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Song J, Wan Y, Yang C, Deng Q, Cui Y, Yan Z, Liu Y. Synthesis of Cu xO/Ag nanoparticles on exfoliated graphene: application for enhanced electrochemical detection of H 2O 2 in milk. Sci Rep 2023; 13:6640. [PMID: 37095263 PMCID: PMC10126113 DOI: 10.1038/s41598-023-33661-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Accepted: 04/17/2023] [Indexed: 04/26/2023] Open
Abstract
In this paper, a novel composite is constructed as a non-enzymatic hydrogen peroxide (H2O2) sensor by liquid-phase exfoliation method, which is composed of copper oxide, cuprous oxide and silver nanoparticles doped few-layer-graphene (CuxO/Ag@FLG). Its surface morphology and composition were characterized by scanning electron microscopy (SEM) and X-ray photo spectroscopy (XPS), and its H2O2 sensing performances include catalytic reduction and quantitative detection were studied with electrochemical methods. Our sensor had a high sensitivity of 174.5 μA mM-1 cm-2 (R2 = 0.9978) in an extremely wide range of concentrations from 10 μM to 100 mM, a fast response (about 5 s) and a low limit of detection (S/N = 3) of 2.13 μM. The sensor exhibits outstanding selectivity in the presence of various biological interference, such as dopamine, ascorbic acid, uric acid, citric acid, etc. In addition, the constructed sensor continued 95% current responsiveness after 1 month of storage further points to its long-term stability. Last but not least, it has a good recovery rate (90.12-102.00%) in milk sold on the open market, indicating that it has broad application possibilities in the food industry and biological medicine.
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Affiliation(s)
- Jie Song
- School of Pharmaceutical and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan, 528400, China
| | - Yating Wan
- School of Pharmaceutical and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan, 528400, China
| | - Chen Yang
- School of Pharmaceutical and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan, 528400, China
| | - Qiuju Deng
- School of Pharmaceutical and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan, 528400, China
| | - Yingde Cui
- Guangzhou Vocational University of Science and Technology, Guangzhou, 510555, China.
| | - Zhihong Yan
- College of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510000, China.
| | - Yi Liu
- School of Pharmaceutical and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan, 528400, China.
- College of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510000, China.
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems and Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, The Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, 510006, Guangdong, China.
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Atta NF, Galal A, El-Said DM. Electrochemical sensor based on incorporation of gold nanoparticles, ionic liquid crystal, and β-cyclodextrin into carbon paste composite for ultra-sensitive determination of norepinephrine in real samples. CAN J CHEM 2019. [DOI: 10.1139/cjc-2019-0025] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A novel, reliable electrochemical sensor is fabricated for direct and sensitive determination of norepinephrine (NE) based on gold nanoparticles, ionic liquid crystal, and β-cyclodextrin modified carbon paste electrode, namely AuILCCDCPE. The ionic liquid crystal (ILC) played a key role in improving the current response of electro-oxidation of NE compared with other ionic liquids modified electrodes. The ILC increased the ionic conductivity of the paste and formed noncovalent interactions with both host (CD) and guest (NE) compounds. The solid state structure of the ILC helped in the formation of ordered films in the paste. Furthermore, CD and Au nanoparticles raised the stability and the electrocatalytic ability of the proposed sensor. Under optimized conditions, the fabricated electrochemical sensor showed a good electrochemical response towards NE in human urine in the linear dynamic ranges of 0.05–10 μmol/L and 20–300 μmol/L with a correlation coefficient of 0.999 and detection limit of 3.12 × 10−9 mol/L in the low concentration range. The practical analytical performance of the sensor was attained for determination of NE in real samples with satisfied recovery results. This sensor has great ability to be extended for electrochemical applications in assays of other drugs.
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Affiliation(s)
- Nada F. Atta
- Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt
- Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Ahmed Galal
- Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt
- Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Dalia M. El-Said
- Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt
- Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt
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Yuan J, Xu S, Zeng HY, Cao X, Dan Pan A, Xiao GF, Ding PX. Hydrogen peroxide biosensor based on chitosan/2D layered double hydroxide composite for the determination of H2O2. Bioelectrochemistry 2018; 123:94-102. [DOI: 10.1016/j.bioelechem.2018.04.009] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Revised: 04/17/2018] [Accepted: 04/17/2018] [Indexed: 11/26/2022]
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4
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Sahin OG. Microwave-assisted synthesis of PtAu@C based bimetallic nanocatalysts for non-enzymatic H2O2 sensor. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.09.015] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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5
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Li Y, Lv X, Wu D, Ma H, Feng R, Wang Y, Du B, Wei Q. Screen Printed Biosensor for Hydrogen Peroxide Based on Prussian Blue Modified Hydroxyapatite. J Inorg Organomet Polym Mater 2013. [DOI: 10.1007/s10904-013-9869-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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6
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Li ZH, Guedri H, Viguier B, Sun SG, Marty JL. Optimization of hydrogen peroxide detection for a methyl mercaptan biosensor. SENSORS 2013; 13:5028-39. [PMID: 23591963 PMCID: PMC3673124 DOI: 10.3390/s130405028] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 04/03/2013] [Accepted: 04/07/2013] [Indexed: 11/24/2022]
Abstract
Several kinds of modified carbon screen printed electrodes (CSPEs) for amperometric detection of hydrogen peroxide (H2O2) are presented in order to propose a methyl mercaptan (MM) biosensor. Unmodified, carbon nanotubes (CNTs), cobalt phthalocyanine (CoPC), Prussian blue (PB), and Os-wired HRP modified CSPE sensors were fabricated and tested to detect H2O2, applying a potential of +0.6 V, +0.6 V, +0.4 V, −0.2 V and −0.1 V (versus Ag/AgCl), respectively. The limits of detection of these electrodes for H2O2 were 3.1 μM, 1.3 μM, 71 nM, 1.3 μM, 13.7 nM, respectively. The results demonstrated that the Os-wired HRP modified CSPEs gives the lowest limit of detection (LOD) for H2O2 at a working potential as low as −0.1 V. Os-wired HRP is the optimum choice for establishment of a MM biosensor and gives a detection limit of 0.5 μM.
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Affiliation(s)
- Zhan-Hong Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China; E-Mails: (Z.-H.L.); (S.-G.S.)
- Laboratoire IMAGES EA 4218, Groupe Biocapteurs, Université de Perpignan Via Domitia (UPVD), Bâtiment S, 52 av Paul Alduy 66860 Perpignan Cedex, France; E-Mails: (H.G.); (B.V.)
| | - Houssemeddine Guedri
- Laboratoire IMAGES EA 4218, Groupe Biocapteurs, Université de Perpignan Via Domitia (UPVD), Bâtiment S, 52 av Paul Alduy 66860 Perpignan Cedex, France; E-Mails: (H.G.); (B.V.)
| | - Bruno Viguier
- Laboratoire IMAGES EA 4218, Groupe Biocapteurs, Université de Perpignan Via Domitia (UPVD), Bâtiment S, 52 av Paul Alduy 66860 Perpignan Cedex, France; E-Mails: (H.G.); (B.V.)
| | - Shi-Gang Sun
- State Key Laboratory of Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China; E-Mails: (Z.-H.L.); (S.-G.S.)
| | - Jean-Louis Marty
- Laboratoire IMAGES EA 4218, Groupe Biocapteurs, Université de Perpignan Via Domitia (UPVD), Bâtiment S, 52 av Paul Alduy 66860 Perpignan Cedex, France; E-Mails: (H.G.); (B.V.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +33-4-6866-2254; Fax: +33-4-6866-2223
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Amjadi M, Rahimpour E. Silver nanoparticles plasmon resonance-based method for the determination of uric acid in human plasma and urine samples. Mikrochim Acta 2012. [DOI: 10.1007/s00604-012-0849-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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8
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References. Anal Chem 2012. [DOI: 10.1201/b11478-14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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9
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Creanga C, El Murr N. Kinetic study for implementation of a disposable “redox-flexible” glucose biosensor. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.02.055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Geng R, Zhao G, Liu M, Li M. A sandwich structured SiO2/cytochrome c/SiO2 on a boron-doped diamond film electrode as an electrochemical nitrite biosensor. Biomaterials 2008; 29:2794-801. [DOI: 10.1016/j.biomaterials.2008.03.004] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2008] [Accepted: 03/04/2008] [Indexed: 11/29/2022]
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12
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Leite OD, Fatibello‐Filho O, Vieira HJ, Rocha FRP, Miranda Cury NSD. A Multicommuted Flow‐based System for Hydrogen Peroxide Determination by Chemiluminescence Detection Using a Photodiode. ANAL LETT 2007. [DOI: 10.1080/00032710701603876] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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Hartwell SK, Pathanon K, Fongmoon D, Kongtawelert P, Grudpan K. Exploiting flow injection system with mini-immunoaffinity chromatographic column for chondroitin sulfate proteoglycans assay. Anal Bioanal Chem 2007; 388:1839-46. [PMID: 17579847 DOI: 10.1007/s00216-007-1361-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2007] [Revised: 05/08/2007] [Accepted: 05/10/2007] [Indexed: 10/23/2022]
Abstract
A flow injection (FI) system with a mini-immunoaffinity chromatographic column was used to perform on-line assays of specific proteoglycans. The 300-microL mini-column contained beads coupled with monoclonal antibodies against the specific sulfation pattern of chondroitin sulfate proteoglycans, which have been reported to be a potential biomarker for cancer. The amount of these proteoglycans present was estimated indirectly from their protein content using the Bradford assay, which is an alternative to a direct carbohydrate assay. The system developed was tested by assaying for chondroitin sulfate proteoglycans in sera from patients with various cancers and comparing the results to those obtained for sera from healthy people. The results indicated that this approach could be used as a cost-effective alternative system for determining the amount of these specific biomarker proteoglycans. The column could be reused at least 90 times, with each run consisting of 200 microL of serum sample diluted twofold; an analysis rate of 30 min per run was achieved, as compared to 4 h for a batch procedure.
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Affiliation(s)
- Supaporn Kradtap Hartwell
- Department of Chemistry, Faculty of Science and Institute for Science and Technology Research and Development, Chiang Mai University, Chiang Mai, 50200, Thailand.
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Konash A, Magner E. Characterization of an organic phase peroxide biosensor based on horseradish peroxidase immobilized in Eastman AQ. Biosens Bioelectron 2006; 22:116-23. [PMID: 16469491 DOI: 10.1016/j.bios.2005.12.010] [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: 10/07/2005] [Revised: 12/02/2005] [Accepted: 12/07/2005] [Indexed: 11/26/2022]
Abstract
Due to their frequent occurrence in food, cosmetics and pharmaceutical products, and their poor solubility in water, the detection of peroxides in organic solvents has aroused significant interest. For diagnostics or on-site testing, a fast and specific experimental approach is required. Although aqueous peroxide biosensors are well known, they are usually not suitable for nonaqueous applications due to their instability. Here we describe an organic phase biosensor for hydrogen peroxide based on horseradish peroxidase immobilized in an Eastman AQ 55 polymer matrix. Rotating disc amperometry was used to examine the effect of the solvent properties, the amount and pH of added buffer, the concentration of peroxide and ferrocene dimethanol, and the amount of Eastman AQ 55 and of enzyme on the response of the biosensor to hydrogen peroxide. The response of the biosensor was limited by diffusion. Linear responses (with detection limits to hydrogen peroxide given in parentheses) were obtained in methanol (1.2 microM), ethanol (0.6 microM), 1-propanol (2.8 microM), acetone (1.4 microM), acetonitrile (2.6 microM), and ethylene glycol (13.6 microM). The rate of diffusion of ferrocene dimethanol was more constrained than the rate of diffusion of hydrogen peroxide, resulting in a comparatively narrow linear range. The main advantages of the sensor are its ease of use and a high degree of reproducibility, together with good operational and storage stability.
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Affiliation(s)
- Anastassija Konash
- Material and Surface Science Institute and Department of Chemical and Environmental Science, University of Limerick, Limerick, Ireland
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15
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Hamdi N, Wang J, Monbouquette HG. Polymer films as permselective coatings for H2O2-sensing electrodes. J Electroanal Chem (Lausanne) 2005. [DOI: 10.1016/j.jelechem.2005.04.028] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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16
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Gajovic-Eichelmann N, Bier F. Novel Electrochemical Assay for H2O2 Determination in Aqueous Solutions: A Non Time-Critical Method for H2O2 Trace Level Detection. ELECTROANAL 2005. [DOI: 10.1002/elan.200403212] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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17
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Du Y, Yan J, Zhou W, Yang X, Wang E. Direct electrochemical detection of glucose in human plasma on capillary electrophoresis microchips. Electrophoresis 2004; 25:3853-9. [PMID: 15565683 DOI: 10.1002/elps.200406072] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We developed an electrochemical detector on a hybrid chip for the determination of glucose in human plasma. The microchip system described in this paper consists of a poly(dimethylsiloxane) (PDMS) layer containing separation and injection channels and an electrode plate. The copper microelectrode is fabricated by selective electroless deposition. The fabrication of the decoupler is performed by platinum electrochemical deposition on the metal film formed by electroless deposition. Factors influencing the performance, including detection potential, separation field strength, and buffer concentration, were studied. The electrodes exhibited good stability and durability in the analytical procedures. Under optimized detection conditions, glucose responded linearly from 10 microM to 1 mM. Finally, glucose in human plasma from three healthy individuals and two diabetics was successfully determined, giving a good prospect for a new clinical diagnostic instrument.
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Affiliation(s)
- Yan Du
- College of Chemistry, Jilin University, Changchun, China
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18
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Takagi K, Shikata S. Flow injection determination of histamine with a histamine dehydrogenase-based electrode. Anal Chim Acta 2004. [DOI: 10.1016/j.aca.2003.10.063] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Wang CY, Huang HJ. Flow injection analysis of glucose based on its inhibition of electrochemiluminescence in a Ru(bpy)32+–tripropylamine system. Anal Chim Acta 2003. [DOI: 10.1016/j.aca.2003.08.064] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Li J, Dasgupta PK, Li G, Motomizu S. Silver-Induced Enhancement of Thiochrome-Based Peroxide Measurements. Anal Chem 2003; 75:6753-8. [PMID: 14640758 DOI: 10.1021/ac0349126] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Thiamine is presently one of the most attractive substrates used for sensitive fluorometric measurements of peroxides. Thiochrome (TC), a highly fluorescent product, is formed in enzyme-mediated oxidations. It is assumed that H(2)O(2) is nearly quantitatively converted to TC. The reaction cannot differentiate H(2)O(2) from many other peroxides such as methylhydroperoxide (MHP); to perform differential measurements, H(2)O(2) can first be selectively destroyed by a suitable catalyst such as MnO(2). In substituting Ag(2)O for MnO(2) to accomplish the selective destruction of H(2)O(2), we achieved the stated objective but were puzzled by a 3-fold increase in the MHP response in the presence of Ag(2)O. It was soon discovered that traces of dissolved Ag(+) and Hg(2+) can dramatically increase the yield of TC in this reaction from either H(2)O(2) or MHP; the normal yield in fact is only 20%. We present here a reaction scheme and kinetic model that adequately describes this behavior and should provide a path to substantially increase the sensitivity of this important assay method.
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Tkac J, Vostiar I, Gorton L, Gemeiner P, Sturdik E. Improved selectivity of microbial biosensor using membrane coating. Application to the analysis of ethanol during fermentation. Biosens Bioelectron 2003; 18:1125-34. [PMID: 12788555 DOI: 10.1016/s0956-5663(02)00244-0] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
A ferricyanide mediated microbial biosensor for ethanol detection was prepared by surface modification of a glassy carbon electrode. The selectivity of the whole Gluconobacter oxydans cell biosensor for ethanol determination was greatly enhanced by the size exclusion effect of a cellulose acetate (CA) membrane. The use of a CA membrane increased the ethanol to glucose sensitivity ratio by a factor of 58.2 and even the ethanol to glycerol sensitivity ratio by a factor of 7.5 compared with the use of a dialysis membrane. The biosensor provides rapid and sensitive detection of ethanol with a limit of detection of 0.85 microM (S/N=3). The selectivity of the biosensor toward alcohols was better compared to previously published enzyme biosensors based on alcohol oxidase or alcohol dehydrogenases. The biosensor was successfully used in an off-line monitoring of ethanol during batch fermentation by immobilized Saccharomyces cerevisiae cells with an initial glucose concentration of 200 g l(-1).
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Affiliation(s)
- Jan Tkac
- Institute of Chemistry, Slovak Academy of Sciences, Dubravska cesta 9, SK-842 38, Bratislava, Slovak Republic.
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KANO K, IKEDA T. Bioelectrocatalysis, Powerful Means of Connecting Electrochemistry to Biochemistry and Biotechnology. ELECTROCHEMISTRY 2003. [DOI: 10.5796/electrochemistry.71.86] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Kenji KANO
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
| | - Tokuji IKEDA
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
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Han X, Huang W, Jia J, Dong S, Wang E. Direct electrochemistry of hemoglobin in egg-phosphatidylcholine films and its catalysis to H(2)O(2). Biosens Bioelectron 2002; 17:741-6. [PMID: 12191922 DOI: 10.1016/s0956-5663(02)00052-0] [Citation(s) in RCA: 104] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Direct electrochemistry of hemoglobin was observed in stable thin film composed of a natural lipid (egg-phosphatidylcholine) and hemoglobin on pyrolytic graphite (PG) electrode. Hemoglobin in lipid films shows thin layer electrochemistry behavior. The formal potential E degrees ' of hemoglobin in the lipid film was linearly varied with pH in the range from 3.5 to 7.0 with a slope of -46.4 mV pH(-1). Hemoglobin in the lipid film exhibited elegant catalytic activity for electrochemical reduction of H(2)O(2), based which a unmediated biosensor for H(2)O(2) was developed.
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Affiliation(s)
- Xiaojun Han
- Laboratory of Electroanalytical Chemistry and National Analytical Research Center of Electrochemistry and Spectroscopy, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, People's Republic of China
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Matsumoto R, Mochizuki M, Kano K, Ikeda T. Unusual response in mediated biosensors with an oxidase/peroxidase bienzyme system. Anal Chem 2002; 74:3297-303. [PMID: 12139032 DOI: 10.1021/ac015684n] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Mediated biosensors consisting of an oxidase and peroxidase (POx) have attracted increasing attention because of their wide applicability. However, since most of oxidases utilize artificial electron acceptors in place of dioxygen, the competition between O2 and the electron acceptor in the mediated sensors is anticipated. This has been evidenced with a glucose oxidase (GOx)- and POx-coentrapped and ferrocene-embedded carbon paste electrode, which exhibits peak-shaped current-time curves at increased concentrations of glucose and also gives a peak-shaped calibration curve. Digital simulation has been applied to clarify the cause of such unusual responses, by taking into account the ping-pong enzyme kinetics on two- and three-substrate models for POx and GOx, respectively. The simulation has well reproduced such unusual responses and has clearly revealed that the depletion of O2 in the enzyme layer is the most important factor responsible for such unusual responses. To overcome such a drawback of oxidase/POx bienzyme sensors, it is expected to be essential to decrease the rate of the oxidase reaction. In contrast, increase in the POx activity is useful to improve the sensitivity. According to the simulation-based expectation, the GOx and POx concentrations in the bienzyme sensor are adjusted to exhibit normal behavior with high sensitivity.
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Affiliation(s)
- Ryuhei Matsumoto
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Japan
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Development of an interference-free chemiluminescence method for monitoring acetylcholine and choline based on immobilized enzymes. Anal Chim Acta 2002. [DOI: 10.1016/s0003-2670(02)00336-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Determination of hydrogen peroxide by using a flow injection system with immobilized peroxidase and long pathlength capillary spectrophotometry. Anal Chim Acta 2002. [DOI: 10.1016/s0003-2670(01)01600-2] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Mochizuki M, Yamazaki SI, Kano K, Ikeda T. Kinetic analysis and mechanistic aspects of autoxidation of catechins. BIOCHIMICA ET BIOPHYSICA ACTA 2002; 1569:35-44. [PMID: 11853955 DOI: 10.1016/s0304-4165(01)00230-6] [Citation(s) in RCA: 237] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A peroxidase-based bioelectrochemical sensor of hydrogen peroxide (H(2)O(2)) and a Clark-type oxygen electrode were applied to continuous monitoring and kinetic analysis of the autoxidation of catechins. Four major catechins in green tea, (-)-epicatechin, (-)-epicatechin gallate, (-)-epigallocatechin, and (-)-epigallocatechin gallate, were used as model compounds. It was found that dioxygen (O(2)) is quantitatively reduced to H(2)O(2). The initial rate of autoxidation is suppressed by superoxide dismutase and H(+), but is independent of buffer capacity. Based on these results, a mechanism of autoxidation is proposed; the initial step is the one-electron oxidation of the B ring of catechins by O(2) to generate a superoxide anion (O(2)(*-)) and a semiquinone radical, as supported in part by electron spin resonance measurements. O(2)(*-) works as a stronger one-electron oxidant than O(2) against catechins and is reduced to H(2)O(2). The semiquinone radical is more susceptible to oxidation with O(2) than fully reduced catechins. The autoxidation rate increases with pH. This behavior can be interpreted in terms of the increase in the stability of O(2)(*-) and the semiquinone radical with increasing pH, rather than the acid dissociation of phenolic groups. Cupric ion enhances autoxidation; most probably it functions as a catalyst of the initial oxidation step of catechins. The product cuprous ion can trigger a Fenton reaction to generate hydroxyl radical. On the other hand, borate ion suppresses autoxidation drastically, due to the strong complex formation with catechins. The biological significance of autoxidation and its effectors are also discussed.
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Affiliation(s)
- Manabu Mochizuki
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo, Kyoto 606-8502, Japan
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Tkáč J, Voštiar I, Šturdı́k E, Gemeiner P, Mastihuba V, Annus J. Fructose biosensor based on d-fructose dehydrogenase immobilised on a ferrocene-embedded cellulose acetate membrane. Anal Chim Acta 2001. [DOI: 10.1016/s0003-2670(01)01021-2] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ikeda T, Kano K. An electrochemical approach to the studies of biological redox reactions and their applications to biosensors, bioreactors, and biofuel cells. J Biosci Bioeng 2001. [DOI: 10.1016/s1389-1723(01)80191-2] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Affiliation(s)
- Kenji KANO
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
| | - Tokuji IKEDA
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
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