An improved method for simultaneous square-wave voltammetric determination of amlodipine and enalapril at multi-walled carbon nanotubes paste electrode based on effect of cationic surfactant

Valezi, Camila Farinha; Duarte, Eduardo Henrique; Mansano, Guilherme Roberto; Dall’Antônia, Luiz Henrique; Tarley, César Ricardo Teixeira; Sartori, Elen Romão

doi:10.1016/j.snb.2014.08.078

Cited by 55 publications

(20 citation statements)

References 36 publications

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“…To this solution, 0.1 M ammonium persulfate activated by 1 M HCl (Solution B), which acts as an oxidizer, was slowly added dropwise with continuous stirring at 4-5 • C for 5 h to completely polymerize the mixture (Scheme 4). The precipitate was filtered, washed with deionized water and acetone, and finally dried in an oven for 24 h to achieve a constant mass [44,45]. range varying from 100 Hz to 100 kHz.…”

Section: Preparation Of Pani/iron Oxidementioning

confidence: 99%

Electrochemical Biosensor for the Determination of Amlodipine Besylate Based on Gelatin–Polyaniline Iron Oxide Biocomposite Film

et al. 2018

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Abstract:In the present study, a new biosensor based on lipase from Candida rugosa (CRL) was developed for amlodipine besylate drug (AMD) with biodegradable material using a mixture of polyaniline iron oxide and gelatin. Polyaniline/Fe 2 O 3 (PANI@Fe 2 O 3 ) was prepared by a chemical polymerization method in a medium of ammonium persulfate as an oxidant and characterized by employing Scanning Electron Microscopy (SEM), Fourier Transform Infrared (FTIR), and Ultra-violet (UV) spectroscopy. The purified enzyme was entrapped in the biocomposite matrix film with the aid of a glutaraldehyde cross-linking reagent to establish the immobilization of the lipase. The principle of the biosensor is based on the electrochemical properties of amlodipine besylate (AMD), which were studied for the first time using the cyclic voltammetric method. The cathodic behavior of AMD was measured on the irreversible reduction signal at −0.185 V versus Ag/AgCl at pH 7.4 and 30 • C in a phosphate alkaline buffer.

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Section: Preparation Of Pani/iron Oxidementioning

confidence: 99%

Electrochemical Biosensor for the Determination of Amlodipine Besylate Based on Gelatin–Polyaniline Iron Oxide Biocomposite Film

et al. 2018

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“…HTZ and ENP exhibited irreversible oxidation peaks at potentials of 1.31 V and 1.75 V, respectively. According to the literature, the electrochemical oxidation of HTZ occurs by a two electron process [14], and by a one electron process for ENP [33].…”

Section: Investigation Of the Electrochemical Behaviour Of Htz And Enmentioning

confidence: 99%

Simultaneous determination of antihypertensive drugs by flow injection analysis using multiple pulse amperometric detection with a cathodically pretreated boron-doped diamond electrode

Lourenção

Medeiros

Fatibello‐Filho

2015

Journal of Electroanalytical Chemistry

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A flow injection analysis (FIA) and multiple pulse amperometric detection (MPA) using a cathodically pretreated boron-doped diamond electrode (CPT-BDD) were employed for simultaneous determination of the antihypertensive drugs hydrochlorothiazide (HTZ) and enalapril (ENP). A dual-potential waveform as a function of time, previously optimized, was used: E det.1 = +1.50 V / 150 ms (pulse potential at which HTZ was oxidized) and E det.2 = +1.80 V / 150 ms (pulse potential at which oxidation of both analytes -HTZ and ENP -occurs). The analytical curves presented good linearity from 0.40 to 8.00 μmol L −1 for HTZ and from 0.03 to 1.00 μmol L −1 for HTZ, and the detection limits were 0.20 μmol L −1 for HTZ and 0.01 μmol L −1 for ENP. The proposed flow method presented an analytical frequency of 89 determinations per hour, good precision and accuracy, was successfully applied to the simultaneous determination of HTZ and ENP in pharmaceutical samples and the results obtained using the FIA-MPA method were in agreement with those obtained using a comparative method (HPLC) at a 95% confidence level.

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“…The increasing use of amlodipine along with other drugs also demands its selective extraction from complex mixtures and its rapid determination with sufficient accuracy. Current analytical tools including liquid and gas chromatographic techniques [11,12], electrophoresis, enzyme-based immune assays [13], and other spectroscopic and electrochemical methods [14] offer suitable detection protocols for amlodipine determination in different matrices [15][16][17]. However, the extraction of target drug from complex biological samples is a challenging task for which highly selective recognition materials are needed.…”

Section: Introductionmentioning

confidence: 99%

Molecularly Imprinted Polymer-Silica Hybrid Particles for Biomimetic Recognition of Target Drugs

Roshan

Mujahid

Afzal

et al. 2019

Advances in Polymer Technology

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Biomimetic hybrid particles based on amlodipine-imprinted poly(methacrylic acid-co-ethylene glycol dimethacrylate) (MIP) are developed by free radical polymerization of the monomers and crosslinkers in the presence of silica nanoparticles. Atomic force microscopy is used to study the distribution and surface morphology of MIP-silica hybrid particles. The responsive properties are studied by exposing the synthesized MIP-silica hybrid material to standard amlodipine drug solution and consequently monitoring the decrease in drug concentration. The control material, i.e., nonimprinted polymer- (NIP-) silica hybrid particles, exhibits much lower response during the drug rebinding assay suggesting the lack of functionality due to the absence of imprinting effects. The selectivity of MIP-silica hybrid particles is evaluated by examining the aspirin uptake that shows lower absorbance shifts for aspirin solution compared to amlodipine. It indicates a higher sensitivity of MIP-silica hybrid particles toward targeted pharmaceutical drug recognition and also exhibits their potential for drug assay in multiplex biological samples. Furthermore, MIP-silica hybrid particles used in the drug rebinding assay can be recovered and regenerated for subsequent tests without losing recognition properties.

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An improved method for simultaneous square-wave voltammetric determination of amlodipine and enalapril at multi-walled carbon nanotubes paste electrode based on effect of cationic surfactant

Cited by 55 publications

References 36 publications

Electrochemical Biosensor for the Determination of Amlodipine Besylate Based on Gelatin–Polyaniline Iron Oxide Biocomposite Film

Electrochemical Biosensor for the Determination of Amlodipine Besylate Based on Gelatin–Polyaniline Iron Oxide Biocomposite Film

Simultaneous determination of antihypertensive drugs by flow injection analysis using multiple pulse amperometric detection with a cathodically pretreated boron-doped diamond electrode

Molecularly Imprinted Polymer-Silica Hybrid Particles for Biomimetic Recognition of Target Drugs

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