Bismuth Film Anodic Stripping Voltammetry for the Determination of Lead in Kerosene: A Metrological Study

Miguel, Eliane Monsores; Cunha, Alessandra L. M. C. da; Pacheco, Wagner F.; Farias, Pércio Augusto Mardini; Aucélio, Ricardo Q.

doi:10.1002/elan.200900518

Cited by 13 publications

(12 citation statements)

References 5 publications

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“…Moreover, BiFEs present some advantages over mercury film electrodes: Bi is by far less toxic than Hg and, therefore, BiFEs are environmental‐friendly electrodes, BiFEs are less susceptive to interferences from dissolved oxygen than mercury electrodes 9, 44 and finally BiFEs can be used in both acidic or strongly alkaline media 47, making them more versatile than mercury film electrodes. Therefore, BiFEs are the best alternative to mercury for heavy metals determination by ASV, which is demonstrated by the large number of works using BiFEs for metal ions determination 4, 5, 10–14, 22, 34.…”

Section: Introductionmentioning

confidence: 99%

“…All these positive aspects are combined with a relatively inexpensive instrumentation and low operator training requirements. Thus, the simplicity and great analytical performance of ASV have allowed its successful use to quantify metal ions in different kinds of samples, such as: water 2–14, food 15 and soil samples 16; fruit juices 17; alcoholic beverages 18–20; biodiesel 21, 22; ethanol fuel 23–31 and petroleum‐based fuels, such as gasoline 32, 33 and kerosene 34.…”

Section: Introductionmentioning

confidence: 99%

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Combining Alkaline Extraction and in Situ Plated Bismuth Film for Reliable Quantification of Zn in Multivitamin Formulations

2015

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In this work a bismuth film electrode (BiFE) plated in situ onto glassy carbon was used to quantify Zn2+ in multivitamin formulation samples by square wave anodic stripping voltammetry. For partially water‐soluble multivitamin tablets, an alkaline extraction with 1.0 mol L−1 NaOH aqueous solution was adopted. This procedure was simple, fast and efficient to extracting Zn from sample matrix. Moreover, this procedure was able to make the method less susceptible to interferences from Cu2+, since it remains at extracting vessel as insoluble Cu(OH)2. For fully water‐soluble effervescent tablets, sample pretreatment was not required.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Combining Alkaline Extraction and in Situ Plated Bismuth Film for Reliable Quantification of Zn in Multivitamin Formulations

2015

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“…Dentre esses métodos pode-se destacar a espectrometria de absorção atômica em forno de grafite, [6][7][8] espectrometria de massas com plasma indutivamente acoplado (ICP-MS) e a voltametria. [9][10][11][12][13][14] As demais técnicas instrumentais necessitam de alguma etapa prévia de pré-concentração.…”

Section: Introductionunclassified

DEVELOPMENT OF A SYSTEM FOR Cd PRE CONCENTRATION ON XAD-4 RESIN MODIFIED WITH FENILFLUORONA AND DETERMINATION BY ATOMIC ABSORPTION SPECTROMETRY

et al. 2016

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. Cadmium is considered a potentially toxic element, since it doesn't perform any biological function and is highly cumulative. This element is usually found in environmental samples in very low concentrations. For this reason, there is a necessity to develop methods that allow sufficiently low detection limits. From this perspective, a simple, sensitive, selective and low cost methodology was developed for the determination of Cd by F AAS. The system involves the on-line pre concentration of cadmium onto a commercial polystyrene divinil benzene (PSDV) resin modified with phenylfluorone (PF). The experimental conditions (both chemical and physical) were optimized to achieve highest sensitivity. The modified resin had high chemical and physical resistance, and could be reused for 300 cycles without compromising the system's sensitivity. The obtained enrichment factor was around 8 times and accuracy, calculated as relative standard deviation (RSD), of 5.5% for cadmium concentration of 40 µg L , respectively. This methodology proved to be applicable for samples of river waters, in which matrix interferences were not observed. In these samples recovery tests were conducted in order to evaluate the accuracy of the method, and these results varied between 89 and 118%.Keywords: cadmium; phenylfluorone; XAD-4; FAAS. INTRODUÇÃOO cádmio é um elemento de grande destaque econômico devido a sua vasta aplicação industrial, entre essas aplicações pode-se destacar: sua utilização na fabricação de pilhas e baterias recarregáveis, na constituição de materiais anticorrosivos e como constituinte na fabricação de diversas tintas.1,2 No entanto, essa grande aplicação acarreta uma preocupação ambiental, pois o descarte inadequado desses produtos no solo ou em corpos hídricos pode resultar na contaminação destes.Por ser um elemento não biodegradável, o cádmio tende a ser absorvido e acumulado nos diferentes níveis tróficos, no processo de bioacumulação. A contaminação da cadeia alimentar provoca um aumento da concentração do contaminante a cada nível, o que potencializa seus efeitos tóxicos e cancerígenos. . Poucas técnicas instrumentais possuem limites de detecção suficientes para determinação de Cd ou outros íons metálicos nos níveis de concentração nos quais essas espécies são tóxicas. Dentre esses métodos pode-se destacar a espectrometria de absorção atômica em forno de grafite, 6-8 espectrometria de massas com plasma indutivamente acoplado (ICP-MS) e a voltametria.9-14 As demais técnicas instrumentais necessitam de alguma etapa prévia de pré-concentração.Uma técnica clássica destinada à separação e pré-concentração de metais é a extração líquido-líquido (LLE). 15 A LLE apresenta, no entanto, muitas desvantagens como: gasto excessivo de solventes orgânicos e difícil automação. Neste âmbito, técnicas mais eficientes, menos dispendiosas em tempo e com menor gasto de solvente foram desenvolvidas para extração e pré-concentração de analitos de matrizes complexas, sendo as de maior destaque a microextração líquido-líquido (LLME), a extr...

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“…Lead, for example, is concentrated in the heavy fraction and waste during the processing of crude oil, however, their presence has been detected in various petroleum fractions. Lead is also used as anti‐knock additive in jet fuel (kerosene and gasoline), although there are worldwide restrictions on their use in fuels 5.…”

Section: Introductionmentioning

confidence: 99%

Voltammetric Lead Determination in Aviation Fuel Samples Using a Screen‐Printed Gold Electrode and Batch‐Injection Analysis

2015

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This work presents the lead determination in aviation (bio)fuels using disposable screen‐printed gold electrodes (SPGEs) adapted on a batch‐injection cell associated with a micropipette for portable analysis. The method involves injections of 200 µL of sample or standard solutions at controlled dispensing rate (4.8 µL s−1) during deposition step (−550 mV for 90 s), followed by anodic‐stripping voltammetry. Either samples treated by sonication or dry‐ashing can be analyzed with detection limits of 0.0071 and 0.0008 µg g−1 Pb, respectively. A single SPGE can be applied for 60 consecutive measurements (or 120 for samples dry‐ashed). The ultrasound‐assisted treatment is faster, safer, and easily adapted for on‐site analyses, especially considering the portable characteristics of commercially‐available potentiostats and batch‐injection analysis cell using SPGEs.

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Bismuth Film Anodic Stripping Voltammetry for the Determination of Lead in Kerosene: A Metrological Study

Cited by 13 publications

References 5 publications

Combining Alkaline Extraction and in Situ Plated Bismuth Film for Reliable Quantification of Zn in Multivitamin Formulations

Combining Alkaline Extraction and in Situ Plated Bismuth Film for Reliable Quantification of Zn in Multivitamin Formulations

DEVELOPMENT OF A SYSTEM FOR Cd PRE CONCENTRATION ON XAD-4 RESIN MODIFIED WITH FENILFLUORONA AND DETERMINATION BY ATOMIC ABSORPTION SPECTROMETRY

Voltammetric Lead Determination in Aviation Fuel Samples Using a Screen‐Printed Gold Electrode and Batch‐Injection Analysis

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