6533b7cffe1ef96bd1259758
RESEARCH PRODUCT
Electrochemical Characterization of Egyptian Blue Pigment in Wall Paintings Using the Voltammetry of Microparticles Methodology
Estrella Arcos Von HaartmanAntonio Doménech-carbóFrancisco M. Valle-algarraMaría Teresa Doménech-carbóFrancisco López-lópezLaura Osete-cortinasubject
Tafel equationMaterials scienceAqueous solutionMineralogyElectrochemistryAnalytical ChemistryEgyptian bluechemistry.chemical_compoundPigmentScanning electrochemical microscopychemistryvisual_artElectrochemistryvisual_art.visual_art_mediumTernary operationVoltammetryNuclear chemistrydescription
The solid state voltammetric response of Egypt blue, Han blue and ploss blue pigments upon attachment to graphite electrodes in contact with aqueous phosphate buffer at pH 7.0 is studied by voltammetry of microparticles and scanning electrochemical microscopy. Such voltammetric responses, combined with those for synthetic specimens consisting of binary mixtures of the pigment and SiO2 or CaCO3 as well as ternary ones of CaCO3 and SiO2 mixtures allow for the identification of the pigment and the support in samples from wall paintings using different electrochemical parameters, in particular upon performing the Tafel and modified Tafel analysis of voltammetric peaks. Identification of Egypt blue in microsamples of murals from a Roman archaeological site in Castulo (Jaen, Spain) is discussed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-11-06 | Electroanalysis |