Modified glassy carbon electrode with multiwall carbon nanotubes as a voltammetric sensor for determination of noscapine in biological and pharmaceutical samples

Rezaei, Behzad; Zare, Samad

doi:10.1016/j.snb.2008.05.002

Cited by 71 publications

(20 citation statements)

References 54 publications

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“…According to the literatures [35], the microscopic area of the Nafion/MWNTs modified GCE was calculated to be 0.8668 cm 2 , which was 6.9 times greater than the bare GCE (0.1256 cm 2 ).…”

Section: Preparation Of Nafion/mwnts Composite Film-modified Gcementioning

confidence: 98%

Nafion/multi-wall carbon nanotubes composite film coated glassy carbon electrode for sensitive determination of caffeine

Yang

et al. 2010

Journal of Electroanalytical Chemistry

114

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“…According to the literatures [35], the microscopic area of the Nafion/MWNTs modified GCE was calculated to be 0.8668 cm 2 , which was 6.9 times greater than the bare GCE (0.1256 cm 2 ).…”

Section: Preparation Of Nafion/mwnts Composite Film-modified Gcementioning

confidence: 98%

Nafion/multi-wall carbon nanotubes composite film coated glassy carbon electrode for sensitive determination of caffeine

Yang

et al. 2010

Journal of Electroanalytical Chemistry

114

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“…Then, 10 μL of a stable MWCNTs suspension was dropped onto the surface of the GCE, and it was dried in a hot air flow at 50 C. The modified GCE with carbon nanotubes layers was characterized by scanning electron microscopy, and then underwent energy dispersive X-ray (EDX) analysis. 44 An in-situ chemical citrate sol-gel method was developed to obtain a MgFe2O4-MWCNTs precursor. 45 First, 0.75 g of the activated MWCNTs was added into 10 mL of 1.0 mol L -1 citric acid.…”

Section: Preparation Of Mwcnts Modified Glassy Carbon and Mgfe2o4-mwcmentioning

confidence: 99%

Characterization of MgFe2O4 Nanoparticles as a Novel Electrochemical Sensor: Application for the Voltammetric Determination of Ciprofloxacin

2012

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A new sensor containing MgFe2O4 nanoparticles in modified multiwall carbon nanotubes (MgFe2O4-MWCNTs) was prepared, and its electrochemical behavior was investigated. MgFe2O4-MWCNTs were used as a voltammetric sensor for the electrocatalytic determination of ciprofloxacin. The synthesized materials were characterized by different methods such as transmission electron microscopy (TEM), X-ray diffraction (XRD), cyclic voltammetry, and electrochemical impedance spectroscopy. The MgFe2O4-MWCNTs electrode showed an oxidation peak potential at around 250 mV. The immobilized composite films facilitate interfacial electron transfer and electrocatalytic activity on the oxidation of ciprofloxacin. The oxidation peak current was dependent on the ciprofloxacin concentration, which was linear over the range of 0.10 -1000 μmol L -1 with a detection limit and quantification limit of 0.01 and 0.08 μmol L -1 , respectively. The relative standard deviation for the determination of 1.0 μmol L -1 ciprofloxacin was 1.1%. The repeatability of the sensor was investigated by preparing nine similar electrodes. The proposed sensor is a selective and fast tool for the determination of ciprofloxacin in tablet, plasma, and urine samples.

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“…Similar observations have been reported in the literature. 19 The voltammetric response of 2.5 μmol L -1 dexamethasone at the surface of bare and MWCNTsmodified electrodes at pH 4.0 was recorded (Figure 1). The results confirm that the oxidation of dexamethasone on the surface of PE has a high overpotential.…”

Section: Study Of Electrochemical Behavior Of Dexamethasonementioning

confidence: 99%

Square wave voltammetric determination of Dexamethasone on a multiwalled carbon nanotube modified pencil electrode

Rezaei¹,

Zare²,

Ensafi³

2011

J. Braz. Chem. Soc.

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O comportamento eletroquímico de dexametasona, um hormônio esteroidal, foi estudado em um eletrodo de grafite modificado por nanotubos de carbono de camadas múltiplas, por voltametria de onda quadrada e espectroscopia de impedância eletroquímica. Dexametasona mostrou um pico de oxidação com potencial em torno de + 0,80 V na superfície do eletrodo modificado. Sob condições ótimas, a corrente de pico de oxidação depende da concentração da dexametasona e foi linear no intervalo de 0,15-100 μmol L -1 de dexametasona com um limite de detecção de 0,09 μmol L -1 de dexametasona. Os efeitos de substâncias interferentes potenciais na determinação de dexametasona foram investigados e encontrou-se que o sensor proposto é sensível e rápido para a determinação de dexametasona em produtos farmacêuticos e em amostras de urina humana sem qualquer tratamento prévio.The electrochemical behavior of dexamethasone, a steroid hormone, was studied on a multiwalled carbon nanotube (MWCNTs) modified pencil electrode (PE) by square wave voltammety and electrochemical impedance spectroscopy (EIS). Dexamethasone showed one oxidation peak potential around +0.80 V on the surface of the modified electrode. Under optimized conditions, the oxidation peak current depended on the dexamethasone concentration and was linear in the range of 0.15-100 μmol L -1 dexamethasone with a detection limit of 0.09 μmol L -1 dexamethasone. The effects of potential interfering substances on the determination of dexamethasone were investigated to find that the proposed sensor is a sensitive and fast tool for the determination of dexamethasone in both pharmaceutical and human urine samples without any pretreatment.

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Modified glassy carbon electrode with multiwall carbon nanotubes as a voltammetric sensor for determination of noscapine in biological and pharmaceutical samples

Cited by 71 publications

References 54 publications

Nafion/multi-wall carbon nanotubes composite film coated glassy carbon electrode for sensitive determination of caffeine

Nafion/multi-wall carbon nanotubes composite film coated glassy carbon electrode for sensitive determination of caffeine

Characterization of MgFe2O4 Nanoparticles as a Novel Electrochemical Sensor: Application for the Voltammetric Determination of Ciprofloxacin

Square wave voltammetric determination of Dexamethasone on a multiwalled carbon nanotube modified pencil electrode

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