Sol–gel derived metal dispersed ceramic–graphite composite electrode for amperometric determination of dopamine

Shankaran, Dhesingh Ravi; Uehara, Nobuo; Kato, Takeshi

doi:10.1016/s0003-2670(02)01511-8

Cited by 51 publications

(20 citation statements)

References 32 publications

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“…Some other components can be added into bulk of the electrode materials to achieve desired properties, e.g., cobalt phthalocyanine [133], Cu 2 O [126], Ni/Cu [134], hexacyanoferrate [135], manganese [135], methylene blue [136], [Ru (tpy)(bpy)Cl]PF 6 [137], or their mixtures [135]. Surface of these electrodes can be also modified, e.g., by Nafion [138,139] or by a catalyzer (e.g., tyrosinase [140], Au-Pd [124], RuO 2 [124], silica gel [124,141,142]). …”

Section: Solid Composite Electrodesmentioning

confidence: 99%

Nontraditional Electrode Materials in Environmental Analysis of Biologically Active Organic Compounds

et al. 2007

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This review describes recent results regarding voltammetric and amperometric determination of submicromolar concentrations of various environmentally important biologically active organic substances using nontraditional types of electrodes either in batch analysis or in flow liquid systems (especially HPLC or FIA with electrochemical detection). Attention is paid to solid amalgam electrodes (environmentally friendly alternatives to mercury electrodes), to carbon paste electrodes with easily renewable surface, to boron doped diamond film electrodes with very low noise and broad potential window, and to inexpensive solid composite electrodes with high signal-to-noise ratio, compatibility with organic solvents and easy mechanical or electrochemical pretreatment. The review concentrates on our own results in the context of the general development in the filed.

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Section: Solid Composite Electrodesmentioning

confidence: 99%

Nontraditional Electrode Materials in Environmental Analysis of Biologically Active Organic Compounds

et al. 2007

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“…The possible reason may be because of the increased exposed surface area of the composite due to the incomplete binding of the graphite powder at low amount of ormosil. On the other hand, the reduced conductivity of the ceramic graphite composite because of excess of non-conducting ormosil gel and increased hydrophobicity are the possible reasons for higher background current in the latter case [38,39].…”

Section: Electrochemical Behavior Of Fe/ccementioning

confidence: 99%

“…As a matter of fact, the use of functional silane compounds favors good control of the overall immobilization process, selective modification and the orientation and distribution of the catalysts [30 ± 37]. In this context, we have demonstrated recently, that the construction of sol-gel derived ceramic composite electrodes containing dispersed metal ions such as copper or silver [38,39].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Sensor for Sulfite and Sulfur Dioxide Based on 3‐Aminopropyltrimethoxysilane Derived Sol‐Gel Composite Electrode

2004

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A new sol-gel derived composite sensor has been developed for the determination of sulfite and sulfur dioxide using 3-aminopropyltrimethoxysilane, ferrous sulfate and graphite powder by sol-gel process. Cyclic voltammetry and amperometry studies revealed that the modified iron dispersed sol-gel derived ceramic composite electrode exhibited excellent characteristics for the electrocatalytic oxidation of sulfite at a reduced potential of 0.35 V with good sensitivity and selectivity. The pH and the potential for sulfite estimation have been optimized. The sensor exhibited rapid and linear response to sulfite in the concentration range from 0.73 mg/L to 95.42 mg/L with a correlation coefficient of 0.997. The proposed sensor can be utilized for the determination sulfur dioxide after absorbing in a suitable medium and has promising characteristics such as, rapid response, good reproducibility and remarkable stability.

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“…7 On the other hand silver dispersed ceramic-graphite electrode showed good stability when 3-mercaptopropyltrimethoxysilane precursor was used. 8 Some researchers have employed mediator bonded to GOx. 9 However, the mediator chemically immobilized to GOx lost activity of enzyme by about 25%-75%.…”

Section: Introductionmentioning

confidence: 99%

Ferrocene Derivative Mediator Bonded Sol‐gel Membrane Glucose Biosensor

et al. 2006

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The sol-gel derived glucose biosensor was developed, and the sol-gel membrane was organically modified by N-(3-triethoxysilylpropyl)-ferrocenylmethylamine (FcSi) as sol-gel precursor to make electrochemical biosensor. The structure of biosensor was sol-gel/FcSi＋GOx/GC type (glucose oxidase, GOx). The ferrocene mediator was chemically immobilized to the silane network, and GOx was entrapped to the sol-gel glass network. Therefore, these structures prevented mediator leakage and retained the enzyme activity. Additionally, pH of electrolyte, temperature effects, and interference of positive substances with biosensor were investigated. And the electrochemical performance of biosensor was studied by amperometry. The results indicated that the linear range, detection limit, and response slope of biosensor was 2.00×10

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Sol–gel derived metal dispersed ceramic–graphite composite electrode for amperometric determination of dopamine

Cited by 51 publications

References 32 publications

Nontraditional Electrode Materials in Environmental Analysis of Biologically Active Organic Compounds

Nontraditional Electrode Materials in Environmental Analysis of Biologically Active Organic Compounds

Electrochemical Sensor for Sulfite and Sulfur Dioxide Based on 3‐Aminopropyltrimethoxysilane Derived Sol‐Gel Composite Electrode

Ferrocene Derivative Mediator Bonded Sol‐gel Membrane Glucose Biosensor

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