Determination of phosphorus in biodiesel using 1:12 phosphomolybdic modified electrode by cyclic voltammetry

Zezza, Tina Rita Celli; Castilho, Michelle de Souza; Stradiotto, Nelson Ramos

doi:10.1016/j.fuel.2011.12.035

Cited by 26 publications

(15 citation statements)

References 24 publications

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“…Phosphorus was found in sub-micrometer particles in June only. It may be a combustion product of renewable diesel fuel made of animal and vegetable material, as suggested by Zezza et al (2012), because the MOUDI-sampling in June was performed during the NEXBTL test. However, phosphorus can also originate from lubricating oil (Pirjola et al 2015).…”

Section: Chemical Mass Size Distributionsmentioning

confidence: 99%

Particulate matter characteristics, dynamics, and sources in an underground mine

Saarikoski

Teinilä

Timonen

et al. 2017

Aerosol Science and Technology

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Particulate matter (PM) from mining operations, engines, and ore processing may have adverse effects on health and well-being of workers and population living nearby. In this study, the characteristics of PM in an underground chrome mine were investigated in Kemi, Northern Finland. The concentrations and chemical composition of PM in size ranges from 2.5 nm to 10 mm were explored in order to identify sources, formation mechanisms, and post-emission processes of particles in the mine air. This was done by using several online instruments with high timeresolution and offline particulate sampling followed by elemental and ionic analyses. A majority of sub-micrometer particles (<1 mm in diameter, PM 1 ) originated from diesel engine emissions that were responsible for a rather stable composition of PM 1 in the mine air. Another sub-micrometer particle type originated from the combustion products of explosives (e.g., nitrate and ammonium). On average, PM 1 in the mine was composed of 62%, 30%, and 8% of organic matter, black carbon, and major inorganic species, respectively. Regarding the analyzed elements (e.g., Al, Si, Fe, Ca), many of them peaked at >1 mm indicating mineral dust origin. The average particle number concentration in the mine was (2.3 § 1.4) Ã 10 4 #/cm 3 . The maximum of particle number size distribution was between 30 and 200 nm for most of the time but there was frequently a distinct mode <30 nm. The potential origin of nano-size particles remained as challenge for future studies.

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Section: Chemical Mass Size Distributionsmentioning

confidence: 99%

Particulate matter characteristics, dynamics, and sources in an underground mine

Saarikoski

Teinilä

Timonen

et al. 2017

Aerosol Science and Technology

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“…The mixture was diluted in 0.7 mL of tetrahydrofuran (THF) after 5 µL of polymeric membrane was deposited on the platinum electrode surface (Zougar et al , 2008). The D2HPA was chosen as the receptor because many previous studies have shown its ability to extract the MG present in aqueous solutions (Srivastava et al , 2004; Lee et al , 2007; Mozaffari et al , 2014; Zezza et al , 2012).…”

Section: Methodsmentioning

confidence: 99%

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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“…[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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Determination of phosphorus in biodiesel using 1:12 phosphomolybdic modified electrode by cyclic voltammetry

Cited by 26 publications

References 24 publications

Particulate matter characteristics, dynamics, and sources in an underground mine

Particulate matter characteristics, dynamics, and sources in an underground mine

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

Greener procedures for biodiesel quality control

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