Tìm thấy 14+ kết quả cho từ khóa "Pencil graphite electrode"
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Voltammetric determination of famotidine on a disposable pencil graphite electrode. Abstract: The present paper describes the use of a disposable pencil graphite electrode (PGE) for the voltammetric de- termination of famotidine. Cyclic voltammetric studies using different supporting electrolytes emphasized an irreversible oxidation of famotidine on the PGE. Differential pulse voltammetry (DPV) in phosphate buffer solution of pH 6.81 was employed for famotidine’s quantitative determination..
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Simple and rapid voltammetric determination of boron in water and steel samples using a pencil graphite electrode. Abstract: This paper presents a simple, rapid, and accurate voltammetric method for determination of boron in water and steel samples using a disposable pencil graphite electrode. The oxidation of Tiron in the boron–Tiron complex in phosphate buffer at pH 7.5 was measured as a response.
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Through reviewing the literature, no reports have been found on pencil graphite electrodes (PGEs) for the simultaneous determination of these compounds. Since the beginning of the late 1990s, the interest in PGEs has significantly increased because making single-use handmade pencil graphite is easy and it costs less than usual.
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Electrochemical investigation of the interaction of 2,4-D and double stranded DNA using pencil graphite electrodes. Thus, detection of 2,4-D and introducing new aspects for understanding of the interaction of DNA and 2,4-D have gained importance.. There are many reports in the literature for detection of 2,4-D by using electrochemical biosensors [15–24].
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Electrochemical detection of DNA interaction with Mannich base derivatives by disposable graphite electrodes. Abstract: Four different Mannich base derivatives containing an aromatic/heteroaromatic propanone structure (C1 (3-(dimethylamino)-1-(thiophen-2-yl)propan-1-one hydrochloride). The interaction of these compounds with fish sperm double stranded DNA (fs-dsDNA) was investigated by using differential pulse voltammetry (DPV) in connection with a disposable pencil graphite electrode (PGE).
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Due to the fact that the quality of graphite pencil leads is strictly controlled during their production process, the composition and surface of leads of the same type (the same hardness and the same manufacturer) are uniform and the analytes’ voltammetric signals recorded on individual PGEs are very similar, being characterized by good electrode-to-electrode reproducibility [49].. The stability of the DIP stock solution.
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Abstract: Disposable sensors based on a pencil graphite electrode were described for detection of alkyl phenols. The performances of the disposable bare pencil graphite electrode (PGE) and PGE modified with carbon nanotubes, regarding the cyclic and differential pulse voltammetric determination of 4-nonylphenol, 4-octylphenol, and 4-tert-octylphenol, were compared. Some experimental variables of the electrode surface pretreatment and measurement parameters were optimized.
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The same conclusion was reached by the authors studying the oxidation of morin on a platinum electrode. 24 Other authors observed two anodic peaks in the study of oxidation of a powder of morin mechanically fixed on the surface of a GCE. 25 One was attributed to a one-electron oxidation in ring B and the second to one-electron oxidation of hydroxyl groups in ring A. 25 On the other hand, in the oxidation of morin at a pencil graphite electrode (pH 3.25), 15 glassy carbon electrode (pH and carbon
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Voltammetric behavior of nicotine at pencil graphite electrode and its enhancement determination in the presence of anionic surfactant. Voltammetric behavior of indole-3-acetic acid and kinetin at pencil-lead graphite electrode and their simultaneous determination in the presence of anionic surfactant. Sensitive voltammetric determination of testosterone in pharmaceuticals and human urine using a glassy carbon electrode in the presence of cationic surfactant.
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In the supercapacitor application, mostly capacitive properties of the developed electrode were investigated and evaluated as a good candidate for FC applications.. The electrospinning of DBCs was first investigated in FC applications in the scope of the presented study. Although the pencil graphite electrode (PGE) shows the best FC performances in the presented study, the usage of the DBC is the main innovation of this research and is worth developing..
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In the current study, the electrochemical behaviors of six nitro-substituted benzamide compounds were investigated by means of a pencil graphite electrode (PGE). 40 Thus, many scientists have recently focused on the use of this electrode in various electroanalytical applications due to the useful properties of PGEs.
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Flow injection amperometric determination of hydrazine based on its electrocatalytic oxidation at pyrocatechol violet modified pencil graphite electrode. Preparation and characterization of AuNPs/CNTs-ErGO electrochemical sensors for highly sensitive detection of hydrazine. Synthesis and characterization of co3o4/multiwalled carbon nanotubes nanocomposite for amperometric sensing of hydrazine. doi: 10.1002/elan.201400546
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dichloride and single-stranded DNA (ssDNA) and double-stranded DNA (dsDNA) was per- formed by CV technique by Ravera et al. 20 The investigation of cis-diamminedichloroplatinum(II) (cis-DDP) and the chemotherapeutic agent cis-bis(3-aminoflavone)dichloroplatinum(II) (cis-BAFDP) electrochemically with calf thymus dsDNA by DPV with a disposable pencil graphite electrode (PGE) at the surface was done by Erdem et al. 22 Since MC is an alkylating agent that binds to DNA, causing cross-linking and inhibition
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Physical characterization of the modified electrode. The morphology and structure of the polymer film before and after incorporation of Ag nanoparticles were characterized by SEM. For SEM studies, the modified electrode system was prepared using pencil graphite electrodes (PGEs) with identical surface area. As clearly seen in Figure 4a, the polymer film has a porous structure that supports adsorption of the Ag + ions, and the Ag nanoparticles are well dispersed in the polymeric.
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The electrolysis for COD wastewater treatment used a graphite electrode consisting of three components: (1) a DC power supply. Electrolytic model of COD wastewater treatment using graphite electrode. First, experiments were conducted to evaluate the efficiency of heavy metal removal under various voltages, then the most suitable voltage for electrolysis with the highest removal and the lowest power consumption was chosen.
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As seen in Figure 2a, the surface of the graphite electrode had microleaves. When Ni was deposited on graphite, cracks were seen on the surface instead of microleaves (Figure 2c). The SEM image of the Ni@MWNTs electrode shows that microleaves were covered by a fibrous structure. In addition, metallic Ni particles are seen in the fibrous zone in Figure 2d. All SEM images were obtained under the same conditions (magnitude: 5.00 kx and 2 µm)..
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Each metallocorrole was examined as to its catalytic activity for the electoreduction of dioxygen when coated on an edge-plane pyrolytic graphite electrode in 1.0 M HClO 4 . Cyclic voltammetry combined with linear sweep voltammetry at a rotating disk electrode (RDE) and a rotating ring disk electrode (RRDE) was utilized to evaluate the catalytic activity for the electroreduction of O 2 . The structures of these compounds are shown in the Chart.
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A biochar-modified carbon paste electrode. Abstract: The present work examıned the use of biochar derived from tea waste as a novel electrode material. For the fabrication of the biochar electrode, suitable amounts of biochar and graphite were mixed with mineral oil for the first time. The electrochemical performance of the biochar-modified carbon paste electrode (BCPE) was measured by various cyclic voltammetric reactions for several redox systems.
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Cyclic voltammetry is used as a tool to distinguish electrode responses for different physical properties.. A three-compartment cell containing a flexible graphite-working electrode and a Pt mesh counter electrode was used. Total surface area of the samples exposed to the electrolyte was 1 cm 2 . Cyclic voltammetry and AC- impedance measurements were taken using a Solartron 1287 &. Hg/Hg 2 SO 4. Plain flexible graphite was compared with resin impregnated flexible graphite.
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Recovery analysis of hydrazine determination in Karaçay and Gediz Rivers samples at the modified electrode (n = 3).. doi: 10.1016/j.snb . Gold nanoparticle-modified graphite pencil electrode for the high-sensitivity detection of hydrazine. doi: 10.1016/j.talanta . Nanomolar determination of hydrazine by TiO 2 nanoparticles modified carbon paste electrode. doi: 10.1007/s . Long-term inhalation toxicity of hydrazine.