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El-Akaad S, Mohamed MA, Abdelwahab NS, Abdelaleem EA, De Saeger S, Beloglazova N. Capacitive sensor based on molecularly imprinted polymers for detection of the insecticide imidacloprid in water. Sci Rep 2020; 10:14479. [PMID: 32879399 PMCID: PMC7468110 DOI: 10.1038/s41598-020-71325-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 08/11/2020] [Indexed: 12/26/2022] Open
Abstract
This manuscript reports on the development of a capacitive sensor for the detection of imidacloprid (IMD) in water samples based on molecularly imprinted polymers (MIPs). MIPs used as recognition elements were synthesized via a photo-initiated emulsion polymerization. The particles were carefully washed using a methanol (MeOH) /acetic acid mixture to ensure complete template removal and were then dried. The average size of the obtained particles was less than 1 µm. The imprinting factor (IF) for IMD was 6 and the selectivity factor (α) for acetamiprid, clothianidin, thiacloprid and thiamethoxam were 14.8, 6.8, 7.1 and 8.2, respectively. The particles were immobilized on the surface of a gold electrode by electropolymerization. The immobilized electrode could be spontaneously regenerated using a mixture of MeOH/10 mM of phosphate buffer (pH = 7.2)/triethylamine before each measurement and could be reused for 32 times. This is the first-time that automated regeneration was introduced as part of a sensing platform for IMD detection. The developed sensor was validated by the analysis of artificially spiked water samples. Under the optimal conditions, the linearity was in the range of 5-100 µM, with a limit of detection (LOD) of 4.61 µM.
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Affiliation(s)
- Suzan El-Akaad
- Centre of Excellence in Mycotoxicology and Public Health, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium.
- Department of Pharmaceutical Chemistry, National Organization for Drug Control and Research (NODCAR), Giza, Egypt.
| | - Mona A Mohamed
- Department of Pharmaceutical Chemistry, National Organization for Drug Control and Research (NODCAR), Giza, Egypt
| | - Nada S Abdelwahab
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Beni-Suef University, Benisuef, Egypt
| | - Eglal A Abdelaleem
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Beni-Suef University, Benisuef, Egypt
| | - Sarah De Saeger
- Centre of Excellence in Mycotoxicology and Public Health, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
| | - Natalia Beloglazova
- Centre of Excellence in Mycotoxicology and Public Health, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
- Nanotechnology Education and Research Center, South Ural State University, Chelyabinsk, Russia
- Department of General and Inorganic Chemistry, Chemistry Institute, Saratov State University, Astrakhanskaya, Saratov, Russia
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A capacitive immunosensor for tetracycline estimation using antibody modified polytyramine-alkanethiol ultra-thin film on gold. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114055] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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3
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Almeida L, Correia J, Viana A. Electrochemical and optical characterization of thin polydopamine films on carbon surfaces for enzymatic sensors. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.01.077] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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4
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Graniczkowska K, Pütz M, Hauser FM, De Saeger S, Beloglazova NV. Capacitive sensing of N-formylamphetamine based on immobilized molecular imprinted polymers. Biosens Bioelectron 2017; 92:741-747. [DOI: 10.1016/j.bios.2016.09.083] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 09/23/2016] [Accepted: 09/24/2016] [Indexed: 10/20/2022]
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Wilson TA, Musameh M, Kyratzis IL, Zhang J, Bond AM, Hearn MTW. Enhanced NADH Oxidation Using Polytyramine/Carbon Nanotube Modified Electrodes for Ethanol Biosensing. ELECTROANAL 2017. [DOI: 10.1002/elan.201700146] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Thomas A. Wilson
- School of Chemistry; Monash University; Clayton VIC 3800 Australia
- CSIRO; Manufacturing Flagship; Clayton VIC 3168 Australia
| | | | | | - Jie Zhang
- School of Chemistry; Monash University; Clayton VIC 3800 Australia
| | - Alan M. Bond
- School of Chemistry; Monash University; Clayton VIC 3800 Australia
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Electrochemical DNA sensors and aptasensors based on electropolymerized materials and polyelectrolyte complexes. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2015.11.025] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Naseri M, Fotouhi L, Ehsani A, Babaei F. Physicoelectrochemical properties of facilely electrosynthesized reduced graphene oxide/p-type conductive polymer nanocomposite film. NEW J CHEM 2016. [DOI: 10.1039/c5nj02969d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
As electro-active electrodes, composites of reduced graphene oxide and poly ortho aminophenol (POAP) with good uniformity are prepared by electropolymerization. In comparison with Ni-POAP, the Ni-rGO/POAP-modified electrode shows a higher response for methanol oxidation.
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Affiliation(s)
| | - Lida Fotouhi
- Department of Chemistry
- Alzahra University
- Tehran
- Iran
| | - Ali Ehsani
- Department of Chemistry
- Faculty of Science
- University of Qom
- Qom
- Iran
| | - Ferydon Babaei
- Department of Physics
- Faculty of Science
- University of Qom
- Qom
- Iran
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Farhadi K, Banisaeid S, Jamali A, Zebhi H, Ghelichkhah Z, Khalili H, Abbasi R. Application of Polytyramine Nanoparticles to the Corrosion Protection of Copper. J CHIN CHEM SOC-TAIP 2015. [DOI: 10.1002/jccs.201500219] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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9
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Shin M, Kaplan SV, Raider KD, Johnson MA. Simultaneous measurement and quantitation of 4-hydroxyphenylacetic acid and dopamine with fast-scan cyclic voltammetry. Analyst 2015; 140:3039-47. [PMID: 25785694 DOI: 10.1039/c4an02007c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Caged compounds have been used extensively to investigate neuronal function in a variety of preparations, including cell culture, ex vivo tissue samples, and in vivo. As a first step toward electrochemically measuring the extent of caged compound photoactivation while also measuring the release of the catecholamine neurotransmitter, dopamine, fast-scan cyclic voltammetry at carbon-fiber microelectrodes (FSCV) was used to electrochemically characterize 4-hydroxyphenylacetic acid (4HPAA) in the absence and presence of dopamine. 4HPAA is a by-product formed during the process of photoactivation of p-hydroxyphenacyl-based caged compounds, such as p-hydroxyphenylglutamate (pHP-Glu). Our data suggest that the oxidation of 4HPAA occurs through the formation of a conjugated species. Moreover, we found that a triangular waveform of -0.4 V to +1.3 V to -0.4 V at 600 V s(-1), repeated every 100 ms, provided an oxidation current of 4HPAA that was enhanced with a limit of detection of 100 nM, while also allowing the detection and quantitation of dopamine within the same scan. Along with quantifying 4HPAA in biological preparations, the results from this work will allow the electrochemical measurement of photoactivation reactions that generate 4HPAA as a by-product as well as provide a framework for measuring the photorelease of electroactive by-products from caged compounds that incorporate other chromophores.
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Affiliation(s)
- Mimi Shin
- Department of Chemistry and R.N. Adams Institute for Bioanalytical Chemistry, University of Kansas, Lawrence, KS 66045, USA.
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Ehsani A, Vaziri-Rad A, Babaei F, Shiri HM. Electrosynthesis, optical modeling and electrocatalytic activity of Ni-MWCNT-PT nanocomposite film. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.01.204] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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11
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Lenain P, De Saeger S, Mattiasson B, Hedström M. Affinity sensor based on immobilized molecular imprinted synthetic recognition elements. Biosens Bioelectron 2015; 69:34-9. [PMID: 25703726 DOI: 10.1016/j.bios.2015.02.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 01/30/2015] [Accepted: 02/10/2015] [Indexed: 10/24/2022]
Abstract
An affinity sensor based on capacitive transduction was developed to detect a model compound, metergoline, in a continuous flow system. This system simulates the monitoring of low-molecular weight organic compounds in natural flowing waters, i.e. rivers and streams. During operation in such scenarios, control of the experimental parameters is not possible, which poses a true analytical challenge. A two-step approach was used to produce a sensor for metergoline. Submicron spherical molecularly imprinted polymers, used as recognition elements, were obtained through emulsion polymerization and subsequently coupled to the sensor surface by electropolymerization. This way, a robust and reusable sensor was obtained that regenerated spontaneously under the natural conditions in a river. Small organic compounds could be analyzed in water without manipulating the binding or regeneration conditions, thereby offering a viable tool for on-site application.
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Affiliation(s)
- Pieterjan Lenain
- Laboratory of Food Analysis, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium.
| | - Sarah De Saeger
- Laboratory of Food Analysis, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium
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Electrochemical oxidation of chlorpheniramine at polytyramine film doped with ruthenium (II) complex: Measurement, kinetic and thermodynamic studies. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.05.029] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Ehsani A, Adeli S, Babaei F, Mostaanzadeh H, Nasrollahzadeh M. Electrochemical and optical properties of TiO2 nanoparticles/poly tyramine composite film. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2013.12.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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14
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Jackowska K, Krysinski P. New trends in the electrochemical sensing of dopamine. Anal Bioanal Chem 2012; 405:3753-71. [PMID: 23241816 PMCID: PMC3608872 DOI: 10.1007/s00216-012-6578-2] [Citation(s) in RCA: 228] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Revised: 11/12/2012] [Accepted: 11/13/2012] [Indexed: 12/11/2022]
Abstract
Since the early 70s electrochemistry has been used as a powerful analytical technique for monitoring electroactive species in living organisms. In particular, after extremely rapid evolution of new micro and nanotechnology it has been established as an invaluable technique ranging from experiments in vivo to measurement of exocytosis during communication between cells under in vitro conditions. This review highlights recent advances in the development of electrochemical sensors for selective sensing of one of the most important neurotransmitters--dopamine. Dopamine is an electroactive catecholamine neurotransmitter, abundant in the mammalian central nervous system, affecting both cognitive and behavioral functions of living organisms. We have not attempted to cover a large time-span nor to be comprehensive in presenting the vast literature devoted to electrochemical dopamine sensing. Instead, we have focused on the last five years, describing recent progress as well as showing some problems and directions for future development.
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Budnikov HC, Evtugyn GA, Porfireva AV. Electrochemical DNA sensors based on electropolymerized materials. Talanta 2012. [DOI: 10.1016/j.talanta.2012.07.027] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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A solid state sensor based polytyramine film modified electrode for the determination of dopamine and ascorbic acid in a moderately acidic solution. J Electroanal Chem (Lausanne) 2012. [DOI: 10.1016/j.jelechem.2012.04.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Rothwell SA, O'Neill RD. Effects of applied potential on the mass of non-conducting poly(ortho-phenylenediamine) electro-deposited on EQCM electrodes: comparison with biosensor selectivity parameters. Phys Chem Chem Phys 2011; 13:5413-21. [PMID: 21359356 DOI: 10.1039/c0cp02341h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An electrochemical quartz-crystal microbalance (EQCM) was used to determine the mass of poly-(o-phenylenediamine) (PoPD) layers electro-deposited at different applied potentials in neutral buffered monomer solution, conditions that produce the insulating form of the polymer used as a permselective membrane in biosensor applications. There was a systematic increase in the total, steady state PoPD mass deposited for fixed applied potentials from 0.05 to 0.6 V vs. SCE, followed by a plateau up to 0.8 V. Comparison of PoPD mass and permselectivity parameters indicates that the ability of the passivating form of PoPD to block interference species in biosensor applications is not related in a simple way to the mass of material deposited on the surface. Instead, effects of the applied electropolymerisation potential in driving the electro-oxidation of oPD dimers and oligomers formed during the electro-deposition process are likely to have a more direct impact on the selectivity characteristics of the PoPD layer. The results highlight the usefulness of apparent permeabilities, especially of ascorbic acid, in revealing differences between PoPD layers electro-deposited under different conditions.
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Affiliation(s)
- Sharon A Rothwell
- UCD School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
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Costa MICF, Steter JR, Purgato FLS, Romero JR. Catalytic Reduction of Noble Metal Salts by Sodium Hypophosphite Promoted by the Film Poly-(p-Allyl Ether Benzenesulfonic Acid). ISRN ORGANIC CHEMISTRY 2011; 2011:759817. [PMID: 24052832 PMCID: PMC3765763 DOI: 10.5402/2011/759817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2011] [Accepted: 03/06/2011] [Indexed: 11/23/2022]
Abstract
Glassy carbon electrodes were coated with the film poly-(p-allyl ether benzenesulfonic acid) by an anodic procedure. Nickel, platinum, and palladium ions were introduced into the film by ion exchange of H+
with the corresponding salts. These ions were catalytically reduced to their corresponding metals using the known electroless reducing agent sodium hypophosphite. Scanning electron microcopy and energy dispersive X-ray spectroscopy were carried out to demonstrate the occurrence of the catalytic process. To compare this method with another one carried out in our laboratory, the electrocatalytic reduction of H+ was studied using the same modified electrodes. A suggested mechanism for the catalysis is proposed.
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Affiliation(s)
- M I C F Costa
- Departamento de Química, FFCLRP-USP, Avenida dos Bandeirantes 3400, 14040-901 Ribeirão Preto, SP, Brazil
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Platinum–polytyramine composite material with improved performances for methanol oxidation. J Solid State Electrochem 2010. [DOI: 10.1007/s10008-010-1179-5] [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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21
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Abrantes L, Correia J, Melato A. An ellipsometric study of poly(3,4-ethylenedioxythiophene) electrosynthesis – from the initial stages to thick layers formation. J Electroanal Chem (Lausanne) 2010. [DOI: 10.1016/j.jelechem.2010.02.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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22
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Takmakov P, Zachek MK, Keithley RB, Walsh PL, Donley C, McCarty GS, Wightman RM. Carbon microelectrodes with a renewable surface. Anal Chem 2010; 82:2020-8. [PMID: 20146453 DOI: 10.1021/ac902753x] [Citation(s) in RCA: 163] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Electrode fouling decreases sensitivity and can be a substantial limitation in electrochemical experiments. In this work we describe an electrochemical procedure that constantly renews the surface of a carbon microelectrode using periodic triangle voltage excursions to an extended anodic potential at a scan rate of 400 V s(-1). This methodology allows for the regeneration of an electrochemically active surface and restores electrode sensitivity degraded by irreversible adsorption of chemical species. We show that repeated voltammetric sweeps to moderate potentials in aqueous solution causes oxidative etching of carbon thereby constantly renewing the electrochemically active surface. Oxidative etching was established by tracking surface-localized fluorine atoms with XPS, by monitoring changes in carbon surface morphology with AFM on pyrolyzed photoresist films, and also by optical and electron microscopy. The use of waveforms with extended anodic potentials showed substantial increases in sensitivity toward the detection of catechols. This enhancement arose from the adsorption of the catechol moiety that could be maintained with a constant regeneration of the electrode surface. We also demonstrate that application of the extended waveform could restore the sensitivity of carbon microelectrodes diminished by irreversible adsorption (electrode fouling) of byproducts resulting from the electrooxidation and polymerization of tyramine. Overall, this work brings new insight into the factors that affect electrochemical processes at carbon electrodes and provides a simple method to remove or reduce fouling problems associated with many electrochemical experiments.
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Affiliation(s)
- Pavel Takmakov
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
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Galvanostatic entrapment of penicillinase into polytyramine films and its utilization for the potentiometric determination of penicillin. SENSORS 2010; 10:2851-68. [PMID: 22319276 PMCID: PMC3274204 DOI: 10.3390/s100402851] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/02/2010] [Revised: 03/16/2010] [Accepted: 03/24/2010] [Indexed: 11/29/2022]
Abstract
A sensitive and reliable potentiometric biosensor for determination of penicillin has been developed by exploiting the self-limiting growth of the non-conducting polymer, polytyramine. Optimum polytyramine-penicillinase (PTy-PNCnase) films for potentiometric detection of penicillin were accomplished with monomer solutions which contained 0.03 M tyramine, 37 U/mL penicillinase, 0.01 M KNO3, and 3 mM penicillin with an applied current density of 0.8 mA/cm2 and an electropolymerisation time of 40 seconds. The potentiometric biosensor gave a linear concentration range of 3–283 μM for penicillin and achieved a minimum detectable concentration of 0.3 μM. The biosensor was successfully utilized for the detection of Amoxycillin and gave an average percentage recovery of 102 ± 6%. Satisfactory recoveries of penicillin G were also achieved in milk samples with the potentiometric biosensor when concentrations are ≥20 ppm.
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Keese R, M. Abrantes L, P. Correia J, M. Tenreiro A. Immobilisation of the Vitamin B12 Derivative B12-Tyramide on Electrode Surfaces. HETEROCYCLES 2010. [DOI: 10.3987/com-10-s(e)49] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Shang F, Zhou L, Mahmoud KA, Hrapovic S, Liu Y, Moynihan HA, Glennon JD, Luong JHT. Selective nanomolar detection of dopamine using a boron-doped diamond electrode modified with an electropolymerized sulfobutylether-beta-cyclodextrin-doped poly(N-acetyltyramine) and polypyrrole composite film. Anal Chem 2009; 81:4089-98. [PMID: 19382752 DOI: 10.1021/ac900368m] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
N-acetyltyramine was synthesized and electropolymerized together with a negatively charged sulfobutylether-beta-cyclodextrin on a boron-doped diamond (BDD) electrode followed by the electropolymerization of pyrrole to form a stable and permselective film for selective dopamine detection. The selectivity and sensitivity of the formed layer-by-layer film was governed by the sequence of deposition and the applied potential. Raman results showed a decrease in the peak intensity at 1329 cm(-1) (sp(3)), the main feature of BDD, upon each electrodeposition step. Such a decrease was correlated well with the change of the charge-transfer resistance derived from impedance data, i.e., reflecting the formation of the layer-by-layer film. The polycrystalline BDD surface became more even with lower surface roughness as revealed by scanning electron and atomic force microscopy. The modified BDD electrode exhibited rapid response to dopamine within 1.5-2 s and a low detection limit of 4-5 nM with excellent reproducibility. Electroactive interferences caused by 4-dihydroxyphenylalanine, 3,4-dihydroxyphenylacetic acid, ascorbic acid, and uric acid were completely eliminated, whereas the signal response of epinephrine and norepinephrine was significantly suppressed by the permselective film.
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Affiliation(s)
- Fengjun Shang
- Analytical and Biological Chemistry Research Facility, Department of Chemistry, University College Cork, Cork, Ireland
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Spătaru T, Marcu M, Banu A, Roman E, Spătaru N. Electrodeposition of platinum on polytyramine-modified electrodes for electrocatalytic applications. Electrochim Acta 2009. [DOI: 10.1016/j.electacta.2008.12.050] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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27
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Cooper SE, Venton BJ. Fast-scan cyclic voltammetry for the detection of tyramine and octopamine. Anal Bioanal Chem 2009; 394:329-36. [PMID: 19189084 DOI: 10.1007/s00216-009-2616-0] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2008] [Revised: 12/23/2008] [Accepted: 01/09/2009] [Indexed: 11/29/2022]
Abstract
Tyramine and octopamine are biogenic amine neurotransmitters in invertebrates that have functions analogous to those of the adrenergic system in vertebrates. Trace amounts of these neurotransmitters have also been identified in mammals. The purpose of this study was to develop an electrochemical method using fast-scan cyclic voltammetry at carbon-fiber microelectrodes to detect fast changes in tyramine and octopamine. Because tyramine is known to polymerize and passivate electrode surfaces, waveform parameters were optimized to prevent passivation. No fouling was observed for octopamine when the electrode was scanned from 0.1 to 1.3 V and back at 600 V/s, while a small decrease of less than 10% of the signal was seen for 15 repeated exposures to tyramine. The technique has limits of detection of 18 nM for tyramine and 30 nM for octopamine, much lower than expected levels in insects and lower than basal levels in some brain regions of mammals. Current was linear with concentration up to 5 microM. This voltammetry technique should be useful for measuring tyramine and octopamine changes in insects, such as the fruit fly, Drosophila melanogaster.
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Affiliation(s)
- Stephanie E Cooper
- Department of Chemistry, University of Virginia, P.O. Box 400319, Charlottesville, VA 22904-4319, USA
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Shang F, Liu Y, Hrapovic S, Glennon JD, Luong JHT. Selective detection of dopamine using a combined permselective film of electropolymerized (poly-tyramine and poly-pyrrole-1-propionic acid) on a boron-doped diamondelectrode. Analyst 2009; 134:519-27. [DOI: 10.1039/b814317j] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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