical Analytical Chemistry Department, University of Alexandria, P.O. Box El Mesallah, 21521, Alexandria, Egypt.
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18
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Aktas ES, Ersoy L, Sagirli O. A new spectrofluorimetric method for the determination of lisinopril in tablets. FARMACO (SOCIETA CHIMICA ITALIANA : 1989) 2003; 58:165-8. [PMID: 12581783 DOI: 10.1016/s0014-827x(02)00013-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
An accurate and precise spectrofluorimetric method is presented for the determination of lisinopril based on the formation of a derivative formed with 7-chloro-4-nitrobenzofurazan. The derivatization reaction proceeds quantitatively at pH 8.5-9.0 and 60 degrees C in 70 min when the molar ratio of reagent to the drug is 170. After the extraction with ethyl acetate the fluorescence intensity of the derivative was measured at 528 nm with excitation at 465 nm. Calibration graph is rectilinear over the range of 50-1000 ng/ml with detection and determination limits of 20 and 50 ng/ml, respectively. The regression equation is I(f) = 0.198C-0.299 (r = 0.9999). The method was applied to the commercially available tablets and the results were statistically compared with those obtained by official HPLC method.
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Affiliation(s)
- Esra S Aktas
- Department of Analytical Chemistry, Faculty of Pharmacy, Istanbul University, Beyazit 34452, Istanbul, Turkey
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19
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Tsakalof A, Bairachtari K, Georgarakis M. Development of a liquid chromatography-mass spectrometry method for monitoring the angiotensin-converting enzyme inhibitor lisinopril in serum. J Chromatogr B Analyt Technol Biomed Life Sci 2003; 783:425-32. [PMID: 12482485 DOI: 10.1016/s1570-0232(02)00704-3] [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
In this study, a sensitive, specific, precise and accurate method for lisonopril quantitative determination in human serum was developed and validated. The method comprises lisinopril isolation from serum by means of solid-phase extraction followed by its quantification by liquid chromatography-mass spectrometry. Chromatographic separation was performed at 55 degrees C on Kromasil C(18) 5 micrometer 250x3.2 mm HPLC column with mobile phase composed of 50 mM ammonium formate buffer (pH 3)-acetonirile-methanol (72:7:21, v/v/v). A Finnigan AQA benchtop mass spectrometer with a pneumatically assisted electrospray (ES) interface and a single quadrupole mass filter was used to detect and quantify lisinopril in column effluent. Ion signals were acquired by selected ion monitoring of the protonated lisinopril ion m/z=406.5 (M+1). The detector response was linear with r>0.9993 in the investigated concentration range 6-150 ng/ml. The mean recovery of lisinopril from serum samples was 88%. The limit of quantitation for lisinopril was 6 ng/ml with a signal-to-noise ratio at this concentration level S/N=34.75+/-3.9 (n=4).
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Affiliation(s)
- Andreas Tsakalof
- "Ormylia" Art Diagnosis Center, Chromatography Department, Sacred Convent of Annunciation, 63071, Ormylia, Greece.
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Bouabdallah S, Trabelsi H, Bouzouita K, Sabbah S. Reversed-phase liquid chromatography of lisinopril conformers. JOURNAL OF BIOCHEMICAL AND BIOPHYSICAL METHODS 2002; 54:391-405. [PMID: 12543514 DOI: 10.1016/s0165-022x(02)00140-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The effect of flow rate, temperature, pH, organic solvent and counter ion on peak shape and separation of the cis and trans conformers of lisinopril are investigated by HPLC. It was demonstrated that complete separation of the two isomers can be achieved at low temperature at either neutral or low pH together with appropriate type and concentration of organic solvent, whereas the elution of lisinopril as a single peak is favored by a decrease of flow rate, elevated temperature, choice of organic solvent (type and amount) and the use of an appropriate counter ion concentration.
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Affiliation(s)
- S Bouabdallah
- Laboratoire National de Contrôle des Médicaments 11 bis, rue jebel Lakhdar, Bab Saadoun, 1006 Tunis, Tunisia
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El-Gindy A, Ashour A, Abdel-Fattah L, Shabana MM. Spectrophotometric, septrofluorimetric and LC determination of lisinopril. J Pharm Biomed Anal 2001; 25:913-22. [PMID: 11377074 DOI: 10.1016/s0731-7085(01)00376-4] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Three methods are described for the determination of lisinopril in the pharmaceutical tablets. The spectrophotometric method depends on the reaction of the lisinopril with sodium hypochlorite and phenyl hydrazine to form a condensation product measured at 362 nm. The spectrophotometric method was extended to develop a stability indicating method. The spectrofluorimetric method depends on reaction of the lisinopril with o-phthalaldehyde in the presence of 2-mercaptoethanol in borate buffer pH 9.5. The fluorescence of the reaction product was measured upon excitation at a maximum of 340 nm with emission wavelength at 455 nm. The HPLC method depends on using Hypersil silica column with a mobile phase consisting of methanol-water-triethylamine (50:50:0.1 v/v) and the pH was adjusted to 2.6 with 0.1 N perchloric acid. Quantitation was achieved with UV detection at 210 nm based on peak area.
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Affiliation(s)
- A El-Gindy
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Suez Canal University, 41522, Ismailia, Egypt.
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Prieto JA, Jiménez RM, Alonso RM, Ortiz E. Determination of the antihypertensive drug cilazapril and its active metabolite cilazaprilat in pharmaceuticals and urine by solid-phase extraction and high-performance liquid chromatography with photometric detection. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 2001; 754:23-34. [PMID: 11318420 DOI: 10.1016/s0378-4347(00)00580-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
A liquid chromatographic method with photometric detection for the determination of cilazapril and its active metabolite and degradation product cilazaprilat in urine and pharmaceuticals has been developed. The chromatographic method consisted of a microBondapak C18 column maintained at 30+/-0.2 degrees C, using a mixture of methanol-10 mM phosphoric acid (50:50 v/v) as mobile phase at a flow-rate of 1.0 ml/min. Enalapril maleate was used as internal standard. The detection was performed at a wavelength of 206 nm. A study of the retention of cilazapril and cilazaprilat using solid-liquid extraction has been carried out in order to optimise the clean-up procedure for urine samples, which consisted of a solid-liquid extraction using C(R) cartridges. Recoveries greater than 85% are obtained for both compounds. The method was sensitive, precise and accurate enough to be applied to the determination of urine samples obtained from three hypertensive patients up to 24 h after intake of a therapeutic dose (detection limit of 70 ng/ml for cilazapril and cilazaprilat in urine). A comparison of the method developed using photometric and amperometric detection has been carried out.
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Affiliation(s)
- J A Prieto
- Departamento de Química Analítica, Facultad de Ciencias, Universidad del País Vasco, Bilbao, Spain
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El-Yazbi FA, Abdine HH, Shaalan RA. Spectrophotometric and spectrofluorometric methods for the assay of lisinopril in single and multicomponent pharmaceutical dosage forms. J Pharm Biomed Anal 1999; 19:819-27. [PMID: 10698547 DOI: 10.1016/s0731-7085(98)00110-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Simple and sensitive methods are described for the assay of lisinopril in tablets. The first method (A) is based on the reaction of the drug with chloranil in aqueous solution of pH 9.5 to give yellow colour measured at 346 nm. The second method (B) is based upon the interaction of lisinopril with dichlone resulting in the formation of an intense purple colour measured at 580 nm. The third method (C) depends on the reaction of the drug with acetylacetone and formaldehyde to form a coloured condensation product measured at 356 nm and also has a strong fluorescence at 475 nm (lambda(ex) 410 nm). This method is extended to determine lisinopril in binary mixtures with hydrochlorothiazide. The last method (D) depends on measuring the first and second derivative spectra of lisinopril. Moreover, the derivative method is used as stability-indicating method where lisinopril can be determined in presence of its degradation products. The proposed methods proved to be suitable for a rapid quality control of commercial dosage forms. The results obtained were precise and accurate.
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Affiliation(s)
- F A El-Yazbi
- Faculty of Pharmacy, Alexandria University, El-Mesallah, Egypt
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Maurer HH, Kraemer T, Arlt JW. Screening for the detection of angiotensin-converting enzyme inhibitors, their metabolites, and AT II receptor antagonists. Ther Drug Monit 1998; 20:706-13. [PMID: 9853992 DOI: 10.1097/00007691-199812000-00022] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
A gas chromatography-mass spectrometry (GC-MS) screening procedure was developed for the detection of angiotensin-converting enzyme (ACE) inhibitors, their metabolites, and angiotensin (AT) II receptor antagonists in urine as part of a systematic toxicologic analysis procedure for acidic drugs and poisons after extractive methylation. The part of the phase-transfer catalyst remaining in the organic phase was removed by solid phase extraction on a diol phase. The compounds were separated by capillary GC and identified by computerized MS in the full scan mode. Using mass chromatography with the ions m/z 157, 160, 172, 192, 204, 220, 234, 248, 249, and 262, the possible presence of ACE inhibitors, their metabolites, and AT II antagonists could be indicated. The identity of positive signals in such mass chromatograms was confirmed by comparison of the peaks underlying full mass spectra with the reference spectra recorded during this study. This method allowed detection of therapeutic concentrations of ACE inhibitors (benazepril, enalapril, perindopril, quinapril, ramipril, trandolapril, their metabolites, or both) and therapeutic concentrations of the AT II antagonist, valsartan, in human urine samples. Human urine samples were not available for testing cilazapril, moexipril, and losartan; they were detected only in rat urine. The overall recoveries of ACE inhibitors ranged between 80% and 88%, with a coefficient of variation (CV) of less than 10% and the limit of detection of at least 10 ng/ml (signal to noise ratio 3) in the full-scan mode. The overall recovery of the valsartan was 68%, with a CV of less than 10%; the limit of detection was at least 10 ng/ml (S/N 3) in the full scan mode.
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Affiliation(s)
- H H Maurer
- Department of Toxicology, Institute of Pharmacology and Toxicology, University of Saarland, Homburg (Saar), Germany
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