51
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Wu Y, Feng X, Zhou S, Shi H, Wu H, Zhao S, Song W. Sensing epinephrine with an ITO electrode modified with an imprinted chitosan film containing multi-walled carbon nanotubes and a polymerized ionic liquid. Mikrochim Acta 2013. [DOI: 10.1007/s00604-013-1063-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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52
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Prasad BB, Prasad A, Tiwari MP, Madhuri R. Multiwalled carbon nanotubes bearing ‘terminal monomeric unit’ for the fabrication of epinephrine imprinted polymer-based electrochemical sensor. Biosens Bioelectron 2013; 45:114-22. [DOI: 10.1016/j.bios.2013.01.042] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Revised: 01/17/2013] [Accepted: 01/22/2013] [Indexed: 01/12/2023]
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53
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Amperometric sensing of norepinephrine at picomolar concentrations using screen printed, high surface area mesoporous carbon. Anal Chim Acta 2013; 788:32-8. [DOI: 10.1016/j.aca.2013.06.019] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2013] [Revised: 06/06/2013] [Accepted: 06/16/2013] [Indexed: 11/21/2022]
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54
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Ghica ME, Brett CMA. Simple and Efficient Epinephrine Sensor Based on Carbon Nanotube Modified Carbon Film Electrodes. ANAL LETT 2013. [DOI: 10.1080/00032719.2012.762584] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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55
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Simultaneous determination of ascorbic acid, epinephrine and uric acid at over-oxidized poly(p-aminophenol) film modified electrode. J Electroanal Chem (Lausanne) 2013. [DOI: 10.1016/j.jelechem.2013.02.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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56
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Jiao L, Deng Q, Wang Y, Li H. Determination of Enantiomeric Composition of Tryptophan by Fluorescence Spectroscopy Combined with Principal Component Regression. ANAL LETT 2013. [DOI: 10.1080/00032719.2012.733901] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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57
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Zare HR, Ghanbari Z, Nasirizadeh N, Benvidi A. Simultaneous determination of adrenaline, uric acid, and cysteine using bifunctional electrocatalyst of ruthenium oxide nanoparticles. CR CHIM 2013. [DOI: 10.1016/j.crci.2013.01.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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58
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Zare HR, Rahmani N, Nasirizadeh N, Benvidi A. A combination of nordihydroguaiaretic acid as an electron transfer mediator and multi-walled carbon nanotubes for simultaneous electrocatalytic determination of noradrenaline, uric acid, and tryptophan. Catal Sci Technol 2013. [DOI: 10.1039/c3cy20761g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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59
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Li T, Wang Z, Xie H, Fu Z. Highly sensitive trivalent copper chelate-luminol chemiluminescence system for capillary electrophoresis detection of epinephrine in the urine of smoker. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 911:1-5. [PMID: 23217298 DOI: 10.1016/j.jchromb.2012.10.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2012] [Revised: 09/11/2012] [Accepted: 10/15/2012] [Indexed: 11/19/2022]
Abstract
Epinephrine (EP) is one of the most important neurotransmitters and hormones. Some previous literatures show that there is a close relation between its release and smoking. To compare the levels of EP in urines of smokers and nonsmokers, a sensitive chemiluminescence (CL) system, luminol-diperiodatocuprate (III) (K(5)[Cu(HIO(6))(2)], DPC), has been developed and validated for the determination of EP after CE separation. The DPC-luminol-EP CL reaction showed very intensive emission and fast kinetic characteristics, thus led to a high sensitivity in the flow-through detection mode for capillary electrophoresis. With the peak height as a quantitative parameter, the relative CL intensity was linear with the EP concentration in the range of 2.0-400ng/mL, with a limit of detection of 0.82ng/mL (S/N=3). The reproducibility was assessed by intra- and inter-day relative standard deviations (RSDs) for 11 replicate determinations of EP standard samples at low, medium and high concentrations. The intra- and inter-day RSDs for CL signals were 5.5%-6.6% and 6.1%-7.5%, respectively, and those for migration times were 3.4%-5.8% and 4.3%-6.3%, respectively. The presented method was successfully applied to the determination of EP in EP injection and urine samples of smokers and nonsmokers. The recovery test results for urine samples ranged from 86.5 to 112.0%, which demonstrated the reliability of this method. The results for urine sample detection indicate that the average level of EP in the urines of the smoker group is obviously higher than that in the urines of the nonsmoker group, which may demonstrate that smoking can stimulate the release of EP in human body.
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Affiliation(s)
- Tao Li
- Key Laboratory of Luminescence and Real-Time Analysis (Ministry of Education), College of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China
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60
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Salmanpour S, Tavana T, Pahlavan A, Khalilzadeh MA, Ensafi AA, Karimi-Maleh H, Beitollahi H, Kowsari E, Zareyee D. Voltammetric determination of norepinephrine in the presence of acetaminophen using a novel ionic liquid/multiwall carbon nanotubes paste electrode. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012; 32:1912-1918. [DOI: 10.1016/j.msec.2012.05.038] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Revised: 01/19/2012] [Accepted: 05/22/2012] [Indexed: 11/26/2022]
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61
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Raoof JB, Chekin F, Ojani R, Barari S, Anbia M, Mandegarzad S. Synthesis and characterization of ordered mesoporous carbon as electrocatalyst for simultaneous determination of epinephrine and acetaminophen. J Solid State Electrochem 2012. [DOI: 10.1007/s10008-012-1807-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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62
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Goyal RN, Agrawal B. Ag ion irradiated based sensor for the electrochemical determination of epinephrine and 5-hydroxytryptamine in human biological fluids. Anal Chim Acta 2012; 743:33-40. [PMID: 22882821 DOI: 10.1016/j.aca.2012.06.053] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Revised: 06/25/2012] [Accepted: 06/29/2012] [Indexed: 12/01/2022]
Abstract
A promising and highly sensitive voltammetric method has been developed for the first time for the determination of epinephrine (EP) and 5-hydroxytryptamine (5-HT) using 120 MeV Ag ion irradiated multi-walled carbon nano tube (MWCNT) based sensor. The MWCNT were irradiated at various fluences of 1e12, 3e12 and 1e13 ions cm(-2) using palletron accelerator. The simultaneous determination of EP and 5-HT has been carried out in phosphate buffer solution of pH 7.20 using square wave voltammetry and cyclic voltammetry. Experimental results suggested that irradiation of MWCNT by Ag ions enhanced the electrocatalytic activity due to increase in effective surface area and insertion of Ag ions, leading to a remarkable enhancement in peak currents and shift of peak potentials to less positive values as compared to the unirradiated MWCNT (pristine). The developed sensor exhibited a linear relationship between peak current and concentration of EP and 5-HT in the range 0.1-105 μM with detection limit (3σ/b) of 2 nM and 0.75 nM, respectively. The practical utility of irradiation based MWCNT sensor has been demonstrated for the determination of EP and 5-HT in human urine and blood samples.
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Affiliation(s)
- Rajendra N Goyal
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, India.
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63
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Photoactivation by visible light of CdTe quantum dots for inline generation of reactive oxygen species in an automated multipumping flow system. Anal Chim Acta 2012; 735:69-75. [DOI: 10.1016/j.aca.2012.05.034] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Revised: 05/17/2012] [Accepted: 05/18/2012] [Indexed: 11/18/2022]
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64
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Ly SY. Determination of Epinephrine in Carp Brain Cells by Square-Wave Anodic Stripping Voltammetry with Carbon Nanotubes. ANAL LETT 2012. [DOI: 10.1080/00032719.2012.673104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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65
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MCM/ZrO2 nanoparticles modified electrode for simultaneous and selective voltammetric determination of epinephrine and acetaminophen. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2012. [DOI: 10.1007/s13738-012-0121-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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66
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Paşahan A, Köytepe S, Cengiz MA, Seçkin T. Synthesis and characterization of polyurethanes containing glucose for selective determination of epinephrine in the presence of a high concentration of ascorbic acid. POLYM INT 2012. [DOI: 10.1002/pi.4292] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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67
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A highly sensitive method for determination of guanine, adenine and epinephrine using poly-melamine film modified glassy carbon electrode. J Electroanal Chem (Lausanne) 2012. [DOI: 10.1016/j.jelechem.2012.04.026] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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68
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Brondani D, Scheeren CW, Dupont J, Vieira IC. Halloysite clay nanotubes and platinum nanoparticles dispersed in ionic liquid applied in the development of a catecholamine biosensor. Analyst 2012; 137:3732-9. [DOI: 10.1039/c2an35313j] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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69
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Zheng LQ, Liu LT, Li J, Li QM. Determination of Adrenaline by Atomic Absorption Spectrometry Using Copper as Probe Reagent in Pharmaceutical and Serum Samples. J CHIN CHEM SOC-TAIP 2011. [DOI: 10.1002/jccs.201190146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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70
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Lu X, Li Y, Du J, Zhou X, Xue Z, Liu X, Wang Z. A novel nanocomposites sensor for epinephrine detection in the presence of uric acids and ascorbic acids. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.06.056] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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71
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Kamruzzaman M, Alam AM, Lee SH, Kim YH, Kim SH. A terbium-sensitized spectrofluorimetric method for determination of catecholamines in a serum sample with micelle medium. LUMINESCENCE 2011; 27:84-90. [DOI: 10.1002/bio.1332] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Revised: 04/11/2011] [Accepted: 05/18/2011] [Indexed: 11/10/2022]
Affiliation(s)
| | - Al-Mahmnur Alam
- Department of Chemistry; Kyungpook National University; Daegu; South Korea
| | | | - Young Ho Kim
- Research Institute of Advanced Energy Technology; Kyungpook National University; Daegu; South Korea
| | - Sung Hong Kim
- Korea Basic Science Institute Daegu Centre; Daegu; South Korea
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72
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Mazloum-Ardakani M, Beitollahi H, Amini MK, Mirkhalaf F, Abdollahi-Alibeik M. Simultaneous and selective voltammetric determination of , and at a nanoparticles modified paste electrode. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2011; 3:673-677. [PMID: 32938089 DOI: 10.1039/c0ay00740d] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A new carbon paste electrode modified with ZrO2 nanoparticles (ZONMCPE) was prepared, and used to study the electrooxidation of epinephrine (EP), acetaminophen (AC), folic acid (FA) and their mixtures by electrochemical methods. The modified electrode displayed strong resolving function for the overlapping voltammetric responses of EP, AC and FA into three well-defined peaks. The potential differences between EP - AC, AC - FA and EP - FA were 210, 290 and 500 mV respectively. Differential pulse voltammetry (DPV) peak currents of EP, AC and FA increased linearly with their concentration at the ranges of 2.0 × 10-7-2.2 × 10-3 M, 1.0 × 10-6-2.5 × 10-3 M and 2.0 × 10-5-2.5 × 10-3 M, respectively. The detection limits for EP, AC and FA were found to be 9.5 × 10-8, 9.1 × 10-7and 9.8 × 10-6 M, respectively.
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Affiliation(s)
| | - Hadi Beitollahi
- Department of Chemistry, Faculty of Science, Yazd University, Yazd, 89195-741, I.R. Iran.
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73
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Liu Y, Liu Z, Shi Y. Sensitive determination of epinephrine in pharmaceutical preparation by flow injection coupled with chemiluminescence detection and mechanism study. LUMINESCENCE 2011; 26:59-64. [DOI: 10.1002/bio.1186] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2009] [Revised: 10/13/2009] [Accepted: 11/13/2009] [Indexed: 11/09/2022]
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74
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Mazloum-Ardakani M, Beitollahi H, Amini MK, Mirjalili BF, Mirkhalaf F. Simultaneous determination of epinephrine and uric acid at a gold electrode modified by a 2-(2,3-dihydroxy phenyl)-1, 3-dithiane self-assembled monolayer. J Electroanal Chem (Lausanne) 2011. [DOI: 10.1016/j.jelechem.2010.09.020] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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75
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Preparation and evaluation of a monolithic molecularly imprinted polymer for the chiral separation of neurotransmitters and their analogues by capillary electrochromatography. J Chromatogr A 2011; 1218:849-55. [DOI: 10.1016/j.chroma.2010.12.054] [Citation(s) in RCA: 111] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2010] [Revised: 12/08/2010] [Accepted: 12/10/2010] [Indexed: 11/20/2022]
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76
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Caslavska J, Thormann W. Stereoselective determination of drugs and metabolites in body fluids, tissues and microsomal preparations by capillary electrophoresis (2000–2010). J Chromatogr A 2011; 1218:588-601. [DOI: 10.1016/j.chroma.2010.08.072] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Revised: 08/20/2010] [Accepted: 08/25/2010] [Indexed: 10/19/2022]
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77
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Application of pyrolytic graphite modified with nano-diamond/graphite film for simultaneous voltammetric determination of epinephrine and uric acid in the presence of ascorbic acid. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.08.043] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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78
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Jemelkova Z, Barek J, Zima J. Determination of Epinephrine at Different Types of Carbon Paste Electrodes. ANAL LETT 2010. [DOI: 10.1080/00032710903518773] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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79
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Mazloum-Ardakani M, Beitollahi H, Mohseni MAS, Benvidi A, Naeimi H, Nejati-Barzoki M, Taghavinia N. Simultaneous determination of epinephrine and acetaminophen concentrations using a novel carbon paste electrode prepared with 2,2′-[1,2 butanediylbis(nitriloethylidyne)]-bis-hydroquinone and TiO2 nanoparticles. Colloids Surf B Biointerfaces 2010; 76:82-7. [DOI: 10.1016/j.colsurfb.2009.10.019] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2009] [Revised: 10/05/2009] [Accepted: 10/09/2009] [Indexed: 10/20/2022]
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80
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Castro-Puyana M, Drewnowska R, Pérez-Fernández V, Ángeles García M, Crego AL, Marina ML. Simultaneous separation of epinephrine and norepinephrine enantiomers by EKC: Application to the analysis of pharmaceutical formulations. Electrophoresis 2009; 30:2947-54. [DOI: 10.1002/elps.200900250] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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81
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A novel strategy for rapid real-time chiral discrimination of enantiomers using serum albumin functionalized QCM biosensor. Biosens Bioelectron 2009; 25:488-92. [PMID: 19647989 DOI: 10.1016/j.bios.2009.06.040] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2009] [Revised: 06/23/2009] [Accepted: 06/26/2009] [Indexed: 11/20/2022]
Abstract
A novel and effective method has been developed for chiral discrimination using a quartz crystal microbalance (QCM) biosensor with self-assembled bovine serum albumin (BSA) or human serum albumin (HSA). The successfully constructed QCM chiral biosensors exhibited rapid and real-time enantioselective recognition. The QCM chiral discrimination factor (alpha(QCM)) can be calculated through resonance frequency shifts in response to five pairs of enantiomers. Moreover, the interactions between these ten enantiomers and two serum albumins (SA) were investigated in detail by means of ultraviolet-visible (UV-vis) and fluorescence (FL) spectra. The results indicated that the discrimination ability were quite different between BSA and HSA. R,S-1-(3-Methoxyphenyl)ethylamine (R,S-3-MPEA) and R,S-1-(4-methoxyphenyl)ethylamine (R,S-4-MPEA) can be easily differentiated by the BSA sensor, while the selectivity of the HSA sensor for R,S-tetrahydronaphthylamine (R,S-TNA), R,S-2-octanol (R,S-2-OT) and R,S-methyl lactate (R,S-MEL) was higher than that of the BSA sensor. The UV and FL spectra indicated the formation of a complex between SA and enantiomers and strong fluorescence quenching through static quenching mechanism. The in-depth study demonstrated that the calculated UV/FL discrimination factors (alpha(UV) and alpha(FL)) were consistent with the QCM experimental results (alpha(QCM)).
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82
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Bazylak G, Monge ME, Everaert J, Nagels LJ. Hydrophobicity-aided potentiometric detection of catecholamines, beta-agonists, and beta-blockers in a mixed-solvent capillary electrophoresis system. J Sep Sci 2009; 32:135-46. [DOI: 10.1002/jssc.200800450] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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83
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Agboola B, Ozoemena K. Efficient Electrocatalytic Detection of Epinephrine at Gold Electrodes Modified with Self-Assembled Metallo-Octacarboxyphthalocyanine Complexes. ELECTROANAL 2008. [DOI: 10.1002/elan.200804240] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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84
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Wang Y, Zhang F, Liang J, Li H, Kong J. A novel strategy for the determination of enantiomeric compositions of chiral compounds by chemometric analysis of the UV-vis spectra of bovine serum albumin receptor-ligand mixtures. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2007; 68:279-83. [PMID: 17350880 DOI: 10.1016/j.saa.2006.11.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2006] [Revised: 11/25/2006] [Accepted: 11/26/2006] [Indexed: 05/14/2023]
Abstract
In this work, a novel strategy was constructed to determine the enantiomeric composition of chiral substances discriminated by bovine serum albumin (BSA) based on the UV-vis spectra of the receptor-ligand mixtures coupled with partial least squares (PLS-1) analysis. Taking tryptophan (Trp) enantiomer as an example, when 20 microM BSA was used, the enantiomeric composition was accurately determined with concentration of only 100 nM and the corresponding enantiomeric excess as high as 98% (or -98%), which is relatively more sensitive than in literature. Furthermore, the BSA-based approach was also used to predict the enantiomeric composition of other chiral compounds, such as phenylalanine (Phe), tyrosine (Tyr), alanine (Ala), cysteine (Cys), DOPA and propranolol (Prop). The results fully demonstrate that BSA is effective in determination of enantiomeric composition of some chiral compounds.
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Affiliation(s)
- Yunxia Wang
- Department of Chemistry, Fudan University, Shanghai 200433, PR China
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85
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Lorin M, Delépée R, Morin P, Ribet JP. Quantification of very low enantiomeric impurity of efaroxan using a dual cyclodextrin system by capillary electrophoresis. Anal Chim Acta 2007; 592:139-45. [PMID: 17512818 DOI: 10.1016/j.aca.2007.04.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2007] [Revised: 04/02/2007] [Accepted: 04/11/2007] [Indexed: 10/23/2022]
Abstract
A rapid method for the enantiomeric purity determination of efaroxan has been developed by capillary electrophoresis (CE) using a dual cyclodextrin (CD) system. The influence of the nature and the concentration of CDs on separation parameters has been studied. High resolution (R(s)=7) and peak efficiency (104,000-121,000 theoretical plates) values were obtained for efaroxan enantiomers by adding two cyclodextrins, one neutral (7.5 mM DM-beta-CD) and the other negatively charged (3 mM CM-beta-CD) to the running buffer composed of 100 mM phosphoric acid-triethanolamine (pH 3). These resolution and peak efficiencies values allowed the quantitation of the (S)-enantiomer of efaroxan at very low enantiomeric excess even if the minor component migrates after the major one. This method was fully validated for the enantiomeric impurity determination of the (S)-form of efaroxan at the 0.05% level. Calibration curve, expressed by the peak areas ratio versus the enantiomeric purity was linear over the 0.05-1% enantiomeric impurity range (r2=0.9996). Limits of detection (LOD) and quantification (LOQ), expressed in term of (S)-enantiomer impurity were 0.02% and 0.05%, respectively. The accuracy of the method at 0.12%, 0.50% and 0.80% enantiomeric impurity levels for the (S)-form were determined. Recoveries were in 94-102% range for each quality control sample and were determined with good precision (intra-day R.S.D.=3.54%, inter-day R.S.D.=5.33%).
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Affiliation(s)
- Marie Lorin
- Institut de Chimie Organique et Analytique, CNRS FR 2708, UMR 6005, Université d'Orléans, BP 6759, Orléans 45067 Cedex 2, France
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86
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Yang Z, Hu G, Chen X, Zhao J, Zhao G. The nano-Au self-assembled glassy carbon electrode for selective determination of epinephrine in the presence of ascorbic acid. Colloids Surf B Biointerfaces 2007; 54:230-5. [PMID: 17158037 DOI: 10.1016/j.colsurfb.2006.10.033] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2006] [Revised: 10/22/2006] [Accepted: 10/23/2006] [Indexed: 11/22/2022]
Abstract
Gold nanoparticles were self-assembled to the modified glassy carbon electrode (GC) with cysteamine (CA) to prepare the nano-Au/CA/GC modified electrode. The electrochemical behavior of epinephrine (EP) on the modified electrode was explored with cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Epinephrine gave a pair of redox peaks at E(pa)=0.190 mV and E(pc)=-0.224 mV (versus SCE), respectively. The nano-Au/CA/GC modified electrode shows an excellent electrocatalytic activity for the oxidation of EP. The modified electrode could be used to determine EP in the presence of ascorbic acid (AA). The response of catalytic current with EP concentration shows a linear relation in the range of 1.0 x 10(-7) to 5.0 x 10(-4) mol L(-1) with the correlation coefficient of 0.998. The detection limit is 4.0 x 10(-8) mol L(-1). The modified electrode exhibited a good reproducibility, sensitivity and stability for the determination of EP injection.
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Affiliation(s)
- Zhousheng Yang
- College of Chemistry and Materials Science, Anhui Key Laboratory of Functional Molecular Solids, Anhui Normal University, Wuhu 241000, PR China.
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Abstract
This paper provides an overview on the current status of the analysis of biogenic amines by CE. The basic CE separation and detection strategies for the analysis of biogenic amines are briefly described. CZE and MEKC that provide highly efficient and reproducible analysis of biogenic amines are particularly surveyed. With respect to the detection of biogenic amines, we focus on LIF, UV-visible absorption, electrochemiluminescence, and MS. Derivatization strategies, indirect methods, and on-line concentration techniques such as field-amplified sample stacking, sweeping, and use of polymer solution are described. To show the practicality of CE, we highlight currently developed techniques for the determinations of biogenic amines in biological samples, including foods, beverages, cerebrospinal fluids, urine, and single cells.
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Affiliation(s)
- Tai-Chia Chiu
- Department of Chemistry, National Taiwan University, Taipei, Taiwan
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Tsunoda M. Recent advances in methods for the analysis of catecholamines and their metabolites. Anal Bioanal Chem 2006; 386:506-14. [PMID: 16924378 DOI: 10.1007/s00216-006-0675-z] [Citation(s) in RCA: 133] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2006] [Revised: 05/05/2006] [Accepted: 07/07/2006] [Indexed: 10/24/2022]
Abstract
Catecholamines, for example epinephrine, norepinephrine, and dopamine, are widely distributed and are important neurotransmitters and hormones in mammalian species. Several methods have been developed for analysis of catecholamines and related compounds. Determination of catecholamines in biological fluids has enabled us to clarify the physiological role played by these amines. Catecholamine levels in plasma and/or urine are also useful for diagnosis of several diseases, for example hypertension, pheochromocytoma, and neuroblastoma. This review covers reports from 2000 to the present of methods for the analysis of catecholamines and their metabolites.
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Affiliation(s)
- Makoto Tsunoda
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
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