Nanogold-modified Carbon Paste Electrode for the Determination of Atenolol in Pharmaceutical Formulations and Urine by Voltammetric Methods

Behpour, Mohsen; Honarmand, Ebrahim; Ghoreishi, Sayed Mehdi

doi:10.5012/bkcs.2010.31.04.845

Cited by 25 publications

(11 citation statements)

References 21 publications

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“…AuNP-based composite electrode matrices have been used to detect phenol, 461 hypoxanthine, 644 H 2 O 2 ,645,646 atenolol, 647 glucose, 648 etc. Similarly, tyrosinase biosensors consisting of composite graphite-Teflon electrodes modified with AuNPs have been developed by Pingarrón et al .…”

Section: Electrical and Electrochemical Sensingmentioning

confidence: 99%

Gold Nanoparticles in Chemical and Biological Sensing

et al. 2012

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Section: Electrical and Electrochemical Sensingmentioning

confidence: 99%

Gold Nanoparticles in Chemical and Biological Sensing

et al. 2012

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“…7(C)). According to the integrated Cottrell equation [24], the apparent diffusion coefficient (D) of TEDA was calculated to be about 1.54 × 10 -5 cm 2 s -1 . of TEDA in two different activated carbons obtained from war masks based on standard Addition method.…”

Section: Diffusion Coefficient Studymentioning

confidence: 99%

Electroanalytical Measurement of TEDA (Triethylenediamine) in the Masks of War

Ariani

Honarmand

Mostaanzadeh

et al. 2017

J. Electrochem. Sci. Technol

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In this paper, for the first time, the electroanalytical study of Triethylenediamine, TEDA was done on a typically graphene modified carbon paste electrode (Gr/CPE) in pH=10.5 of phosphate buffer solutions (PBS). The surface morphology of the bare and modified electrodes was characterized by scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The electro-oxidation of TEDA was investigated at the surface of modified electrode. The results revealed that the oxidation peak current of TEDA at the surface of Gr/CPE is 2.70 times than that shown at bare-CPE. A linear calibration plot was observed in the range of 1.0 to 202.0 ppm. In this way, the detection limit was found to be 0.18 ppm. The method was then successfully applied to determination of TEDA in aqueous samples obtained from two kinds of activated carbon from the masks of war. On the other hand, density functional theory (DFT) method at B3LYP/6-311++G** level of theory and a conductor-like Polarizable Continuum Model (CPCM) was used to calculate the pK a values of TEDA. The energies of lowest unoccupied molecular orbital (E L U M O ) and highest occupied molecular orbital (E H O M O ), gap energy (ΔE) and some thermodynamic parameters such as Gibbs free energy of TEDA and its conjugate acid (HT + ) were calculated. The results of calculated pK a were found to be in good agreement with the experimental values.

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“…CPEs are a good choice for electrochemical analysis, because of their wide potential window, lower residual currents than those of the glassy carbon electrodes and easy preparation [14] . Gold nanoparticles-modified carbon paste electrode (GNPs/CPE) is used in many studies to determine a variety of analytes including vitamins, drugs, dyes, ions, heavy metals and so on in biological or non-biological matrixes [15] , [16] , [17] . Vitamins are organic molecules; that their adequate amounts are necessary for normal activity and regular metabolism of the body and its functions [18] .…”

Section: Introductionmentioning

confidence: 99%

Square wave voltammetric quantification of folic acid, uric acid and ascorbic acid in biological matrix

Arvand

Pourhabib

Giahi

2017

Journal of Pharmaceutical Analysis

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Nowadays, modified electrodes with metal nanoparticles have appeared as an alternative for the electroanalysis of various compounds. In this study, gold nanoparticles (GNPs) were chosen as interesting metal nanoparticles for modifying of carbon paste electrode (CPE). GNPs and the gold nanoparticles-modified carbon paste electrode (GNPs/CPE) were characterized by UV–Vis spectroscopy, transmission electron microscopy (TEM) and scanning electron microscopy (SEM). GNPs/CPE as a simple and sensitive electrode was used to study three important biological molecules: folic acid (FA), uric acid (UA) and ascorbic acid (AA). Square wave voltammetry (SWV) was used as an accurate technique for quantitative measurements. A good linear relation was observed between anodic peak current (ipa) and FA (5.2 × 10−6 – 2.5 × 10−5 M), UA (1.2 × 10−6 – 2.1 × 10−5 M) and AA (1.2 × 10−6 – 2.5 × 10−5 M) concentrations in simultaneous determination of these molecules.

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Nanogold-modified Carbon Paste Electrode for the Determination of Atenolol in Pharmaceutical Formulations and Urine by Voltammetric Methods

Cited by 25 publications

References 21 publications

Gold Nanoparticles in Chemical and Biological Sensing

Gold Nanoparticles in Chemical and Biological Sensing

Electroanalytical Measurement of TEDA (Triethylenediamine) in the Masks of War

Square wave voltammetric quantification of folic acid, uric acid and ascorbic acid in biological matrix

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