Identification of Manganese(IV) Centers in Archaeological Glass Using Microsample Coatings Attached to PolymerFilm Electrodes

Doménech‐Carbó, A.; Doménech‐Carbó, María Teresa; Osete-Cortina, Laura

doi:10.1002/1521-4109(200107)13:11<927::aid-elan927>3.0.co;2-9

Cited by 35 publications

(21 citation statements)

References 38 publications

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“…As MnO 2 polymorphs exhibit different voltammograms for H + insertion in neutral or alkaline solu- tions 96,149 , the reaction has been recently used for electrochemical analysis of Mn-oxide weathering products on archaeological glass samples 60 . On the other hand, Fe oxides yield usable electrochemical signals, although Fe is rather a less common subject of electroanalysis.…”

Section: Elemental and Phase Analysismentioning

confidence: 99%

“…Voltammetric analysis combines elemental and phase specificity for many compounds, which is advantageous for distinguishing mixtures of isostructural compounds and their solid solutions. This is especially valuable with respect to low amounts of sample needed for electrochemical analysis: routine phase identification has been done with samples of 0.1 mg (refs 57,60 ).…”

Section: Future Prospectsmentioning

confidence: 99%

See 1 more Smart Citation

Electrochemical Analysis of Solids. A Review

Grygar

Marken

Schröder

et al. 2002

Collect. Czech. Chem. Commun.

208

149

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The topic of the review is the electrochemical analysis of solids aimed to identify or determine their phase or elemental composition, analyse the composition of solid mixtures, characterise their electrochemistry-related properties and analyse the redox state of the constituent elements. The ways of the electrode preparation are discussed with a special attention paid to compact and composite electrodes including carbon-paste electrodes, and direct immobilisation of powders on a working electrode. Examples are given of simultaneous electrochemical measurements combined with X-ray diffraction, optical or atomic force microscopy, and mass measurement by quartz microbalance. The state-of-art of voltammetric analysis of inorganic and organic solids achieved in the last two decades is systematically reviewed with the aim to find cases, when electrochemistry can compete successfully with other analytical techniques as for sensitivity, specificity, and sample consumption. Electrochemical methods are shown to be a perspective tool for redox analysis of catalysts, combined elemental and phase analysis of inorganic pigments and minerals, characterisation of solid solutions, metalloorganic and organic solids. A review with 196 references.

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Section: Elemental and Phase Analysismentioning

confidence: 99%

Section: Future Prospectsmentioning

confidence: 99%

Electrochemical Analysis of Solids. A Review

Grygar

Marken

Schröder

et al. 2002

Collect. Czech. Chem. Commun.

208

149

View full text Add to dashboard Cite

show abstract

“…9.1(c)). This is typically a paraffi n-impregnated graphite electrode (PIGE) [1][2][3][4], but [33], graphite powder-polymer composites [36], boron-doped diamond electrodes [51], lead pencil electrodes [52] and indium-doped tin oxide electrodes [53] have also been used. The base electrode can be used as a pencil electrode and pressed on the surface of the material under examination in order to perform local analysis [52,54] and/or layer-by-layer analysis [55], using pressed portable cells [56,57] (see Fig.…”

Section: Electrode Confi Gurationmentioning

confidence: 99%

“…Synergistic combination of VMP with suitable non-electrochemical techniques, namely, microscopy (optical microscopy, scanning electron microscopy coupled with energy dispersive X-ray spectrometry (SEM/EDX), transmission electron microscopy (TEM)), diffraction (mainly X-ray diffraction (XRD)), and spectroscopy (typically, Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and X-ray fl uorescence (XRF)), can provide relevant analytical information for archaeometry, conservation and restoration, as described in recent reviews [30][31][32]. In particular, VMP has been used for analysing inorganic [33] and organic [34] pigments, ceramic [35], glass [36] and glazed [37] materials, textiles [38] and hybrid organic-inorganic archaeological materials [39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical analysis of metallic heritage artefacts: voltammetry of microparticles (VMP)

Doménech‐Carbó

2013

Corrosion and Conservation of Cultural Heritage Metallic Artefacts

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“…Stripping voltammetry (SVA) is the most acceptable method for determining trace amounts of metals in natural waters, especially in on-site and online modes. Two versions of this method, one with an anodic sweep of potential (ASVA) [3][4][5], the other with an cathodic sweep of potential (CSVA) [5][6][7][8][9][10][11][12] are used for determining manganese(II). In the first version of SVA, stationary mercury and mercury-film electrodes are used, whereas the second version of SVA employs both mercury and carbon-containing electrodes (impregnated graphite, glassy-carbon, composite carbon-containing, or modified with polymeric film).…”

mentioning

confidence: 99%

A thick-film graphite-containing electrode modified with formazan for determining manganese in natural and drinking waters by stripping voltammetry

Golovei

Tkach

2005

J Anal Chem

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Manganese is an essential element capable of activating many enzymes involved in the metabolism of humans, animals, and plants. Manganese enters living organisms from the environment, in which it is present mainly as hydrated Mn 2+ . The latter can be oxidized under aerobic conditions to give Mn 3+ or Mn 4+ , which form soluble and insoluble compounds. The concentration of manganese in natural water varies from 0.0001 to 1 mg/L and may attain 50 mg/L in contaminated water [1]. The maximum permissible concentration (MPCs) for manganese is 0.01 mg/L in fresh water and 0.05 mg/L in sea water [2].Spectrophotometry and atomic-absorption spectrometry are used for determining trace manganese(II) in environmental samples. These methods require the preconcentration of manganese, which complicates and prolongs analysis. Stripping voltammetry (SVA) is the most acceptable method for determining trace amounts of metals in natural waters, especially in on-site and online modes. Two versions of this method, one with an anodic sweep of potential (ASVA) [3][4][5], the other with an cathodic sweep of potential (CSVA) [5][6][7][8][9][10][11][12] are used for determining manganese(II). In the first version of SVA, stationary mercury and mercury-film electrodes are used, whereas the second version of SVA employs both mercury and carbon-containing electrodes (impregnated graphite, glassy-carbon, composite carbon-containing, or modified with polymeric film). The determination of manganese(II) by ASVA is associated with a number of problems that restrict its wide use. Among these are the high negative accumulation potential of manganese (-1.7 V), which lies in the region of hydrogen liberation; the low solubility of manganese in mercury; and the formation of intermetallic compounds at mercury electrodes. On the whole, these problems may result in random and systematic errors and deteriorate the sensitivity of analysis. CSVA offers greater promise, because it can be performed without mercury and eliminates the effect of dissolved oxygen and elements forming intermetallic compounds with manganese. Ligands forming complexes with manganese(II) are introduced into the supporting electrolyte or into the indicator electrode to reduce the detection limit for manganese and enhance the reversibility of its Red/Ox system [13,14]. Diphenylcarbazone has been found to be very promising. The detection limit for manganese(II) found with the use of this electrode modified with diphenylcarbazone was 5 × 10 − 9 M at an accumulation time of 600 s [14].In our opinion, continuation of the work devoted to the further investigation and use of a wider spectrum of formazans in the mercury-free voltammetric determination of metals is of particular scientific and practical interest. This work is dedicated to the development of a procedure for determining manganese(II) by CSVA using new mercury-free electrodes modified with formazans with the aim of lowering the detection limit for manganese and enhancing the rapidity of analysis. EXPERIMENTALThe reagents used were...

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Identification of Manganese(IV) Centers in Archaeological Glass Using Microsample Coatings Attached to PolymerFilm Electrodes

Cited by 35 publications

References 38 publications

Electrochemical Analysis of Solids. A Review

Electrochemical Analysis of Solids. A Review

Electrochemical analysis of metallic heritage artefacts: voltammetry of microparticles (VMP)

A thick-film graphite-containing electrode modified with formazan for determining manganese in natural and drinking waters by stripping voltammetry

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