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Ahn M, Kim J. Electrochemical behavior of dopamine and ascorbic acid at dendritic Au rod surfaces: Selective detection of dopamine in the presence of high concentration of ascorbic acid. J Electroanal Chem (Lausanne) 2012. [DOI: 10.1016/j.jelechem.2012.08.012] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Revin SB, John SA. Highly sensitive determination of uric acid in the presence of major interferents using a conducting polymer film modified electrode. Bioelectrochemistry 2012; 88:22-9. [PMID: 22763421 DOI: 10.1016/j.bioelechem.2012.05.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2012] [Revised: 05/17/2012] [Accepted: 05/21/2012] [Indexed: 12/12/2022]
Abstract
This paper describes the sensitive and selective determination of uric acid (UA) in the presence of important interferences, ascorbic acid (AA), dopamine (DA), tyrosine (Tyr) and methionine (Met) at physiological pH using an electropolymerized film of 3-amino-5-mercapto-1,2,4-triazole on glassy carbon (p-AMTa) electrode. The p-AMTa electrode shows an excellent electrocatalytic activity towards UA. This was understood from the observed higher oxidation current and heterogeneous rate constant (3.24×10(-5)ms(-1)) for UA when compared to bare GC electrode (4.63×10(-6)ms(-1)). The selective determination of UA in the presence of 1000-fold excess of AA was achieved using p-AMTa electrode. Further, the p-AMTa electrode was successfully used for the simultaneous and selective determination of UA in the presence of important interferences, DA, Tyr and Met. Using amperometric method, 40nM UA was detected for the first time. The current response of UA was increased linearly while increasing its concentration from 40nM to 0.1mM and a detection limit was found to be 0.52nM (S/N=3). Finally, the practical application of the present method was demonstrated by determining UA in human urine and blood serum samples.
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Affiliation(s)
- S Brillians Revin
- Centre for Nanoscience & Nanotechnology, Department of Chemistry, Gandhigram Rural Institute, Gandhigram - 624 302, Dindigul, Tamilnadu, India
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Tsai TH, Chen TW, Chen SM, Sarawathi R. Nickel, copper and manganese hexacyanoferrate with poly(3,4-ethylenedioxythiophene) hybrid film modified electrode for selectively determination of ascorbic acid. RUSS J ELECTROCHEM+ 2012. [DOI: 10.1134/s1023193512030147] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Wang H, Jiang P, Bo X, Guo L. Mesoporous carbon nanofibers as advanced electrode materials for electrocatalytic applications. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.01.027] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Colleran JJ, Breslin CB. Simultaneous electrochemical detection of the catecholamines and ascorbic acid at PEDOT/S-β-CD modified gold electrodes. J Electroanal Chem (Lausanne) 2012. [DOI: 10.1016/j.jelechem.2011.12.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Gong W, Dou ZY, Liu P, Cai XY, He XQ. Simultaneous determination of dopamine, ascorbic acid by polyethylene oxide (PEO) covalently modified glassy carbon electrode. J Electroanal Chem (Lausanne) 2012. [DOI: 10.1016/j.jelechem.2011.12.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Li J, Zhang X. Fabrication of Poly(Aspartic Acid)-Nanogold Modified Electrode and Its Application for Simultaneous Determination of Dopamine, Ascorbic Acid, and Uric Acid. ACTA ACUST UNITED AC 2012. [DOI: 10.4236/ajac.2012.33028] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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59
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Mashhadizadeh MH, Yousefi T, Nozad Golikand A. A nickel hexacyanoferrate and poly(1-naphthol) hybrid film modified electrode used in the selective electroanalysis of dopamine. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2011.10.070] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Li Y, Liu X, Wei W. Square Wave Voltammetry for Selective Detection of Dopamine Using Polyglycine Modified Carbon Ionic Liquid Electrode. ELECTROANAL 2011. [DOI: 10.1002/elan.201100370] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Quan DP, Tuyen DP, Lam TD, Tram PTN, Binh NH, Viet PH. Electrochemically selective determination of dopamine in the presence of ascorbic and uric acids on the surface of the modified Nafion/single wall carbon nanotube/poly(3-methylthiophene) glassy carbon electrodes. Colloids Surf B Biointerfaces 2011; 88:764-70. [PMID: 21907551 DOI: 10.1016/j.colsurfb.2011.08.012] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Revised: 08/11/2011] [Accepted: 08/12/2011] [Indexed: 11/26/2022]
Abstract
A voltammetric method based on a combination of incorporated Nafion, single-walled carbon nanotubes and poly(3-methylthiophene) film-modified glassy carbon electrode (NF/SWCNT/PMT/GCE) has been successfully developed for selective determination of dopamine (DA) in the ternary mixture of dopamine, ascorbic acid (AA) and uric acid (UA) in 0.1M phosphate buffer solution (PBS) pH 4. It was shown that to detect DA from binary DA-AA mixture, the use of NF/PMT/GCE was sufficient, but to detect DA from ternary DA-AA-UA mixture NF/SWCNT/PMT/GCE was required. The later modified electrode exhibits superior electrocatalytic activity towards AA, DA and UA thanks to synergic effect of NF/SWCNT (combining unique properties of SWCNT such as high specific surface area, electrocatalytic and adsorptive properties, with the cation selectivity of NF). On the surface of NF/SWCNT/PMT/GCE AA, DA, UA were oxidized respectively at distinguishable potentials of 0.15, 0.37 and 0.53 V (vs. Ag/AgCl), to form well-defined and sharp peaks, making possible simultaneous determination of each compound. Also, it has several advantages, such as simple preparation method, high sensitivity, low detection limit and excellent reproducibility. Thus, the proposed NF/SWCNT/PMT/GCE could be advantageously employed for the determination of DA in real pharmaceutical formulations.
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Affiliation(s)
- Do Phuc Quan
- Research Centre for Environmental Technology and Sustainable Development, Hanoi University of Science, 334 Nguyen Trai Road, Ha Noi, Viet Nam.
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Li J, Chen J, Zhang X. Determination of dopamine with improved sensitivity by exploiting an accumulation effect at a nano-gold electrode modified with poly(sulfosalicylic acid). Mikrochim Acta 2011. [DOI: 10.1007/s00604-011-0632-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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63
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Sekli-Belaidi F, Evrard D, Gros P. Evidence of an EC’ mechanism occurring during the simultaneous assay of ascorbic and uric acids on poly(3,4-ethylenedioxythiophene) modified gold microsensor. Electrochem commun 2011. [DOI: 10.1016/j.elecom.2011.02.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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64
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Simultaneous electrochemical determination of dopamine and ascorbic acid using poly (l-serine) modified carbon paste electrode. J Mol Liq 2011. [DOI: 10.1016/j.molliq.2011.03.019] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Maciejewska J, Pisarek K, Bartosiewicz I, Krysiński P, Jackowska K, Bieguński A. Selective detection of dopamine on poly(indole-5-carboxylic acid)/tyrosinase electrode. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.01.043] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Stoyanova A, Ivanov S, Tsakova V, Bund A. Au nanoparticle–polyaniline nanocomposite layers obtained through layer-by-layer adsorption for the simultaneous determination of dopamine and uric acid. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2010.09.054] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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67
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Gonçalves AR, Ghica ME, Brett CM. Preparation and characterisation of poly(3,4-ethylenedioxythiophene) and poly(3,4-ethylenedioxythiophene)/poly(neutral red) modified carbon film electrodes, and application as sensors for hydrogen peroxide. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2010.11.056] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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68
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Sekli-Belaidi F, Temple-Boyer P, Gros P. Voltammetric microsensor using PEDOT-modified gold electrode for the simultaneous assay of ascorbic and uric acids. J Electroanal Chem (Lausanne) 2010. [DOI: 10.1016/j.jelechem.2010.06.007] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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69
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Ensafi AA, Arabzadeh A, Karimi-Maleh H. Simultaneous Determination of Dopamine and Uric Acid by Electrocatalytic Oxidation on a Carbon Paste Electrode Using Pyrogallol Red as a Mediator. ANAL LETT 2010. [DOI: 10.1080/00032711003687062] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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70
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Simultaneous determination of ascorbic acid, dopamine and uric acid by use of a MWCNT modified carbon-ceramic electrode and differential pulse voltammetry. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.04.052] [Citation(s) in RCA: 145] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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71
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Tsai TH, Chen TW, Chen SM. Selective Electroanalysis of Ascorbic Acid Using a Nickel Hexacyanoferrate and Poly(3,4-ethylenedioxythiophene) Hybrid Film Modified Electrode. ELECTROANAL 2010. [DOI: 10.1002/elan.200900610] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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72
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Atta NF, El-Kady MF, Galal A. Simultaneous determination of catecholamines, uric acid and ascorbic acid at physiological levels using poly(N-methylpyrrole)/Pd-nanoclusters sensor. Anal Biochem 2010; 400:78-88. [DOI: 10.1016/j.ab.2010.01.001] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2009] [Revised: 12/17/2009] [Accepted: 01/06/2010] [Indexed: 10/20/2022]
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73
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Stoyanova A, Tsakova V. Copper-modified poly(3,4-ethylenedioxythiophene) layers for selective determination of dopamine in the presence of ascorbic acid: II Role of the characteristics of the metal deposit. J Solid State Electrochem 2010. [DOI: 10.1007/s10008-010-1017-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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74
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Stoyanova A, Tsakova V. Copper-modified poly(3,4-ethylenedioxythiophene) layers for selective determination of dopamine in the presence of ascorbic acid: I. Role of the polymer layer thickness. J Solid State Electrochem 2010. [DOI: 10.1007/s10008-010-1007-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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75
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Pfaffen V, Ortiz P, Córdoba de Torresi S, Torresi R. On the pH dependence of electroactivity of poly(methylene blue) films. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2009.10.062] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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76
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Voltammetric determination of dopamine in the presence of uric acid using a 2-hydroxy-1-(1-hydroxynaphthyl-2-azo)- naphthalin-4-sulfonic acid modified glassy carbon electrode. JOURNAL OF THE SERBIAN CHEMICAL SOCIETY 2010. [DOI: 10.2298/jsc100311134e] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A polymerized film of 2-hydroxy-1-(1-hydroxynaphthyl-2-azo)-
naphthalin-4-sulfonic acid (HHNANSA) was prepared at the surface of a glassy
carbon electrode by electropolymerization. The modified electrode was used
for the simultaneous determination of dopamine (DA) and uric acid (UA). The
electrochemical behaviors of the compounds at the surface of the modified
electrode were studied using cyclic voltammetry, chronoamperometry, and
square wave voltammetry (SWV). The experimental results indicated that the
modified electrode exhibited an efficient electrocatalytic activity towards
the oxidation of DA and UA, with a peak separation of about 140 mV at pH 5.0.
Using chronoamperometry, the catalytic reaction rate constant was measured
and found to equal to 1.23 ? 104 mol-1 L s-1. At pH 5.0, the catalytic peak
currents linearly depended on the DA and/or UA concentrations in the range of
1.0 - 300 ?mol L-1 DA (two linear segments with different slopes) and 6.7 -
20 ?mol L-1 UA, using SWV. The detection limits for DA and UA were 0.25 ?mol
L-1 and 1.17 ?mol L-1, respectively. The RSD % for 40.0 and 140.0 ?mol L-1 DA
were 1.9 % and 2.2 %, respectively, whereas for 10.0 and 20.0 ?mol L-1 UA,
they were 1.8 % and 1.2 %, respectively. The modified electrode showed good
sensitivity, selectivity, and stability. It was successfully applied for the
determination of DA and UA in real samples, such as drugs and urine.
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77
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Komathi S, Gopalan AI, Lee KP. Nanomolar detection ofdopamine at multi-walled carbon nanotube grafted silica network/gold nanoparticle functionalised nanocomposite electrodes. Analyst 2010; 135:397-404. [DOI: 10.1039/b918335c] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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78
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Kim J, Park H, Ryu J, Jeon O, Paeng IR. COMPETITIVE ENZYME-LINKED IMMUNOSORBENT ASSAY FOR A SELECTIVE AND SENSITIVE DETERMINATION OF DOPAMINE IN THE PRESENCE OF ASCORBIC ACID AND URIC ACID. J Immunoassay Immunochem 2009; 31:33-44. [DOI: 10.1080/15321810903404988] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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79
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Pogulyaichenko NA, Hui S, Malev VV, Kondratiev VV. Gold electroless deposition into poly-3,4-ethylenedioxythiophene films. RUSS J ELECTROCHEM+ 2009. [DOI: 10.1134/s1023193509100103] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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80
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Raoof JB, Kiani A, Ojani R, Valiollahi R, Rashid-Nadimi S. Simultaneous voltammetric determination of ascorbic acid and dopamine at the surface of electrodes modified with self-assembled gold nanoparticle films. J Solid State Electrochem 2009. [DOI: 10.1007/s10008-009-0917-z] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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81
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Ensafi AA, Taei M, Khayamian T. A differential pulse voltammetric method for simultaneous determination of ascorbic acid, dopamine, and uric acid using poly (3-(5-chloro-2-hydroxyphenylazo)-4,5-dihydroxynaphthalene-2,7-disulfonic acid) film modified glassy carbon electrode. J Electroanal Chem (Lausanne) 2009. [DOI: 10.1016/j.jelechem.2009.06.001] [Citation(s) in RCA: 136] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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82
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Kalimuthu P, John SA. Simultaneous determination of epinephrine, uric acid and xanthine in the presence of ascorbic acid using an ultrathin polymer film of 5-amino-1,3,4-thiadiazole-2-thiol modified electrode. Anal Chim Acta 2009; 647:97-103. [DOI: 10.1016/j.aca.2009.05.036] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2009] [Revised: 05/13/2009] [Accepted: 05/26/2009] [Indexed: 11/24/2022]
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83
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Rozlosnik N. New directions in medical biosensors employing poly(3,4-ethylenedioxy thiophene) derivative-based electrodes. Anal Bioanal Chem 2009; 395:637-45. [PMID: 19644677 DOI: 10.1007/s00216-009-2981-8] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2009] [Revised: 07/14/2009] [Accepted: 07/15/2009] [Indexed: 01/27/2023]
Abstract
Demand is growing in the field of medical diagnostics for simple, disposable devices that also demonstrate fast response times, are easy to handle, are cost-efficient, and are suitable for mass production. Polymer-based microfluidic devices meet the requirements of cost efficiency and mass production and they are suitable for biosensor applications. Conducting polymer-based electrochemical sensors have shown numerous advantages in a number of areas related to human health, such as the diagnosis of infectious diseases, genetic mutations, drug discovery, forensics and food technology, due to their simplicity and high sensitivity. One of the most promising group of conductive polymers is poly(3,4-ethylenedioxythiophene) (PEDOT) and its derivatives due to their attractive properties: high stability, high conductivity (up to 400-600 S/cm) and high transparency. This review paper summarizes newly developed methods associated with the application of PEDOT to diagnostic sensing.
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Affiliation(s)
- Noemi Rozlosnik
- Department of Micro- and Nanotechnology, Technical University of Denmark, Ørsteds Plads, Bygning 345e, DK-2800, Kgs. Lyngby, Denmark.
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84
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Abdelwahab AA, Lee HM, Shim YB. Selective determination of dopamine with a cibacron blue/poly-1,5-diaminonaphthalene composite film. Anal Chim Acta 2009; 650:247-53. [PMID: 19720200 DOI: 10.1016/j.aca.2009.07.054] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2009] [Revised: 07/20/2009] [Accepted: 07/21/2009] [Indexed: 11/29/2022]
Abstract
A selective detection method for dopamine (DA) was developed by incorporating cibacron blue (F3GA) into poly-1,5-diaminonaphthalene (PDAN) layer. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry (CV) were employed to characterize the modified surfaces. The modified electrode was effective in selectively facilitating the electron transfer of DA and blocking the interferences of negatively charged species attributed to the sulfonate groups in the F3GA/PDAN composite film. This method enabled the determination of DA in the presence of various interfering species, including ascorbic acid (AA), in a phosphate buffer solution (pH 7.4). The modified electrode demonstrated good performance in the detection of DA in a concentration range of 5.0-100 microM, with a detection limit (k=3) of 0.1+/-0.01 microM. The application was conducted for the determination of DA in a human urine sample and the sensor was proven to be rapid, has excellent selectivity, and stable amperometric response.
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Affiliation(s)
- Adel A Abdelwahab
- Department of Chemistry and Center for Innovative BioPhysio Sensor Technology, Pusan National University, Busan 609-735, South Korea
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A Nonoxidative Electrochemical Sensor Based on a Self-Doped Polyaniline/Carbon Nanotube Composite for Sensitive and Selective Detection of the Neurotransmitter Dopamine: A Review. SENSORS 2008; 8:8423-8452. [PMID: 27873994 PMCID: PMC3791025 DOI: 10.3390/s8128423] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2008] [Revised: 12/12/2008] [Accepted: 12/16/2008] [Indexed: 11/16/2022]
Abstract
Most of the current techniques for in vivo detection of dopamine exploit the ease of oxidation of this compound. The major problem during the detection is the presence of a high concentration of ascorbic acid that is oxidized at nearly the same potential as dopamine on bare electrodes. Furthermore, the oxidation product of dopamine reacts with ascorbic acid present in samples and regenerates dopamine again, which severely limits the accuracy of the detection. Meanwhile, the product could also form a melanin-like insulating film on the electrode surface, which decreases the sensitivity of the electrode. Various surface modifications on the electrode, new materials for making the electrodes, and new electrochemical techniques have been exploited to solve these problems. Recently we developed a new electrochemical detection method that did not rely on direct oxidation of dopamine on electrodes, which may naturally solve these problems. This approach takes advantage of the high performance of our newly developed poly(anilineboronic acid)/carbon nanotube composite and the excellent permselectivity of the ion-exchange polymer Nafion. The high affinity binding of dopamine to the boronic acid groups of the polymer affects the electrochemical properties of the polyaniline backbone, which act as the basis for the transduction mechanism of this non-oxidative dopamine sensor. The unique reduction capability and high conductivity of single-stranded DNA functionalized single-walled carbon nanotubes greatly improved the electrochemical activity of the polymer in a physiologically-relevant buffer, and the large surface area of the carbon nanotubes increased the density of the boronic acid receptors. The high sensitivity and selectivity of the sensor show excellent promise toward molecular diagnosis of Parkinson's disease. In this review, we will focus on the discussion of this novel detection approach, the new interferences in this detection approach, and how to eliminate these interferences toward in vivo and in vitro detection of the neurotransmitter dopamine.
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86
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Simultaneous voltammetric determination of ascorbic acid, dopamine and uric acid by methylene blue adsorbed on a phosphorylated zirconia–silica composite electrode. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2008.07.021] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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87
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Hou S, Zheng N, Feng H, Li X, Yuan Z. Determination of dopamine in the presence of ascorbic acid using poly(3,5-dihydroxy benzoic acid) film modified electrode. Anal Biochem 2008; 381:179-84. [DOI: 10.1016/j.ab.2008.03.055] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2008] [Revised: 03/11/2008] [Accepted: 03/13/2008] [Indexed: 10/22/2022]
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88
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Ye F, Nan J, Wang L, Song Y, Kim KB. The ultrasonic electropolymerization of an 5-[o-(4-bromine amyloxy)phenyl]-10,15,20-triphenylporphrin (o-BrPETPP) film electrode and its electrocatalytic properties to dopamine oxidation in aqueous solution. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2007.12.063] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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