Determination of Manganese in Natural Media by Anodic Stripping Voltammetry Using a Rotating Solid Silver Amalgam Electrode

Lesven, Ludovic; Skogvold, Silje M.; Mikkelsen, Øyvind; Billon, Gabriel

doi:10.1002/elan.200804377

Cited by 13 publications

(6 citation statements)

References 45 publications

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“…Respective limits of detection of 63 nM and 36 nM for manganese(II) were determined at the drSPE and prSPE. Such low limits of detection offered by the prSPE highlight the excellent electroanalytical applicability of the recessed electrode and improve even over previous reports at an array of recessed electrodes, which boasted a limit of detection of 64 nM, 4 which itself was superior over analytical reports such as spectrophotometric techniques 54 and flow-injection with flame atomic absorption spectrometry, 55 and electroanalytical protocols; [56][57][58][59][60] such a response indicates the greater current density observed at the prSPE due to the greater proportion of edges (point diffusion/mass transport), thus highlighting the beneficial utilisation of the prSPE. We have demonstrated the successful fabrication of highly novel screen printed shallow recessed electrodes.…”

Section: Pentagon-shaped Screen Printed Shallow Recessed Electrodesmentioning

confidence: 66%

Electroanalytical properties of screen printed shallow recessed electrodes

et al. 2012

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We report the fabrication of novel carbon based screen printed disc-shaped recessed electrodes (250 mm radius) which are electrochemically characterised and contrasted to other screen printed sensors previously reported upon within the literature. In these circumstances, the electrode is fabricated entirely through screen printing and the electrode geometry is defined by the dielectric (inert polymer) producing shallow recessed electrodes. In comparison to co-planar carbon screen printed electrodes, the shallow recessed screen printed electrodes exhibit a greater current density over the former. The potential electroanalytical applications of these carbon based disc-shaped shallow recessed electrodes are explored through the sensing of NADH and nitrite exhibiting analytically relevant limits of detection (3s) of 5.2 and 7.28 mM respectively. Additionally, the electroanalytical sensing of nitrite is further trialled in a canal water sample demonstrating the robust nature of the sensors analytical performance. Furthermore we explore the potential improvement of the shallow recessed electrodes through the fabrication of pentagon-shaped carbon based shallow recessed electrodes, which are compared and contrasted with shallow recessed disc electrodes towards the electroanalytical sensing of manganese(II); we believe this to be the first example of such an electrode geometry. In comparison of the observed current density the disc-shaped shallow recessed electrode offers greater sensitivity over co-planar screen printed electrode, whilst in addition to this, a pentagon-shaped recessed electrode offers improved sensitivity over even that of the disc-shaped shallow recessed screen printed electrode. The ultra-low nM sensing of manganese(II) is shown to be possible at both the disc and pentagon shallow recessed electrodes exhibiting limits of detection (3s) found to correspond to 63 and 36 nM respectively. Both the disc and pentagon-shaped shallow recessed screen printed electrodes are determined to offer greater analytical sensitivity as determined within this study and in comparison with previous literature using graphitic electrodes. The fabrication methodology of the shallow recessed electrodes is shown to be generic in nature such that the underlying carbon layer, which defines the composition of the shallow recessed working electrode, can be replaced with electrocatalytic surfaces. We demonstrate this with the fabrication of platinum disc-shaped shallow recessed screen printed electrodes, which are electrochemically characterised and explored towards the sensing of hydrazine and hydrogen peroxide displaying limits of detection (3s) of 26.3 and 44.3 mM respectively, which are found to be analytically useful.

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Section: Pentagon-shaped Screen Printed Shallow Recessed Electrodesmentioning

confidence: 66%

Electroanalytical properties of screen printed shallow recessed electrodes

et al. 2012

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“…ASV of Mn in NH 4 Cl has been done and shown to give repeatable and reliable results on a rotating solid silver amalgam electrode in 0.05 M NH 4 Cl solution [32]. For this reason, aqueous solutions consisting of 0.05 M NH 4 Cl (pH 4.5) with 1.5 mM Mn 2+ were prepared and studied using cyclic voltammetry on MCFCNT electrodes to characterize the redox behavior of Mn.…”

Section: Resultsmentioning

confidence: 99%

Manganese Detection with a Metal Catalyst Free Carbon Nanotube Electrode: Anodic versus Cathodic Stripping Voltammetry

Yue

Bange

Riehl³

et al. 2012

Electroanalysis

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Anodic stripping voltammetry (ASV) and cathodic stripping voltammetry (CSV) were used to determine Mn concentration using metal catalyst free carbon nanotube (MCFCNT) electrodes and square wave stripping voltammetry (SWSV). The MCFCNTs are synthesized using a Carbo Thermal Carbide Conversion method which results in a material that does not contain residual transition metals. Detection limits of 120 nM and 93 nM were achieved for ASV and CSV, respectively, with a deposition time of 60 s. CSV was found to be better than ASV in Mn detection in many aspects, such as limit of detection and sensitivity. The CSV method was used in pond water matrix addition measurements.

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“…Tanto o procedimento de amalgamação natural como o de amalgamação mecânica possibilitam que eletrodos de diferentes áreas geométricas e diferentes formas possam ser facilmente construídos, inclusive eletrodos rotatórios. 47 Além disto, SAE com diferentes composições entre metal e mercúrio podem ser facilmente obtidos para aplicações especiais, tais como em processos redox, onde podem ocorrer interações específicas entre o analito e o metal da amálgama, como as reações que ocorrem com os aminoácidos. 10 A formação de complexos entre o analito de interesse e o metal do SAE também pode promover uma considerável melhora na seletividade analítica e pode ser facilmente observada, devido à simplicidade na preparação de SAE.…”

Section: Fácil Construçãounclassified

Utilização de eletrodos sólidos de amálgama para a determinação analítica de compostos orgânicos e inorgânicos

Souza¹,

Melo²,

Correia³

et al. 2011

Quím. Nova

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Recebido em 17/4/10; aceito em 28/9/10; publicado na web em 26/1/11 UTILIZATION OF THE SOLID AMALGAM ELECTRODES IN THE ANALYTICAL DETERMINATION OF ORGANIC AND INORGANIC COMPOUNDS. This review reports the use of solid amalgam electrodes in the electroanalytical determination of organic and inorganic compounds. The different types of amalgam electrodes are presented, and attention is paid to solid amalgam electrode, and here is presented details about the pre-treatment for activation and renovation and also possible modifications in its surface. The wide potential range, higher signal-to-noise ratio, mechanical stability enabling their application in flowing systems, and principally their resistance toward passivation, indicate that the solid amalgam electrodes are environmentally friendly alternatives to mercury electrodes, without loss in the sensitivity and reproducibility in voltammetric responses.Keywords: solid amalgam electrodes; mercury; environmentally friendly sensor. CONSIDERAÇÕES GERAISO emprego de quaisquer técnicas voltamétricas possibilita que informações sobre a concentração e a identidade de compostos orgânicos e inorgânicos possam ser obtidas a partir da variação sistemática do potencial elétrico do eletrodo de trabalho, que promove o surgimento de uma resposta de corrente em função do potencial aplicado.1 Além disto, os métodos voltamétricos podem ser utilizados em estudos fundamentais de processos de oxidação e redução em vários eletrólitos e solventes, na determinação de constantes de equilíbrio, constantes de formação de complexos, constantes cinéti-cas de processos redox e, também, na determinação de processos de adsorção na superfície de eletrodos. 3 Nos últimos 15 anos, a utilização de técnicas voltamétricas tem aumentado intensamente, principalmente em função dos avanços tecnológicos que propiciaram o desenvolvimento de diferentes técnicas envolvendo a aplicação de pulsos de potencial, as quais são poderosas ferramentas para determinações analíticas e estudos de reações de transferência de carga na interface eletrodo-solução.Considerando-se o uso de parâmetros experimentais e voltamé-tricos previamente otimizados, as técnicas voltamétricas modernas, tais como, a voltametria de pulso diferencial, 4 a voltametria de onda quadrada 5,6 e a voltametria de ondas quadradas múltiplas, 7 são capazes de fornecer sensibilidade analítica similar e, algumas vezes, até melhor do que aquela obtida com o emprego das técnicas cromatográficas de separação e detecção ou das técnicas espectroscópicas. As técnicas voltamétricas ainda apresentam a vantagem de minimização do tempo e dos custos das análises e a possibilidade de especiação química.Contudo, o sucesso no emprego de técnicas voltamétricas modernas não está relacionado apenas à escolha da forma de aplicação dos pulsos de potenciais, que caracteriza a técnica empregada, mas principalmente à escolha adequada do eletrodo de trabalho, isto porque as respostas de corrente obtidas são sempre relacionadas às reações redox que ocorrem na superfície do eletro...

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Determination of Manganese in Natural Media by Anodic Stripping Voltammetry Using a Rotating Solid Silver Amalgam Electrode

Cited by 13 publications

References 45 publications

Electroanalytical properties of screen printed shallow recessed electrodes

Electroanalytical properties of screen printed shallow recessed electrodes

Manganese Detection with a Metal Catalyst Free Carbon Nanotube Electrode: Anodic versus Cathodic Stripping Voltammetry

Utilização de eletrodos sólidos de amálgama para a determinação analítica de compostos orgânicos e inorgânicos

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