Potentiometric determination of phosphorus in biodiesel using chemically modified electrode with cobalt film

Sartori, Mayara Conrado; Zezza, Tina Rita Celli; Paim, Leonardo Lataro; Stradiotto, Nelson Ramos

doi:10.1016/j.fuel.2013.09.019

Cited by 10 publications

(12 citation statements)

References 21 publications

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“…To gather more information about the reaction mechanisms and the rate-limiting step, we studied the evolution of the current of the anodic and cathode peaks of the modified electrode as a function of the root of the scanning speed (Figure 6). This evolution is linear, revealing that the process at the surface of the working electrode is governed by the diffusion (Satana Kara, 2014; Sartori et al , 2014).…”

Section: Resultsmentioning

confidence: 97%

Kinetic study and characterization of a platinum electrode/sensitive membrane for malachite green detection

Ghodbane

Kherrrat

Zougar

et al. 2018

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Purpose The purpose of this work is to explore electrical properties of an electrochemical sensor designed for the detection of malachite green (MG) present in an aqueous solution. Design/methodology/approach The present sensor consists in the spatial coupling of a polymeric membrane and an ion-sensitive electrode (platinum electrode). The preparation of the polymeric membrane involves the incorporation of an ionophore (D2HPA), a polymer (polyvinylchloride [PVC]) and a plasticizer (dioctyl phthalate [DOP]). Several techniques have been used to characterize this sensor: the cyclic voltammetry, the electrochemical impedance spectroscopy and the optical microscopy. The sensibility, the selectivity and the kinetic study of a modified platinum electrode have been evaluated by cyclic voltammetry. Findings The obtained results reveal the possibility of a linear relationship between the current of reduction peaks and MG concentration. A linear response was obtained in a wide-concentration range that stretches from 10−5 to 10−13 mol L−1, with a good correlation coefficient (0.976) and a good detection limit of 5.74 × 10−14 mol L−1 (a signal-to-noise ratio of 3). In addition, the voltammetric response of modified electrode can be enhanced by adding a layer of Nafion membrane. Under this optimal condition, a linear relationship was obtained, with a correlation coefficient of 0.986 and a detection limit of 1.92 × 10−18 mol L−1. Originality/value In the present research, a convenient, inexpensive and reproducible method for the detection of MG was developed. The developed sensor is capable of competing against the conventional techniques in terms of speed, stability and economy.

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Section: Resultsmentioning

confidence: 97%

Kinetic study and characterization of a platinum electrode/sensitive membrane for malachite green detection

Ghodbane

Kherrrat

Zougar

et al. 2018

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“…[79][80][81][82][83][84][85][86][87][88] Such procedures involve transfer of analytes from the biodiesel sample to another immiscible solvent (usually simpler than the sample matrix, non-toxic and less hazardous to the environment); the process is usually assisted by mechanical agitation, 79,80,82,83,85,88 including sonication 84,86,87 or heat 81 followed by centrifugation. [79][80][81][82][83][84][85][86][87][88] Such procedures involve transfer of analytes from the biodiesel sample to another immiscible solvent (usually simpler than the sample matrix, non-toxic and less hazardous to the environment); the process is usually assisted by mechanical agitation, 79,80,82,83,85,88 including sonication 84,86,87 or heat 81 followed by centrifugation.…”

Section: Green Extractionmentioning

confidence: 99%

“…Au, 107,118 Cu, 106 and mainly glassy carbon 56 ), electrolytes, working potentials (for voltammetric/amperometric techniques), and suitable sample pretreatment. Applications to inorganic species have focused on the determination of Cu, 53 K, 78,79,120 P, 83,85,88 Sn, 96 Ca, 121 and the acid number. 10 In some applications, only sample dilution (exploiting the inherently high detectability) 56 or simple analyte extraction has sufficed to avoid matrix effects.…”

Section: Electrochemical Detectionmentioning

confidence: 99%

Greener procedures for biodiesel quality control

2015

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Biodiesel analysis often requires large amounts of chemicals and organic solvents with consequent generation of large waste volumes. However, several environmentally friendly alternatives have been presented for assay of biodiesel quality control parameters. These approaches include direct analysis with reagentless procedures, improved sample preparation by dilution or analyte extraction with nontoxic solvents, preparation of emulsions or microemulsions, and sample mineralisation under mild conditions as well as strategies for minimization of reagent consumption and waste generation. These greener alternatives are critically reviewed, highlighting the advantages and limitations of each approach in biodiesel analysis. Alternative analytical techniques (e.g. flow analysis and electrochemical detection), predictive studies, and measurement of physicochemical parameters are also discussed. A two-nozzle FBMN for nebulisation of biodiesel samples and water, avoiding acid digestion Ca, K, Mg, Na, and P: 0.005-0.5; minor components: 0.001-3 45 4400 | Anal. Methods, 2015, 7, 4396-4418 This journal is

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“…The CMEs can act as an electrocatalyst or as electrochemical sensors, increasing their sensitivity and selectivity (Baldwin & Thomsen, 1991;de Sá, Paim, & Stradiotto, 2014;El-Desoky & Ghoneim, 2011;Mattos, do Carmo, Oliveira, & Stradiotto, 2008;Pournaghi-Azar & Sabzi, 2003;Salimi, Abdi, & Khayatiyan, 2004;Sartori, Zezza, Paim, & Stradiotto, 2014;Sedenho et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Electrocatalitic Detection of Hydrazine Using Chemically Modified Electrodes with Cobalt Pentacyanonitrosylferrate Adsorbed on the 3–Aminopropylsilica Surface

Sá¹,

Maraldi²,

Bonfim³

et al. 2017

IJC

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Cobalt pentacyanonitrosylferrate on the aminopropylsilica silica gel surface (SiCoNP) was previously prepared following two steps. The electrochemical behavior of SiCoNP modified electrode showed two redox couples, the first and second redox couples were observed at anodic potential (Epa) 1 = 0.36 and 0.60 V vs. Ag/AgCl attributed to the oxidation of Co (II) to Co (III) and Fe (II) (CN) 5 NO/Fe (III) (CN) 5 NO, respectively. The modified carbon paste electrode with SiCoNP was tested in the hydrazine electrooxidation. In the hydrazine electrooxidation, the H + release was observed and the two metal centers are involved in this process. The proposed mechanism has been described and based on studies of the effect of hydrogen ion concentration in the redox process of bivalent compound formed. Thus a large increase in hydrogen ion concentration promotes the formation of an intermediate electroactive species with an anodic peak at 0.56 V. The nature of this species is not well established but may be related to protonation of cyanide or NO groups present. The modified graphite paste electrode presented a limit of detection of 2.38×10 -4 mol L -1 and amperometric sensitivity of 1.37×10 -6 A.mol -1 .L.

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Potentiometric determination of phosphorus in biodiesel using chemically modified electrode with cobalt film

Cited by 10 publications

References 21 publications

Kinetic study and characterization of a platinum electrode/sensitive membrane for malachite green detection

Kinetic study and characterization of a platinum electrode/sensitive membrane for malachite green detection

Greener procedures for biodiesel quality control

Electrocatalitic Detection of Hydrazine Using Chemically Modified Electrodes with Cobalt Pentacyanonitrosylferrate Adsorbed on the 3–Aminopropylsilica Surface

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