The effect of modifying an edge-plane pyrolytic graphite electrode with single-wall carbon nanotubes on its use for sensing diclofenac

Goyal, Rajendra N.; Chatterjee, Sanghamitra; Rana, Anoop Raj Singh

doi:10.1016/j.carbon.2010.07.024

Cited by 72 publications

(44 citation statements)

References 32 publications

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“…Gas chromatography demands extraction and derivatization prior to separation and detection [41]. These methods are time consuming and/or expensive and often need the pretreatment step.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, electrochemical techniques are simple and versatile due to their advantages such as cheap instrumentation, quick response time, high sensitivity and wide linearity [41,43].…”

Section: Introductionmentioning

confidence: 99%

“…In view of the prominence of DS in clinical applications, various efforts have been made for the determination of DS, including gas chromatography-mass spectrometry [19,20], liquid chromatography [21][22][23], liquid chromatography-tandem mass spectrometry [24], spectrophotometry [25][26][27][28][29], colorimetry [30], spectrofluorimetry [31], and voltammetry [32][33][34][35][36][37][38][39][40][41][42][43] in biological fluids.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Gold nanoparticle/multi-walled carbon nanotube modified glassy carbon electrode as a sensitive voltammetric sensor for the determination of diclofenac sodium

Afkhami

Bahiraei

Madrakian

2016

Materials Science and Engineering: C

125

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“…Gas chromatography demands extraction and derivatization prior to separation and detection [41]. These methods are time consuming and/or expensive and often need the pretreatment step.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Gold nanoparticle/multi-walled carbon nanotube modified glassy carbon electrode as a sensitive voltammetric sensor for the determination of diclofenac sodium

Afkhami

Bahiraei

Madrakian

2016

Materials Science and Engineering: C

125

View full text Add to dashboard Cite

“…It also indicates that the observed voltammetric response at the SWCNT modified EPPGE is not due to the edge-plane sites on the SWCNT. The presence of significant amount of metal impurities within the nanotubes is potentially accountable for electrocatalytic activity of SWCNT [34,35].…”

Section: Square Wave Voltammetrymentioning

confidence: 99%

Electrochemical Sensor Based on Oxidation of 2,8‐Dihydroxyadenine to Monitor DNA Damage in Calf Thymus DNA

2011

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A novel and reliable direct electrochemical method has been established to monitor DNA damage in acid hydrolyzed calf thymus DNA, based on the determination of 2,8-dihydroxyadenine (2,8-DHA). A single-wall carbon nanotubes (SWCNT) modified edge plane pyrolytic graphite electrode (EPPGE) has been used as a sensor to monitor the DNA damage. 2,8-DHA the main in vivo adenine oxidation product undergoes oxidation at~395 mV at SWCNT modified EPPGE using square wave voltammetry (SWV). The sensor exhibits potent and persistent electron-mediating behavior. A well-defined oxidation peak for the oxidation of 2,8-DHA was observed at modified electrode with lowering of peak potential and increase in peak current as compared to bare EPPGE. At optimal experimental conditions, the catalytic oxidative peak current was responsive with the 2,8-DHA concentrations ranging from 0.05 nM to 100 nM. The detection limit was 3.8 10 À11 M and limit of quantification was 1.27 10 À10 M. The modified electrode exhibited high stability and reproducibility.

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“…Owing to huge surface area, subtle electronic characteristics, and strong adsorptive capability, CNTs have the ability to promote the electron transfer reactions of electroactive bimolecules and drugs [19][20][21]. A comparison of catalytic activity of SWCNT and MWCNT for the determination of amlodipine besylate and other biomolecules has been made [22,23] and it is found that SWCNT exhibits higher activity as compared to MWCNT, hence, this article reports a convenient method for the assay of HBP, based on unique characteristic of SWCNT. At SWCNT-coated EPPGE the electrochemical response of HBP improves remarkably as reduction peak current increases and peak potential shifts to less negative potential as compared to bare EPPGE.…”

Section: Introductionmentioning

confidence: 99%

Carbon nanotube-based electrochemical sensor for the determination of halobetasol propionate, a topical corticosteroid

Goyal

Agrawal

2011

J Appl Electrochem

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Electrocatalytic reduction of halobetasol propionate (HBP) at single-walled carbon nanotube (SWCNT) modified edge plane pyrolytic graphite electrode (EPPGE) was performed by square wave voltammetry and cyclic voltammerty in phosphate buffer of pH 7.2. The surface morphology of SWCNT/EPPGE was characterized by field emission scanning electron microscopy. The enhanced peak current (i p ) and lower reduction peak potential (E p ) at modified electrode as compared to bare electrode were obvious evidences for the electrocatalytic ability of SWCNT toward the reduction of HBP. The cathodic peak current varied linearly with concentration of HBP in the range 0.02 to 1 mM with sensitivity of 2.432 lA mM -1 and detection limit (3r/slope) of 10 lM. The product of electrochemical reduction of HBP was characterized using FT-IR and 1 H-NMR spectroscopic techniques. A tentative mechanism for the formation of product was suggested and it was found that reduction of [C=O occurred at position three. The proposed methodology was successfully applied to the detection of HBP in pharmaceutical preparations.

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The effect of modifying an edge-plane pyrolytic graphite electrode with single-wall carbon nanotubes on its use for sensing diclofenac

Cited by 72 publications

References 32 publications

Gold nanoparticle/multi-walled carbon nanotube modified glassy carbon electrode as a sensitive voltammetric sensor for the determination of diclofenac sodium

Gold nanoparticle/multi-walled carbon nanotube modified glassy carbon electrode as a sensitive voltammetric sensor for the determination of diclofenac sodium

Electrochemical Sensor Based on Oxidation of 2,8‐Dihydroxyadenine to Monitor DNA Damage in Calf Thymus DNA

Carbon nanotube-based electrochemical sensor for the determination of halobetasol propionate, a topical corticosteroid

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