Benzoquinone-Mediated Biosensor for Amperometric Determination ofD-Lysine

Murthy, A. S. N.; Sharma, Jyotsna

doi:10.1002/(sici)1521-4109(199903)11:3<188::aid-elan188>3.0.co;2-4

Cited by 11 publications

(2 citation statements)

References 21 publications

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“…A benzoquinone-mediated amperometric biosensor based on d-amino acid oxidase was proposed for the assay of d-lysine [50]. The calibration graphs of the sensor response at 150 mV were linear in the concentration range between 10 and 1 mmol/L of d-lysine.…”

Section: D-lysinementioning

confidence: 99%

Enantioselective Electrochemical Sensors

2002

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The discrimination between enantiomers is becoming one of the most important fields of modern analytical chemistry, especially for pharmaceutical products, clinical analysis, and food analysis. The introduction of enantioselective electrochemical sensors in enantioanalysis increases the reliability of the measurements. Three types of enantioselective electrochemical sensors are proposed for enantioselective analysis: potentiometric, enantioselective electrodes, amperometric immunosensors, and amperometric biosensors. The principle of enantiomer recognition is the same for all types of proposed electrochemical sensors: to find a lock for the key, where the key is the enantiomer, and the lock is a molecule with a special architecture, an antibody, or an enzyme.

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Section: D-lysinementioning

confidence: 99%

Enantioselective Electrochemical Sensors

2002

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“…Usually, they are used freely in solution, but this hinders their application in vivo and potential toxicity risks exist [ 27 ]. Therefore, mediators immobilized on the enzyme surface have been explored, such as quinone derivatives [ 37 , 38 ], ferrocene derivatives [ 39 ] and gold nanoparticles [ 40 , 41 ] among others [ 42 , 43 , 44 , 45 ]. For more detail about GOx reengineering aiming to increase the rate of electron transfer to the electrode surface refer to [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Response of Glucose Oxidase Adsorbed on Laser-Induced Graphene

et al. 2021

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Carbon-based electrodes have demonstrated great promise as electrochemical transducers in the development of biosensors. More recently, laser-induced graphene (LIG), a graphene derivative, appears as a great candidate due to its superior electron transfer characteristics, high surface area and simplicity in its synthesis. The continuous interest in the development of cost-effective, more stable and reliable biosensors for glucose detection make them the most studied and explored within the academic and industry community. In this work, the electrochemistry of glucose oxidase (GOx) adsorbed on LIG electrodes is studied in detail. In addition to the well-known electroactivity of free flavin adenine dinucleotide (FAD), the cofactor of GOx, at the expected half-wave potential of −0.490 V vs. Ag/AgCl (1 M KCl), a new well-defined redox pair at 0.155 V is observed and shown to be related to LIG/GOx interaction. A systematic study was undertaken in order to understand the origin of this activity, including scan rate and pH dependence, along with glucose detection tests. Two protons and two electrons are involved in this reaction, which is shown to be sensitive to the concentration of glucose, restraining its origin to the electron transfer from FAD in the active site of GOx to the electrode via direct or mediated by quinone derivatives acting as mediators.

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Disposable Glucose Sensors for Flow Injection Analysis Using Substituted 1,4‐Benzoquinone Mediators

et al. 2003

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The redox chemistry of several substituted benzoquinones was investigated by cyclic voltammetry at a glassy carbon electrode and candidates for inclusion in a mediated biosensor for use in flow analysis were selected on the basis of oxidation potential, electrochemical reversibility and solubility. Glucose sensors constructed by sequential deposition onto a carbon pellet of 2,6-dimethyl-1,4-benzoquinone, 2,3,5,6-tetramethyl-1,4-benzoquinone or phenyl-1,4-benzoquinone mediator solution, followed by glucose oxidase in polyvinylalcohol-Nafion solution, were tested for response to glucose using flow injection analysis. Sensors prepared from 2,6-dimethyl-1,4-benzoquinone gave highest sensitivity, with a linear range of response to glucose of 2.5 ± 40 mM. The use of an enzyme-free comparative electrode to eliminate the response from interferents was investigated.

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Benzoquinone-Mediated Biosensor for Amperometric Determination ofD-Lysine

Cited by 11 publications

References 21 publications

Enantioselective Electrochemical Sensors

Enantioselective Electrochemical Sensors

Electrochemical Response of Glucose Oxidase Adsorbed on Laser-Induced Graphene

Disposable Glucose Sensors for Flow Injection Analysis Using Substituted 1,4‐Benzoquinone Mediators

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