A new flow-injection determination of glucose based on the redox reaction of hydroquinone with iron(III) in the presence of 1,10-phenanthroline

Katsumata, Hideyuki; Sekine, Tomomi; Teshima, Norio; Kurihara, Makoto; Kawashima, Takuji

doi:10.1016/s0039-9140(00)00313-1

Cited by 10 publications

(4 citation statements)

References 23 publications

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“…The method is based on the following reaction The H 2 O 2 generated from this reaction is measured by many analytical methods, for example, spectrophotometry, fluorimetry, CL, , and electrochemical , techniques. Soluble glucose oxidase has a broad pH profile with a reported optimum at pH 5.6 .…”

Section: Resultsmentioning

confidence: 99%

Luminol Chemiluminescence in Unbuffered Solutions with a Cobalt(II)−Ethanolamine Complex Immobilized on Resin as Catalyst and Its Application to Analysis

et al. 2001

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Using a heterogeneous catalyst, Co(II)-ethanolamine complex sorbed on Dowex-50W resin, the chemiluminescence (CL) of luminol in unbuffered or weakly acidic solution was studied in the presence of H2O2. The maximum luminol CL wavelength at pH 5.7 was 448 nm, 23 nm longer than that in a basic solution (pH 10.5). Three different ligands, mono-, di-, and triethanolamine, and six transition metal ions, Co(II), Cu(II), Ni(II), Mn-(II), Fe(II), and Fe(III) were compared by CL measurements. The CL intensity decreased in the order mono- > di- > triethanolamine and Co(II) > Cu(II) > Ni(II) > Fe-(III) > Mn(II) > Fe(II). This heterogeneous CL system was developed as H2O2 and glucose flow-through sensors. Detection limits (S/N = 3) of H2O2 and glucose using Dowex-50W-X4-Co(II)-monoethanolamine as catalyst are 1 x 10(-7) M and 1 x 10(-6) M, respectively. On the basis of the studies of the CL, fluorescence, UV-vis and ESCA spectra and the effect of dissolved oxygen in luminol solution, a mechanism for CL emission in unbuffered solution was considered as the formation of a superoxide radical ion during the decomposition of H2O2 catalyzed by the Co(II)-ethanolamine immobilized resin. Then the superoxide radical ion acted on luminol and the CL was emitted. The applications of the proposed method to determine H2O2 in rainwater without any special pretreatment and glucose in human urine and orange juice samples give satisfactory results.

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Section: Resultsmentioning

confidence: 99%

Luminol Chemiluminescence in Unbuffered Solutions with a Cobalt(II)−Ethanolamine Complex Immobilized on Resin as Catalyst and Its Application to Analysis

et al. 2001

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“…In addition, GOD adsorbed directly on the electrode surface could lose its electrochemical activities and bioactivities due to its denaturation. To monitor the glucose through detecting a signal aroused by catalytic reaction of GOD for glucose, many methods have been developed, including electrochemistry [1 -3], photometry [4,5], chemiluminescence, electrochemiluminescence [6,7], and flow injection analysis [8]. Among these electrochemical methods, especially amperometric biosensors are a simple and convenient technique.…”

Section: Introductionmentioning

confidence: 99%

Unadulterated Glucose Biosensor Based on Direct Electron Transfer of Glucose Oxidase Encapsulated Chitosan Modified Glassy Carbon Electrode

et al. 2008

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Glucose oxidase (GOD) was encapsulated in chitosan matrix and immobilized on a glassy carbon electrode, achieving direct electron transfer (DET) reaction between GOD and electrode without any nano-material. On basis of such DET, a novel glucose biosensor was fabricated for direct bioelectrochemical sensing without any electron-mediator. GOD incorporated in chitosan films gave a pair of stable, well-defined, and quasireversible cyclic voltammetric peaks at about À 0.284 (E pa ) and À 0.338 V (E pc ) vs. Ag/AgCl electrode in phosphate buffers. And the peak is located at the potentials characteristic of FAD redox couples of the proteins. The electrochemical parameters, such as midpoint potential (E 1/2 ) and apparent heterogeneous electron-transfer rate constants (k s ) were estimated to À 0.311 V and 1.79 s À1 by voltammetry, respectively. Experimental results indicate that the encapsulated GOD retains its catalytic activity for the oxidation of glucose. Such a GOD encapsulated chitosan based biosensor revealed a relatively rapid response time of less than 2 min, and a sufficient linear detection range for glucose concentration, from 0.60 to 2.80 mmol L À1 with a detection limit of 0.10 mmol L À1 and electrode sensitivity of 0.233 mA mmol À1. The relative standard deviation (RSD) is under 3.2% (n ¼ 7) for the determination of practical serum samples. The biologic compounds probably existed in the sample, such as ascorbic acid, uric acid, dopamine, and epinephrine, do not affect the determination of glucose. The proposed method is satisfactory to the determination of human serum samples compared with the routine hexokinase method. Both the unique electrical property and biocompatibility of chitosan enable the construction of a good bio-sensing platform for achieved DET of GOD and developed the third-generation glucose biosensors.

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“…S1 in the ESI† for more details). 61 The reduced Fe( ii ) was expected to be chelated in the presence of 1,10-phenanthroline to form the Fe( ii )–phenanthroline complex ( λ max = 512 nm). In the reaction solution of the standard Fe( iii ) system, an obvious absorbance of 0.444 was observed at λ max = 512 nm (Table 6, entry 1).…”

Section: Resultsmentioning

confidence: 99%

Disarming the alkoxide trap to access a practical FeCl₃ system for borrowing-hydrogen N-alkylation

Yang

et al. 2022

Org. Chem. Front.

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A new flow-injection determination of glucose based on the redox reaction of hydroquinone with iron(III) in the presence of 1,10-phenanthroline

Cited by 10 publications

References 23 publications

Luminol Chemiluminescence in Unbuffered Solutions with a Cobalt(II)−Ethanolamine Complex Immobilized on Resin as Catalyst and Its Application to Analysis

Luminol Chemiluminescence in Unbuffered Solutions with a Cobalt(II)−Ethanolamine Complex Immobilized on Resin as Catalyst and Its Application to Analysis

Unadulterated Glucose Biosensor Based on Direct Electron Transfer of Glucose Oxidase Encapsulated Chitosan Modified Glassy Carbon Electrode

Disarming the alkoxide trap to access a practical FeCl₃ system for borrowing-hydrogen N-alkylation

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A new flow-injection determination of glucose based on the redox reaction of hydroquinone with iron(III) in the presence of 1,10-phenanthroline

Cited by 10 publications

References 23 publications

Luminol Chemiluminescence in Unbuffered Solutions with a Cobalt(II)−Ethanolamine Complex Immobilized on Resin as Catalyst and Its Application to Analysis

Luminol Chemiluminescence in Unbuffered Solutions with a Cobalt(II)−Ethanolamine Complex Immobilized on Resin as Catalyst and Its Application to Analysis

Unadulterated Glucose Biosensor Based on Direct Electron Transfer of Glucose Oxidase Encapsulated Chitosan Modified Glassy Carbon Electrode

Disarming the alkoxide trap to access a practical FeCl3 system for borrowing-hydrogen N-alkylation

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Disarming the alkoxide trap to access a practical FeCl₃ system for borrowing-hydrogen N-alkylation