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carbon paste electrode voltammograms

Preparation and characterization of carbon paste …

2007-9-28 · MODIFIED CARBON PASTE ELECTRODE 995 Fig. 1. Cyclic voltammograms of a) the Sn(IV)HCF(II) electrode and b) the Sn(II)HCF(II) electrode, both in a 0.5 M phosphate buffer solution pH 7 (with K+ ions) at a scan rate of 60 mV s-1. The cyclic voltammograms of …

Direct Electron Transfer of Myoglobin on Zirconia

2017-8-24 · 232 Sedigheh Banapour et al Keywords: direct electron transfer, zirconia Nanoparticles, Myoglobin, carbon paste electrode INTRODUCTION The direct electrochemistry of redox proteins is an important foundation for biosensors and

Electrochemical Behavior of Triethanolamine at a Carbon

2014-10-22 · carbon paste electrode. A differential pulse voltammetric method was also developed for the determination of triethanolamine as an appliion to electroanalysis at a carbon paste electrode. The resultant voltammograms have revealed the irreversible electrochemical process that can be utilized to quantify the substances of interest, for

{Analysis of sulfamethoxazole by square wave …

The carbon paste electrode was prepared by mixing 2.25 g of graphite powder with 0.75 g of mineral oil. This mixture was homogenized by magnetic stirring in a 25 mL beaker containing 10 mL of chloroform (Merck). The paste was obtained after evaporation of the solvent. The carbon paste was packed into a versatile electrode body fabried in our

Appliion of a Graphene Oxide–Carbon Paste …

Graphene oxide-modified carbon paste electrode was used in coination with the SWASV technique to develop a novel and alternative electroanalytical method for lead determination in real samples. The GO-modified electrode exhibits stability, reproducibility and favourable properties for …

Pioglitazone Hydrochloride/SDS Modified Carbon Paste

2016-12-28 · at bare carbon paste electrode (dotted line), Pioglitazone hydrochloride modified carbon paste electrode (solid line), Pioglitazone Hydrochloride/SDS modified carbon paste electrode (dashed line) in 0.2 M phosphate buffer solution at pH 7.2 with a scan rate of …

Electrochemical determination of echol in tea samples

2013-12-24 · trode configuration consisting of working electrode (an- thraquinone modified carbon paste), a silver-silver chlo- ride reference electrode and a platinum wire serving as a counter electrode. 2.3. Preparation of Carbon Paste Electrode . The carbon paste electrode (CPE), first introduced by Adams [13], is one of the most commonly used elec- trodes.

β-Cyclodextrin Modified Carbon Paste Electrode

2010-11-30 · Fig. 2 represents the cyclic voltammograms for 3.0x10-9 M donepezil in BR buffer solution of pH 3.0 at bare carbon paste electrode (CPE) and β-cyclodextrin modified carbon paste electrode (CDMCPE), with accumulation times of 300 s and 150 s, respectively, accumulation potential of -0.4 V. Figure 2. Typical CV of 3.0 x 10-9

Carbon Paste Electrode Modified by Multiwalled Carbon

electrode which is carbon paste electrode modified by silica gel nanoparticles/MWCNTs electrode, the reference electrode (Ag/AgCl) and a Pt wire as a counter electrode. Cyclic voltammograms of

Electrochemical Investigation of 4-Aminophenol at …

Using the cyclic voltammetry, the electrode behaviour of 4-aminophenol has been studied in 0.1 M phosphate buffer solutions at carbon paste electrode and surfactant modified carbon paste electrode.

Trace determination of cadmium in water using …

2014-5-8 · Increasing awareness on the environmental impact of heavy metals has increased a considerable interest in the determination of metals in natural water bodies. The present paper describes the development and electrochemical appliion of carbon paste electrode modified with fibrous part of coconut shell for the determination of cadmium in water samples.

A New Biosensor for Glucose Based on Screen Printed …

2013-12-24 · a screen printed carbon electrode modified with tin dio- xide in the electrode bulk and glucocose oxidase entra- pped in a Nafion film on the electrode surface. 3.1. Studies with Hydrogen Peroxide . 3.1.1. Cyclic Voltammetry . Figure 1. compares the cyclic voltammograms of a plain carbon paste electrode and a CPE modified with tin (IV) oxide.

PHENOLIC BIOSENSOR BASED ON CARBON PASTE …

2018-2-28 · The effect of PPO enzyme incorporated in Carbon paste electrode (CPE), was tested by comparing the voltammograms obtained in the same conditions by both electrodes (unmodified and modified). Figure 2 shows cyclic voltammograms recorded with unmodified

Sequential Measurement of Ascorbic Acid and Uric Acid

2018-9-8 · voltammograms on the plasma treated screen-printed carbon paste electrode has developed: (1) determined the AA concentration (2) determined the degree of interference caused by AA at the uric acid’s oxidative peak (3) the estimated interference-free UA peak current is determined by subtracting the level of AA interference.

Appliion of a Graphene Oxide–Carbon Paste …

Graphene oxide-modified carbon paste electrode was used in coination with the SWASV technique to develop a novel and alternative electroanalytical method for lead determination in real samples. The GO-modified electrode exhibits stability, reproducibility and favourable properties for …

Voltammetric Detection of Trimethoprim at CTAB …

2017-7-6 · Preparation of bare carbon paste electrode Bare carbon paste electrode was prepared by hand mixing of graphite powder 70% and silicon oil 30% in an agate mortar for about 30 min to get homogenous carbon paste. The paste was then packed into the cavity of a Teflon tube electrode (3 mm diameter). Before

Study of Voltammetric Determination of Carcinogenic 1

2016-9-16 · Study of Voltammetric Determination of Carcinogenic 1-Nitropyrene and 1-Aminopyrene Using a Glassy Carbon Paste Electrode Design of a voltammetric

Carbon Paste Electrode Modified by Multiwalled Carbon

electrode which is carbon paste electrode modified by silica gel nanoparticles/MWCNTs electrode, the reference electrode (Ag/AgCl) and a Pt wire as a counter electrode. Cyclic voltammograms of

Analytical Letters DNA MODIFIED CARBON PASTE …

2015-4-1 · Carbon paste was then prepared in the usual way by hand-mixing powder with mineral oil in a 70: 30 (m/m) mass ratio. The working electrode was a glass tube (4 mm in diameter) with a copper wire providing electrical contact.After being tightly packed with carbon paste, the electrode surface was polished prior to use. VoltammetricProcedure

{Analysis of sulfamethoxazole by square wave …

The carbon paste electrode was prepared by mixing 2.25 g of graphite powder with 0.75 g of mineral oil. This mixture was homogenized by magnetic stirring in a 25 mL beaker containing 10 mL of chloroform (Merck). The paste was obtained after evaporation of the solvent. The carbon paste was packed into a versatile electrode body fabried in our

An Efficient Amperometric Sensor for Hydrogen Peroxide …

2015-7-1 · electrode was designed with a reservoir for holding the carbon paste. The electrode surface can be renewed very easily for a large nuer of times over a long period. The use of carbon-paste matrix, besides renew ability by a simple polishing, offers several other advantages including easy preparation, uniform distribution of the alyst into

Electrochemical Investigation of 4-Aminophenol at …

Using the cyclic voltammetry, the electrode behaviour of 4-aminophenol has been studied in 0.1 M phosphate buffer solutions at carbon paste electrode and surfactant modified carbon paste electrode.

Zinc Oxide Modified Carbon Paste Electrode Sensor for …

2015-10-31 · and polyglycine (PG) was used as a modifier in carbon paste electrode (CPE) for the detection of uric acid (UA). The electrochemical response of bare carbon paste electrode (BCPE), ZnO and surfactants modified carbon paste electrode (MCPE) in the presence of potassium ferrocyanide in 1M KCl solution was studied.

Carbon Paste Electrode Modified With …

2017-1-20 · A nano-CuO modified carbon paste electrode (NMCPE) is constructed and its appliion for indirect square wave voltammetric (SWV) detection of ATZ is reported. The sensing performance mechanism of the nano-CuO modified carbon paste electrode toward atrazine is due to complexation of the analyte with Cu (II) ion.

Optimization of the use of carbon paste electrodes …

2008-6-30 · To overcome these problems the use of carbon paste electrode (CPE), which is prepared with powdered mineral sulphides, has been investigated by some authors. 8-11 However, a more specific work to evaluate the repeatability of these CPE has no precedent in the literature.

(PDF) Electrochemical Sensor for Cobalt (II) by …

Cyclic voltammograms of (curve a) unmodified carbon paste electrode and Zn/Al- CPPA nanocomposite modified electrode (curve b) in blank supporting electrolyte at scan rate 100 mV s-1 Figure 3 shows the cyclic voltammogram of Co(II) at modified and unmodified pencil-based CPEs in …

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