Electrocatalytic determination of sumatriptan on the surface of carbon-paste electrode modified with a composite of cobalt/Schiff-base complex and carbon nanotube

Amiri, Mandana; Pakdel, Zohreh; Bezaatpour, Abolfazl; Shahrokhian, Saeed

doi:10.1016/j.bioelechem.2011.03.003

Cited by 50 publications

(21 citation statements)

References 30 publications

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“…Carbon nanotubes were the favorite electrode modifiers on edge plane pyrolitic graphite (Goyal and Bishnoi 2009,b, Goyal et al 2010a and carbon paste (Abbaspour and Mirzajani 2007) Wang et al (2006). Composites of carbon nanotubes with Schiff base metal complexes (Amiri et al 2011), Cu(OH) 2 (Arvand et al 2012) and cysteic acid (Wang et al 2006) have been also reported. Electrode modification with polypyrrole film (Santhosh et al 2007), montmorillonite (Beltagi 2009), Ni-curcumin (Heli et al 2009), iron complexes (Hasanzadeh et al 2012), β-cyclodextrin (Balaji et al 2008) and chitosan-doped carbon nanoparticles ) complete the scope of antiinflammatory screening.…”

Section: Strategie Example Of Applicationmentioning

confidence: 93%

Voltammetric/amperometric screening of compounds of pharmacological interest

Doménech‐Carbó

Carvalho

Martini

et al. 2014

Reviews in Analytical Chemistry

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Voltammetric and amperometric methods for screening compounds of pharmacological interest are reviewed on the basis of the types of electrodes and analytical strategies. The scope of conventional voltammetric and amperometric methods has been considerably expanded in the last years due to the development of a plethora of modified electrodes, in particular, those involving nanocomposites. The application of solid state voltammetric techniques for pharmacological screening has been also reviewed.

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Section: Strategie Example Of Applicationmentioning

confidence: 93%

Voltammetric/amperometric screening of compounds of pharmacological interest

Doménech‐Carbó

Carvalho

Martini

et al. 2014

Reviews in Analytical Chemistry

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“…The complexes N,N-bis (salicylidene)-4-methyl 1,2-phenylenediamino cobalt(III) acetate (cobalt(III) salophen; Me-CoSal) was synthesized and purified as reported previously [13]. Identification of the structure of synthesized complex was performed by infrared, 1 H and 13 CNMR, UVvis, and elemental analysis.…”

Section: Instrumentsmentioning

confidence: 99%

“…On the basis of our previous works, Schiff base complexes of cobalt are well-known as effective redox mediators and are capable to catalyze the electrochemical oxidation of various organic and biologically important compounds [12,13]. The electrocatalytic oxidation of uric acid and ascorbic acid using modified electrodes such as highly oxidized electrodes [14], self-assembled monolayers of heteroaromatic thiol [15], ordered mesoporous carbon modified electrodes [16], and plane pyrolytic graphite electrodes [17] has been reported.…”

mentioning

confidence: 99%

Simultaneous voltammetric determination of uric acid and ascorbic acid using carbon paste/cobalt Schiff base composite electrode

Amiri

Bezaatpour

Pakdel

et al. 2012

J Solid State Electrochem

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Differential pulse and cyclic voltammetry were applied for the oxidation of mixture of uric acid and ascorbic acid at the surface of carbon paste/cobalt Schiff base composite electrode. The electrooxidation of these compounds at bare electrode is sluggish, and there is no suitable peak separation between them. However, using cobalt methyl salophen as modifier, two well-defined anodic waves with a considerable enhancement in the peak current and a remarkable peak potential separation near 315 mV are obtained. It can improve the kinetics of electron transfer for both compounds remarkably. All these improvements are created because of the electrocatalytic property of cobalt Schiff base complex. The effect of some parameters such as pH and scan rates were studied. All the anodic peak currents for the oxidation of ascorbic acid and uric acid shifted toward more negative potential with an increase in pH, revealing that protons have taken part in their electrode reaction processes. The best peak separation with appropriate current was obtained for pH 4.0. A linear range of 5.0× 10 −4 to 1.0×10 −8 and 1.0×10 −3 to 1.0×10 −8 M with detection limit of 8.0×10 −9 and 8.0×10 −9 M was obtained for ascorbic acid and uric acid using differential pulse voltammetry at the surface of modified electrode, respectively. Analytical utility of the modified electrode has been examined successfully using human urine samples and vitamin C commercial tablets.

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“…Recent studies have demonstrated that CNT can impart strong electrocatalytic activity and minimize surface fouling in electrochemical devices [5][6][7][8][9]. The improved electrochemical response of catecholamine neurotransmitters [5], cytochrome c [6], ascorbic acid [7], NADH [8], hydrazine [9], sumatriptan [10], epinephrine [11], rutin [12], kinetin [13], and other important biological compounds [14] has been illustrated with CNT-modified electrodes.…”

Section: Introductionmentioning

confidence: 99%

Critical evaluation of electrode design and matrix effects on monitoring organophosphate pesticides using composite carbon nanotube-modified electrodes

2011

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Carbon nanotubes (CNT)/Nafion-modified glassy carbon (GC) electrodes were used to immobilize the enzyme acetylcholinesterase (AChE) by crosslinking with glutaraldehyde. The CNT-modified electrodes exhibited a sensitive and stable electrocatalytic behavior towards thiocholine (TCh). Compared to ordinary GC electrodes modified with Nafion, a substantial (500-mV) decrease in the overvoltage of the TCh oxidation reaction is observed, along with a tenfold enhancement in the amperometric response. The CNT/Nafion/AChE electrode has very good stability of at least a month compared to surfaces made without crosslinking in the absence and presence of Nafion. Under optimal loadings of CNT, Nafion, AChE, and glutaraldehyde, a solution of CNT/Nafion in N,N-dimethylformamide (DMF) containing 4 mg/mL CNT and 0.01% Nafion was used to construct the electrodes in order to maximize the sensitivity of the biosensor for inhibition studies. An optimal enzyme loading of 0.137 U and crosslinking in 0.01% glutaraldehyde for 1 h was also needed to achieve this goal. The prepared electrodes had very good reproducibility to 1.0 mM acetylthiocholine (ATCh) (relative standard deviation [RSD] \5% for eight electrodes). Using paraoxon as a model pesticide, the biosensor was able to detect as low as 1.0 nM after 30 min of incubation at 30°C. Using a log scale, the biosensor had good linearity in the concentration range 50-800 nM, with a correlation coefficient of 0.99. The prepared biosensor was used to test real water samples spiked with paraoxon and showed good correlation with a calibration curve using phosphate buffer.

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Electrocatalytic determination of sumatriptan on the surface of carbon-paste electrode modified with a composite of cobalt/Schiff-base complex and carbon nanotube

Cited by 50 publications

References 30 publications

Voltammetric/amperometric screening of compounds of pharmacological interest

Voltammetric/amperometric screening of compounds of pharmacological interest

Simultaneous voltammetric determination of uric acid and ascorbic acid using carbon paste/cobalt Schiff base composite electrode

Critical evaluation of electrode design and matrix effects on monitoring organophosphate pesticides using composite carbon nanotube-modified electrodes

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