Fast and non-destructive identification of dental alloys by abrasive stripping voltammetry

Scholz, Fritz; Müller, W.-D.; Nitschke, L.; Rabi, F.; Livanova, L. D.; Fleischfresser, C.; Thierfelder, C. M.

doi:10.1007/bf00322781

Cited by 27 publications

(9 citation statements)

References 9 publications

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“…Electroanalysis can provide information on the composition of powder mixtures [2], minerals [3] and alloys [4], as well as on the structure of some solid compounds [5]. Besides, it was applied for the detection of electroactive impurities in inert solid samples [6], such as manganese ions in carbonate sediments [7], and for the identi®cation of solid contaminants, such as traces of cocaine on paper [8].…”

mentioning

confidence: 99%

Voltammetry of Organic Microparticles

1999

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Solid microparticles of several different insoluble organic compounds were mechanically immobilized on the surface of graphite electrodes and immersed into a liquid electrolyte in order to study their electrochemical reactions. Cyclic staircase voltammetry and square-wave voltammetry were used. Quinhydrone was found to be a stable intermediate in the reversible redox reaction of solid quinone and hydroquinone on the electrode surface. The reaction occurs on the surface of the solid particle which is in contact with water. Indigo can be reduced to leucoindigo and oxidized to dehydroindigo in two separate reversible redox reactions. In strongly basic medium indigo dissolves in water upon electroreduction. A hydroacridine radical was detected as a stable intermediate in the electrochemically irreversible redox reaction of acridine and dihydroacridine. Famotidine can be electrooxidized and the product of this reaction can be electroreduced in two separate chemically irreversible reactions. Probucol is oxidized to a semiquinone radical which can be re-reduced in an electrochemically irreversible redox reaction. Propylthiouracil can be also oxidized to an unknown product which can be re-reduced in a chemically reversible, but slow solid state surface redox reaction. Reductions of solid thionicotinoylanilide and nicotinoylanilide are totally irreversible.

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confidence: 99%

Voltammetry of Organic Microparticles

1999

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“…The most used working electrodes are mercury based such as HMDE, SMDE and MFE for measuring reducible species for the analysis of drugs. These electrodes offer the advantages of not needing surface cleaning, reproducible surface area and electrochemical response and can be used in a wide negative potential range [70][71][72][73][74][75][76][77][78][79][80][81][82][83][84][115][116][117][118][119][120][121][122][123].…”

Section: Adsorptive Stripping Voltammetrymentioning

confidence: 99%

“…At chemically modified electrodes (CME), not only purely adsorptive accumulation, but also chemisorption can take place under controlled conditions. Metallic and carbon based solid electrodes are suitable for studying adsorbable substances that can be oxidised at the electrode [115][116][117][118][119][120][121][122][123][124][125][126][127][128].…”

Section: Adsorptive Stripping Voltammetrymentioning

confidence: 99%

Electroanalytical Techniques Most Frequently Used in Drug Analysis

Özkan

Kauffmann

Zuman

2015

Monographs in Electrochemistry

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“…VMP can be applied to all solid compounds which contain at least one electrochemically active element, so, it has been used in direct analysis of alloys [1,5], dental amalgams [10,11], minerals [2, 4, 12±14], powder mixtures [15], oxides [16,17], pesticides [18], insoluble substances [19], complexes and pigments [20±22] or manganese dioxides in rechargeable batteries [23].…”

Section: Introductionmentioning

confidence: 99%

“…It has been shown that VMP provides a quick and simple method of quantitative analysis of the composition of binary alloys [1,5,10,11], although there are some limitations, as the relative standard deviations between 5 and 15 % and the use only for the relative quanti®cation of electroactive components [9].…”

Section: Introductionmentioning

confidence: 99%