Multiwalled Carbon Nanotubes Modified Electrode as a Sensor for Adsorptive Stripping Voltammetric Determination of Hydrochlorothiazide

Present communication reports a completely green and inexpensive method for synthesis of gold nanoparticles and their novel application in fabrication of gold nanoparticle modified anthocyanin-based carbon paste electrode for heavy metal estimation. Phytochemicals in black rice extract served as building blocks for gold nanoparticles. The conditions for gold nanoparticle preparation from black rice extract were optimized using ultraviolet-visible data. The characterization of the nanoparticles prepared was done using X-ray diffraction and atomic force microscopy techniques. The nanoparticles prepared were found to be in the range 31-52 nm and spherical in morphology. The fabricated metal sensor was used for the determination of lead, cadmium and copper using square-wave anodic stripping voltammetry. Various electrochemical parameters such as amount of modifier, supporting electrolyte, accumulation time and accumulation potential were optimized in terms of current response. Cyclic voltammetry and electrochemical impedance spectroscopy were used to characterize the fabricated sensor. Linear calibration curves were obtained in the concentration range of 50-500 lg L -1 for lead and 200-700 lg L -1for cadmium and copper. The modified sensor showed enhanced sensitivity for electrochemical estimation of lead, cadmium and copper with low limits of detection 9.178, 86.327 and 85.373 lg L -1 , respectively.

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“…The electroactive surface area of the electrodes was calculated according to the Randles-Sevcik equation at 25 8C (Rezaei and Damiri 2008).…”

Section: Effective Surface Areamentioning

confidence: 99%

Green gold nanoparticle modified anthocyanin-based carbon paste electrode for voltammetric determination of heavy metals

Devnani

Satsangee

2014

Int. J. Environ. Sci. Technol.

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“…Nevertheless, these techniques have some disadvantages, such as high initial investment (equipment), the need for sample pre-treatments, time-consuming procedures, required expertise, and the high cost of consumables. In this sense, electroanalytical methods play a fundamental role and are stated as a very notable alternative for the determination of this anti-hypertensive drug [13][14][15][16][17][18]. In particular, voltammetric techniques provide excellent detection and quantification limits, high sensitivity and selectivity, with relatively low economic cost.…”

Section: Introductionmentioning

confidence: 99%

Voltammetric Determination of Anti-Hypertensive Drug Hydrochlorothiazide Using Screen-Printed Electrodes Modified with L-Glutamic Acid

et al. 2017

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This work deals with the development of screen-printed carbon electrodes modified with L-glutamic acid via two different approaches: electropolymerization (SPCE/PGA) and aryl diazonium electrochemical grafting (SPCE/EGA). SPCE/PGA and SPCE/EGA were analytically compared in the determination of hydrochlorothiazide (HCTZ) by differential pulse voltammetry. Both electrochemical characterization and analytical performance indicate that SPCE/EGA is a much better sensor for HCTZ. The detection and quantification limits were at the level of µmol L −1 with a very good linearity in the studied concentration range. In addition, the proposed SPCE/EGA was successfully applied for the determination of HCTZ in an anti-hypertensive drug with high reproducibility and good trueness.

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“…This kind of sensor consists of a combination of ionophore, paraffin oil, graphite powder and sometimes a matter of modifier [13][14][15][16][17][18][19] .…”

Section: Introductionmentioning

confidence: 99%

Fabrication A Composite Electrode Based on MWCNT/Zeolite for Potentiometric Determination of Chromium (III)

Heidari¹,

Masrournia²,

Khoshnood³

2016

Orient. J. Chem

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A nanocomposite based on carbon paste electrode fabricated, by using zeolite as ion carrier .Functional multi-wall carbon nanotube was used for improvement of electrode response. The optimal composition of CPE was built from 65% graphite powder, 20 wt% paraffin oil, 5% ion carrier (zeolite), 10% MWCNTs. Electrode showed Nernstian response 19.88 (±0.2)mVdecade "1 in the measuring range 10 "7 -10 "2 mol L "1 and showed detection limit of 6.3×10 -7 M. The sensor was successfully used for potentiometric titration Cr 3+ with EDTA. The carbon paste electrode showed fast response time, good selectivity and applicable in the wide pH range of 3 -10.

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Multiwalled Carbon Nanotubes Modified Electrode as a Sensor for Adsorptive Stripping Voltammetric Determination of Hydrochlorothiazide

Cited by 79 publications

References 45 publications

Green gold nanoparticle modified anthocyanin-based carbon paste electrode for voltammetric determination of heavy metals

Green gold nanoparticle modified anthocyanin-based carbon paste electrode for voltammetric determination of heavy metals

Voltammetric Determination of Anti-Hypertensive Drug Hydrochlorothiazide Using Screen-Printed Electrodes Modified with L-Glutamic Acid

Fabrication A Composite Electrode Based on MWCNT/Zeolite for Potentiometric Determination of Chromium (III)

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