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Alnajjar AO, Ahmed Elbashir A, Elgorashe RE, Ebrahim AM, Idris AM, Abd El-Lateef HM. Utilization of 4-fluoro-7-nitro-2,1,3-benzoxadiazole (NBD-F) as a fluorogenic reagent for the development of a spectrofluorometric assay method for taurine in energy drinks. JOURNAL OF CHEMICAL RESEARCH 2022. [DOI: 10.1177/17475198221114760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The development of a simple, inexpensive, sensitive, and selective spectrofluorometric assay method for taurine in energy drinks utilizing 4-fluoro-7-nitro-2,1,3-benzoxadiazole as a fluorogenic agent is described. Conditions affecting the derivatization reaction are investigated and optimized. The optimal conditions are found to be as follows: buffer, pH 10; 4-fluoro-7-nitro-2,1,3-benzoxadiazoleconcentration, 0.05%; reaction time, 30 min; temperature, 50 °C. Fluorescence measurements are carried out at a wavelength of 542 nm, with excitation at a wavelength of 485 nm. The method is validated under the optimum conditions. The method is found to be linear in the range of 2.0–12.5 µg/mL, with a correlation coefficient of 0.9993. The limits of detection and quantification (µg/mL) are 0.6 and 2.02, respectively, which are appropriate for taurine assays in commercial energy drinks. In addition, the proposed method recorded excellent accuracy since the recovery values caused by presence of excipients are found to be in the range of 99.3%–102.87%. The values of relative standard deviation for intra- and inter-day precision were found to be in the ranges of 0.236%–0.659% and 2.12%–2.63%, respectively.
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Affiliation(s)
- Ahmed O Alnajjar
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa, Saudi Arabia
| | | | - Rafea Elgack Elgorashe
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa, Saudi Arabia
| | - Ammar M Ebrahim
- Consultants Unit, Research and Consulting Institute, King Faisal University, Al-Ahsa, Saudi Arabia
| | - Abubakr M Idris
- Department of Chemistry, College of Science, King Khalid University, Abha, Saudi Arabia
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha, Saudi Arabia
| | - Hany M Abd El-Lateef
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa, Saudi Arabia
- Department of Chemistry, Faculty of Science, Sohag University, Sohag, Egypt
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2
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Determination of penicillamine, tiopronin and glutathione in pharmaceutical formulations by kinetic spectrophotometry. ACTA PHARMACEUTICA (ZAGREB, CROATIA) 2021; 71:619-630. [PMID: 36651552 DOI: 10.2478/acph-2021-0038] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 10/31/2020] [Indexed: 01/19/2023]
Abstract
A novel and simple method for the determination of penicillamine (PEN), tiopronin (mercaptopropionyl glycine, MPG) and glutathione (GSH) in pharmaceutical formulations by kinetic spectrophotometry has been developed and validated. It is based on the redox reaction where the thiol compound (RSH) reduces CuII-neocuproine complex to CuI-neocuproine complex. The non-steady state signal of the formed CuI- neocuproine complex is measured at 458 nm. The initial rate and fixed time (at 1 min) methods were validated. The calibration graph was linear in the concentration range from 8.0 × 10‒7 to 8.0 × 10‒5 mol L-1 for the initial rate method and from 6.0 × 10‒7 to 6.0 × 10-5 mol L-1 for the fixed time method, with the detection limits of 2.4 × 10-7 and 1.4 × 10‒7 mol L-1, resp. Levels of PEN, MPG and GSH in pharmaceutical formulations were successfully assayed by both methods. The advantages of the presented methods include sensitivity, short analysis time, ease of application and low cost.
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3
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Fluorescent MUA-stabilized Au nanoclusters for sensitive and selective detection of penicillamine. Anal Bioanal Chem 2018; 410:2629-2636. [DOI: 10.1007/s00216-018-0936-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 01/28/2018] [Accepted: 02/01/2018] [Indexed: 01/09/2023]
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4
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Omar MA, Hammad MA, Awad M. Utility of 4-chloro-7-nitrobenzo-2-oxa-1,3-diazole for development of a highly sensitive stability indicating spectrofluorimetric method for determination of salmeterol xinafoate; application to human plasma. RSC Adv 2017. [DOI: 10.1039/c7ra08106e] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Suggested reaction mechanism between salmeterol xinafoate and NBD-Cl.
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Affiliation(s)
- Mahmoud A. Omar
- Analytical Chemistry Department
- Faculty of Pharmacy
- Minia University
- Minia
- Egypt
| | - Mohamed A. Hammad
- Analytical Chemistry Department
- Faculty of Pharmacy
- Minia University
- Minia
- Egypt
| | - Mohamed Awad
- Pharmaceutical Analytical Chemistry Department
- Faculty of Pharmacy
- Al-Azhar University
- Assiut
- Egypt
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Agarwal A, Prasad S, Naik RM. Inhibitory kinetic spectrophotometric method for the quantitative estimation of d -penicillamine at micro levels. Microchem J 2016. [DOI: 10.1016/j.microc.2016.04.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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6
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Wang P, Li BL, Li NB, Luo HQ. A fluorescence detection of D-penicillamine based on Cu(2+)-induced fluorescence quenching system of protein-stabilized gold nanoclusters. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 135:198-202. [PMID: 25064503 DOI: 10.1016/j.saa.2014.06.082] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 04/24/2014] [Accepted: 06/01/2014] [Indexed: 06/03/2023]
Abstract
In this contribution, a luminescent gold nanoclusters which were synthesized by bovine serum albumin as novel fluorescent probes were successfully utilized for the determination of D-penicillamine for the first time. Cupric ion was employed to quench the strong fluorescence of the gold nanoclusters, whereas the addition of D-penicillamine caused obvious restoration of fluorescence intensity of the Cu(2+)-gold nanoclusters system. Under optimum conditions, the increment in fluorescence intensity of Cu(2+)-gold nanoclusters system caused by D-penicillamine was linearly proportional to the concentration of D-penicillamine in the range of 2.0×10(-5)-2.39×10(-4) M. The detection limit for D-penicillamine was 5.4×10(-6) M. With the off-on fluorescence signal at 650 nm approaching the near-infrared region, the present sensor for D-penicillamine detection had high sensitivity and low spectral interference. Furthermore, the novel gold nanoclusters-based fluorescent sensor has been applied to the determination of D-penicillamine in real biological samples with satisfactory results.
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Affiliation(s)
- Peng Wang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Bang Lin Li
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Nian Bing Li
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Hong Qun Luo
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
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7
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Construction of a sensitive sensor for D-penicillamine using sodium montmorillonite nonoclay as a modifier. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2014.04.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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8
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Kinetic assay of D-Penicillamine in pure and pharmaceutical formulations based on ligand substitution reaction. Microchem J 2013. [DOI: 10.1016/j.microc.2012.07.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Raoof JB, Ojani R, Amiri-Aref M, Chekin F. Catechol as an electrochemical indicator for voltammetric determination of D-penicillamine in aqueous media at the surface of carbon paste electrode. RUSS J ELECTROCHEM+ 2012. [DOI: 10.1134/s102319351204012x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Huang Y, Zhao S, Shi M, Liang H. A microchip electrophoresis strategy with online labeling and chemiluminescence detection for simultaneous quantification of thiol drugs. J Pharm Biomed Anal 2011; 55:889-94. [DOI: 10.1016/j.jpba.2011.03.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Revised: 03/02/2011] [Accepted: 03/03/2011] [Indexed: 11/24/2022]
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11
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Raoof JB, Ojani R, Majidian M, Chekin F. Voltammetric determination of D-penicillamine based on its homogeneous electrocatalytic oxidation with potassium iodide at the surface of glassy carbon electrode. RUSS J ELECTROCHEM+ 2011. [DOI: 10.1134/s1023193510120098] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Abstract
AbstractTwo simple, sensitive and specific fluorimetric methods have been developed for the determination of Penicillamine (PNC), a sulphur containing compound. Method (I) involves the reaction of PNC with 2′,7′-bis(acetoxymercuri)-fluorescein (AMF) in the presence of Kolthoff’s buffer, pH 8.2, with subsequent measurement of fluorescence spectra at 520 nm (λEx 497 nm). Method (II) is based on PNC being oxidized into penicillaminic acid using Cerium (IV) in an acidic medium. Method sensitivity has been improved using sodium triphosphate which enhances the luminescence intensity of Ce(III). Fluorescence spectra were then measured at 348 nm (λEx 293 nm). The reaction conditions and the fluorescence spectral properties have been investigated for both methods. Under the described conditions, the proposed methods were applicable over the concentration ranges 0.0048 − 0.0288 µg mL−1 and 0.096 − 0.288 µg mL−1 with mean percentage recoveries 99.95 ± 1.29 and 100.04 ± 1.10 for methods I and II, respectively. The proposed methods were validated in terms of accuracy, precision, LOD and LOQ and robustness and then were successfully applied to the determination of PNC in bulk powder and in capsules as well as in the presence of the related disulphide. The results obtained were determined to be in good agreement with those obtained using a previously reported method.
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Raoof JB, Ojani R, Chekin F. Voltammetric sensor for D-penicillamine determination based on its electrocatalytic oxidation at the surface of ferrocenes modified carbon paste electrodes. J CHEM SCI 2009. [DOI: 10.1007/s12039-009-0123-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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14
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Homogeneous electrocatalytic oxidation of d-penicillamine with ferrocyanide at a carbon paste electrode: application to voltammetric determination. J APPL ELECTROCHEM 2008. [DOI: 10.1007/s10800-008-9724-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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A Spectrofluorimetric Sequential Injection Method for the Determination of Penicillamine Using Fluorescamine in the Presence of β-cyclodextrins. J Fluoresc 2008; 18:1131-8. [DOI: 10.1007/s10895-008-0363-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2008] [Accepted: 03/10/2008] [Indexed: 10/22/2022]
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16
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Suliman FEO, Al-Hinai MM, Al-Kindy SM, Salama SB. Enhancement of the chemiluminescence of penicillamine and ephedrine after derivatization with aldehydes using tris(bipyridyl)ruthenium(II) peroxydisulfate system and its analytical application. Talanta 2008; 74:1256-64. [DOI: 10.1016/j.talanta.2007.08.040] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2007] [Revised: 08/27/2007] [Accepted: 08/29/2007] [Indexed: 11/26/2022]
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17
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Li N, Kwak J. A Penicillamine Biosensor Based on Tyrosinase Immobilized on Nano-Au/ PAMAM Dendrimer Modified Gold Electrode. ELECTROANAL 2007. [DOI: 10.1002/elan.200703968] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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18
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Yang X, Yuan H, Wang C, Su X, Hu L, Xiao D. Determination of penicillamine in pharmaceuticals and human plasma by capillary electrophoresis with in-column fiber optics light-emitting diode induced fluorescence detection. J Pharm Biomed Anal 2007; 45:362-6. [PMID: 17606355 DOI: 10.1016/j.jpba.2007.05.017] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2007] [Revised: 04/18/2007] [Accepted: 05/20/2007] [Indexed: 10/23/2022]
Abstract
In this paper, a capillary electrophoresis (CE) system with in-column fiber optics light-emitting diode (LED) induced fluorescence detection was developed for the determination of penicillamine (PA). The influence of buffer concentration, buffer pH, applied voltage and injection time was systematically investigated. Optimum separation conditions were obtained with 10 mM borate buffer at pH 9.1, applied voltage 20 kV and 8 s hydrodynamic injection at 30 mbar. The detection system displayed linear dynamic range from 3.2 x 10(-7) to 4.8 x 10(-5) mol L(-1) with a correlation coefficient of 0.9991 and good repeatability (R.S.D.=2.46%). The method was applied to the determination of PA in commercial tablets and human plasma, which the recoveries of standard PA added to tablets and human plasma sample were found to be in the range of 96.26-102.68 and 91.10-99.35%, respectively. The proposed method is cheap, rapid, easy, and accurate, and can be successfully applied to the formulation analysis and bioanalysis.
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Affiliation(s)
- Xiupei Yang
- College of Chemistry and College of Chemical Engineering, Sichuan University, Chengdu 610065, PR China
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19
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Raoof JB, Ojani R, Chekin F. Electrochemical Analysis ofD-Penicillamine Using a Carbon Paste Electrode Modified with Ferrocene Carboxylic Acid. ELECTROANAL 2007. [DOI: 10.1002/elan.200703947] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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Torriero AAJ, Salinas E, Marchevsky EJ, Raba J, Silber JJ. Penicillamine determination using a tyrosinase micro-rotating biosensor. Anal Chim Acta 2006; 580:136-42. [PMID: 17723765 DOI: 10.1016/j.aca.2006.07.067] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2006] [Revised: 07/25/2006] [Accepted: 07/26/2006] [Indexed: 11/29/2022]
Abstract
Tyrosinase [EC 1.14.18.1], immobilized on a rotating disk, catalyzed the oxidation of catechols to o-benzoquinone, whose back electrochemical reduction was detected on glassy carbon electrode surface at -150mV versus Ag/AgCl/NaCl 3M. Thus, when penicillamine (PA) was added to the solution, this thiol-containing compound participate in Michael type addition reactions with o-benzoquinone to form the corresponding thioquinone derivatives, decreasing the reduction current obtained proportionally to the increase of its concentration. This method could be used for sensitive determination of PA in drug and human synthetic serum samples. A linear range of 0.02-80 microM (r=0.999) was obtained for amperometric determination of PA in buffered pH 7.0 solutions (0.1 M phosphate buffer). The biosensor has a reasonable reproducibility (R.S.D.<4.0%) and a very stable amperometric response toward this compound (more than 1 month).
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Affiliation(s)
- Angel A J Torriero
- Departamento de Química, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Chacabuco y Pedernera 5700, San Luis, Argentina.
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21
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Wang W, Rusin O, Xu X, Kim KK, Escobedo JO, Fakayode SO, Fletcher KA, Lowry M, Schowalter CM, Lawrence CM, Fronczek FR, Warner IM, Strongin RM. Detection of homocysteine and cysteine. J Am Chem Soc 2006; 127:15949-58. [PMID: 16277539 PMCID: PMC3386615 DOI: 10.1021/ja054962n] [Citation(s) in RCA: 437] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
At elevated levels, homocysteine (Hcy, 1) is a risk factor for cardiovascular diseases, Alzheimer's disease, neural tube defects, and osteoporosis. Both 1 and cysteine (Cys, 3) are linked to neurotoxicity. The biochemical mechanisms by which 1 and 3 are involved in disease states are relatively unclear. Herein, we describe simple methods for detecting either Hcy or Cys in the visible spectral region with the highest selectivity reported to date without using biochemical techniques or preparative separations. Simple methods and readily available reagents allow for the detection of Cys and Hcy in the range of their physiologically relevant levels. New HPLC postcolumn detection methods for biological thiols are reported. The potential biomedical relevance of the chemical mechanisms involved in the detection of 1 is described.
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Al-Majed A, Belal F, Julkhuf S. Penicillamine: analytical profile. PROFILES OF DRUG SUBSTANCES, EXCIPIENTS, AND RELATED METHODOLOGY 2006; 32:131-148. [PMID: 22469085 DOI: 10.1016/s0099-5428(05)32005-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Affiliation(s)
- Abdulrahman Al-Majed
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
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Al-Majed A, Belal F, Julkhuf S. Penicillamine: adsorption, distribution, metabolism, and elimination profile. PROFILES OF DRUG SUBSTANCES, EXCIPIENTS, AND RELATED METHODOLOGY 2006; 32:149-152. [PMID: 22469086 DOI: 10.1016/s0099-5428(05)32006-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Affiliation(s)
- Abdulrahman Al-Majed
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457; Riyadh 11451, Saudi Arabia
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Walash MI, El-Brashy AM, Metwally MES, Abdelal AA. Spectrophotometric determination of penicillamine and carbocisteine based on formation of metal complexes. ACTA ACUST UNITED AC 2004; 59:493-503. [PMID: 15178313 DOI: 10.1016/j.farmac.2003.11.016] [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] [Received: 07/14/2003] [Accepted: 11/08/2003] [Indexed: 11/20/2022]
Abstract
A simple spectrophotometric method was developed for the determination of penicillamine and carbocisteine. The method depends on complexation of penicillamine with Ni, Co and Pb ions in acetate buffer pH of 6.3, 6.5 and 5.3, respectively, and carbocisteine with Cu and Ni ions in borate buffer pH of 6.7; 1-70 microg/ml of these drugs could be determined by measuring the absorbance of each complex at its specific lambdamax. The results obtained are in good agreement with those obtained using the official methods. The proposed method was successfully applied for the determination of these compounds in their dosage forms. Also, the molar ratio and stability constant of the metal complexes were calculated and a proposal of the reaction pathway was postulated.
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Affiliation(s)
- M I Walash
- Department of Analytical Chemistry, Faculty of Pharmacy, University of Mansoura, Mansoura 35516, Egypt.
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25
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Spectrophotometric and Kinetic Determination of Some Sulphur Containing Drugs in Bulk and Drug Formulations. B KOREAN CHEM SOC 2004. [DOI: 10.5012/bkcs.2004.25.4.517] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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26
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Walash MI, Metwally MES, El-Brashy AM, Abdelal AA. Kinetic spectrophotometric determination of some sulfur containing compounds in pharmaceutical preparations and human serum. ACTA ACUST UNITED AC 2003; 58:1325-32. [PMID: 14630247 DOI: 10.1016/s0014-827x(03)00167-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A kinetic spectrophotometric method was developed for the determination of carbocisteine, ethionamide, thioctic acid and penicillamine based on the catalytic effect on the reaction between sodium azide and iodine in aqueous solution. Ten to 100 microg ml(-1) of carbocisteine and ethionamide, 0.1-1 microg ml(-1) of thioctic acid and 0.01-0.1 microg ml(-1) of penicillamine could be determined, respectively, by measuring the decrease in the absorbance of iodine at 348 nm by a fixed time method. The decrease in the absorbance in the first 5 min from the initiation of the reaction is related to the concentration of the drugs. The detection limits were 0.47, 0.71, 0.018 and 9.38 x 10(-4) microg ml(-1) for the four drugs, respectively. The proposed procedure was successfully applied in the determination of these drugs in pharmaceutical preparations and human serum.
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Affiliation(s)
- M I Walash
- Analytical Chemistry Department, Faculty of Pharmacy, Mansoura University, 35516 Mansoura, Egypt.
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27
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Al-Ghannam SM, El-Brashy AM, Al-Farhan BS. Fluorimetric determination of some thiol compounds in their dosage forms. FARMACO (SOCIETA CHIMICA ITALIANA : 1989) 2002; 57:625-9. [PMID: 12361229 DOI: 10.1016/s0014-827x(02)01223-5] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
A simple fluorimetric procedure was adopted for determination of three pharmaceutical compounds containing thiol groups namely, captopril, D-penicillamine and N-acetylcysteine. In this method, the drugs are treated with 1,2-naphthoquinone-4-sulfonic acid. The latter is reduced to 1,2-dihydroxynaphthalene-4-sulfonic acid which has a maximum fluorescence intensity at 480/318 nm (lambdaEm/Ex). The method is sensitive to 0.5-4.5 pg ml(- 1) with minimum detectability 0.05 microg ml(-1) (S/N = 2), and has been applied to determine these three thiols in their dosage forms. The results obtained are compared favourably with those obtained by their pharmacopeial methods.
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Affiliation(s)
- Sh M Al-Ghannam
- Department of Chemistry, Girl's College of Science, Dammam, Saudi Arabia.
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Uchiyama S, Santa T, Okiyama N, Fukushima T, Imai K. Fluorogenic and fluorescent labeling reagents with a benzofurazan skeleton. Biomed Chromatogr 2001; 15:295-318. [PMID: 11507712 DOI: 10.1002/bmc.75] [Citation(s) in RCA: 119] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Fluorogenic and fluorescent labeling reagents having a benzofurazan (2,1,3-benzoxadiazole) skeleton such as 4-fluoro-7-nitro-2,1,3-benzoxadiazole (NBD-F), 4-N,N-dimethylaminosulfonyl-7-fluoro-2,1,3-benzoxadiazole (DBD-F), 4-aminosulfonyl-7-fluoro-2,1,3-benzoxadiazole (ABD-F), ammonium 7-fluoro-2,1,3-benzoxadiazole-4-sulfonate (SBD-F), 4-hydrazino-7-nitro-2,1,3-benzoxadiazole (NBD-H), 4-N,N-dimethylaminosulfonyl-7-hydrazino-2,1,3-benzoxadiazole (DBD-H), 4-nitro-7-N-piperazino-2,1,3-benzoxadiazole (NBD-PZ), 4-N,N-dimethylaminosulfonyl-7-N-piperazino-2,1,3-benzoxadiazole (DBD-PZ), 4-(N-chloroformylmethyl-N-methyl)amino-7-N,N-dimethylaminosulfonyl-2,1,3-benzoxadiazole (DBD-COCl) and 7-N,N-dimethylaminosulfonyl-4-(2,1,3-benzoxadiazolyl) isothiocyanate (DBD-NCS) are reviewed in terms of synthetic method, reactivity, fluorescence characteristics, sensitivity and application to analytes.
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Affiliation(s)
- S Uchiyama
- Laboratory of Bio-Analytical Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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