Analysis of Some Selected Persistent Organic Chlorinated Pesticides in Marine Water and Food Stuffs by Differential Pulse‐Cathodic Stripping Voltammetry

El-Shahawi, M.S.; Hamza, A.; Bashammakh, Abdulaziz S.; Al-Sibaai, A.A.; Alsaggaf, Wejdan T.

doi:10.1002/elan.201000581

Cited by 12 publications

(5 citation statements)

References 32 publications

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“…11 Electroanalytical methods, due to their accuracy, sensitivity, relative simplicity, low costs and portable field-based equipment, have also been frequently used for analyzing trace antimony. 1,[12][13][14][15][16][17][18] Among these electrochemical techniques, adsorptive cathodic stripping voltammetry (AdCSV) is a significantly sensitive and effective technique for the determination of trace amount of metal ion. 14,[18][19][20] The Ad-CSV procedures developed for the determination of antimony were based on the adsorptive accumulation of an antimony complex on the electrode surface with different organic complexing ligands such as 2 ,3,4 ,5,7-pentahydroxyflavone(morin), 13 pyrogallol, 17 4-(2thiazolylazo)-resorcinol (TAR), 14 catechol.…”

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“…1,[12][13][14][15][16][17][18] Among these electrochemical techniques, adsorptive cathodic stripping voltammetry (AdCSV) is a significantly sensitive and effective technique for the determination of trace amount of metal ion. 14,[18][19][20] The Ad-CSV procedures developed for the determination of antimony were based on the adsorptive accumulation of an antimony complex on the electrode surface with different organic complexing ligands such as 2 ,3,4 ,5,7-pentahydroxyflavone(morin), 13 pyrogallol, 17 4-(2thiazolylazo)-resorcinol (TAR), 14 catechol. 18 The majority of these electrochemical procedures were traditionally conducted on a hanging mercury drop electrode (HMDE) 13,14,17 or the mercury film electrode (MFE) 1 prepared by electroplating a thin film of mercury on a suitable substrate such as glassy carbon electrode.…”

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“…14,[18][19][20] The Ad-CSV procedures developed for the determination of antimony were based on the adsorptive accumulation of an antimony complex on the electrode surface with different organic complexing ligands such as 2 ,3,4 ,5,7-pentahydroxyflavone(morin), 13 pyrogallol, 17 4-(2thiazolylazo)-resorcinol (TAR), 14 catechol. 18 The majority of these electrochemical procedures were traditionally conducted on a hanging mercury drop electrode (HMDE) 13,14,17 or the mercury film electrode (MFE) 1 prepared by electroplating a thin film of mercury on a suitable substrate such as glassy carbon electrode. Despite the advantages of mercury electrodes for stripping voltammetry, the toxicity of mercury or mercury salts causes risks to public health and unavoidable contamination of the environment in practice.…”

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Determination of Trace Antimony by Square-Wave Adsorptive Cathodic Stripping Voltammetry at an Ex Situ Prepared Bismuth Film Electrode

Zhong

et al. 2014

J. Electrochem. Soc.

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A square-wave adsorptive cathodic stripping voltammetric protocol to determine trace antimony(III) in the presence of gallic acid (GA) at an ex situ prepared bismuth film electrode (BiFE) has been investigated. A well-defined and sensitive stripping peak of the Sb(III)-gallic acid complex was observed at −0.53 V (vs. SCE) in a 0.1M acetate buffer solution (pH 4.8) at a deposition potential of −0.38 V (120 s). The experimental variables as well as potential interferences were studied. Compared with the ex situ mercury film electrode (MFE), the ex situ prepared BiFE displayed a better electroanalytical performance for the determination of antimony(III). Under the optimized conditions, the linear range was obtained between 2-25 μg/L, the limit of detection for antimony(III) was 60 ng/L and the relative standard deviation was 3.37% at the 10 μg/L level (n = 10). This method was applied to determine trace amounts of antimony in several environmental samples with the satisfactory results.

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Determination of Trace Antimony by Square-Wave Adsorptive Cathodic Stripping Voltammetry at an Ex Situ Prepared Bismuth Film Electrode

Zhong

et al. 2014

J. Electrochem. Soc.

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“…101 Alguns mecanismos de reações envolvendo a redução eletroquímica de fármacos no HMDE estão listados na Tabela 2. foram estudados a fim de determinar a contaminação e persistência de defensivos utilizados nos cultivares. [109][110][111][112][113] Um método voltamétrico para a determinação do inseticida cifenotrina em formulações, vegetais e grãos foi desenvolvido por Kumar e Sreedhar. Pulso diferencial e o eletrodo HMDE foram empregados nas determinações voltamétricas em formulações, repolhos, tomates, trigo e arroz.…”

Section: Determinação De Compostos Orgânicos Usando Hmdeunclassified

A Versatilidade Do Eletrodo De Gota Pendente De Mercúrio Em Química Analítica – Uma Revisão Sobre Recentes Aplicações

Nunes¹,

Anjos²,

Quináia³

2017

Quim. Nova

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THE VERSATILITY OF THE HANGING MERCURY DROP ELECTRODE IN ANALYTICAL CHEMISTRY -A REVIEWABOUT RECENT APPLICATIONS. Voltammetry using mercury electrode as working electrode has been employed in the determination of organic and inorganic compounds in several samples. A review on the applications of this analytical tool is present, covering the period of the last ten years. The emphasis of this work is directed to the hanging mercury drop electrode (HMDE), its advantages, disadvantages and applications. Voltammetric measurements are easily carried out, and present low cost. The review discusses that the use of mercury in the measurements can be a limitation due the toxicity of the element. However, nowadays the necessary of volume of Hg in the measurements is very small, and it can be reused. Thus, the correct disposal of the small amount of waste generated can be minimize environmental risks and human health, according to the principles of Green Chemistry.Keywords: applications; mercury electrode; review; voltammetry. INTRODUÇÃOTécnicas eletroquímicas têm sido usadas por muitos anos devido as suas características vantajosas, tais como elevada frequência analí-tica, simplicidade, baixo custo, capacidade de detecção em níveis de concentração baixa, resposta dependente das formas químicas de um mesmo elemento, análise de misturas, entre outras. Os primeiros estudos eletroquímicos iniciaram no século XVIII na Itália e evoluíram até os métodos atuais, envolvendo diversos tipos de eletrodos indicadores e de trabalho, como eletrodos sólidos, de mercúrio, ultramicroeletrodos, etc.1-4 Cada tipo de eletrodo desenvolvido possui vantagens e desvantagens intrínsecas. Eletrodos de trabalho sólidos, por exemplo, apresentam como vantagem a possibilidade de serem modificados, aumentando assim sua seletividade, além de possuírem diversas formas e tamanhos que ampliam sua aplicabilidade. Entretanto, processos de limpeza e polimento são comumente necessários devido ao envenenamento da superfície eletrolítica, que podem comprometer a reprodutibilidade de sua área superficial. O eletrodo de gota pendente de mercúrio, do inglês hanging mercury drop electrode (HMDE), por sua vez, por ser renovável apresenta excelente reprodutibilidade, uma superfície extremamente lisa e uniforme a cada gota. Além disso, um elevado sobrepotencial à redução de hidrogênio, uma ampla faixa negativa de potencial (de 0 a -2 V dependendo do eletrólito suporte) assim como a superfície reprodutível a cada gota, são vantagens deste eletrodo.5 Entretanto, o HMDE apresenta baixa resistência mecâni-ca, limitando suas aplicações, bem como relativa seletividade para compostos orgânicos, pode sofrer com interferências causadas por matéria orgânica dissolvida em amostras ambientais, estreita faixa de trabalho na região anódica, etc. Além disso, muitas discussões vêm sendo realizadas com relação à toxicidade do mercúrio e a necessidade de buscar materiais alternativos para o desenvolvimento de outros eletrodos de trabalho mais condizentes com os aspectos de Química Verde. ...

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“…7 Despite the use of chromatographic techniques for pesticide assays generally, [8][9][10] voltammetric techniques can also be preferred since they offer simple and less expensive procedures that allow for precise determination in complex solutions, which oen require minimum pretreatment. [11][12][13] To date, various analytical techniques for the determination of trace amounts of anilide herbicides, such as an amperometric sensor for propanil, 14 gas chromatography for acetanilide herbicides, 9 liquid chromatography-mass spectrometry for mefenacet, 15 differential pulse cathodic stripping voltammetry for alachlor, 16 chemiluminescent assay for propanil, 17 differential pulse voltammetry for phenacetin and paracetamol 18 have been used. The oxidation mechanisms of the herbicides propanil and phenacetin were studied by square-wave potential pulses using a platinum disk electrode 19 and by cyclic, differential pulse, and square wave voltammetry using a glassy carbon microelectrode.…”

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confidence: 99%

Electrooxidation and determination of methacetin (p-acetanisidide) by square wave voltammetry using multiwalled carbon nanotube electrode

2013

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A multiwall carbon nanotube paste electrode (MWCNTPE) was fabricated to investigate the detailed electrochemical behavior of methacetin and achieve its sensitive electroanalytical determination. The sensitive and selective square wave anodic peak seen at +1.06 V was linearly related to methacetin concentration in the range of 0.11 to 22.3 mg L À1 [0.665 to 135 mM]. The limit of detection (LOD) and the limit of quantification (LOQ) were 0.032 mg L À1 [0.193 mM] and 0.11 mg L À1 [0.665 mM],respectively. The percentage recovery of methacetin calculated from natural lake water samples spiked at the 5.0 mg mL À1 [30.3 mM] level was 94.2% with a relative standard deviation of 0.21%. The considerably high recoveries and low standard deviations were evidence for the high accuracy and precision of the recommended method. The recovery of 10.0 mg mL À1 [60.5 mM] methacetin in the presence of the same concentrations of other pesticides such as benzanilide, propanil, tribenuron methyl, rimsulfuron, metsulfuron methyl and chlorsulphuron ranged from 89.2% to 98.3%. The oxidation peak of 10 mg L À1 [65.3 mM] dopamine appeared at +0.740 V(vs. Ag/AgCl) and did not display a significant interfering effect, therefore methacetin and dopamine could be simultaneously determined.

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Analysis of Some Selected Persistent Organic Chlorinated Pesticides in Marine Water and Food Stuffs by Differential Pulse‐Cathodic Stripping Voltammetry

Cited by 12 publications

References 32 publications

Determination of Trace Antimony by Square-Wave Adsorptive Cathodic Stripping Voltammetry at an Ex Situ Prepared Bismuth Film Electrode

Determination of Trace Antimony by Square-Wave Adsorptive Cathodic Stripping Voltammetry at an Ex Situ Prepared Bismuth Film Electrode

A Versatilidade Do Eletrodo De Gota Pendente De Mercúrio Em Química Analítica – Uma Revisão Sobre Recentes Aplicações

Electrooxidation and determination of methacetin (p-acetanisidide) by square wave voltammetry using multiwalled carbon nanotube electrode

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