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Domenech-Carbo A.,University of Valencia | Domenech-Carbo M.T.,Polytechnic University of Valencia | Peiro-Ronda M.A.,Museu de Prehistoria de Valencia
Analytical Chemistry | Year: 2011

A methodology for dating archeological lead artifacts based on the voltammetry of microparticles is described. This methodology is based on the comparison of the height of specific voltammetric features from PbO 2 and PbO corrosion products formed under long-term alteration conditions. Calibration of the method was performed with the help of a series of well-documented lead pieces from the funds of different museums of the Comunitat Valenciana (Spain) covering from the fifth century B.C. to present day. The variation of peak currents with the time of corrosion can be fitted to the same potential rate law as that found by Reich (α = 0.070 ± 0.005), using measurements on the Meissner fraction in the superconducting state of lead. The proposed electrochemical methodology enables the dating of archeological lead artifacts with a time-dependent uncertainty estimated to be ±150 years for the most ancient samples in this study. © 2011 American Chemical Society. Source


Domenech-Carbo A.,University of Valencia | Domenech-Carbo M.T.,Polytechnic University of Valencia | Peiro-Ronda M.A.,Museu de Prehistoria de Valencia | Martinez-Lazaro I.,Instituto Valenciano Of Conservacion | Barrio-Martin J.,Autonomous University of Madrid
Journal of Solid State Electrochemistry | Year: 2012

The application of the voltammetry of microparticles methodology to date archaeological lead artifacts, based on the time-dependent formation of different layers of lead oxides, whose relative amount can be estimated from polarization curves and electrochemical impedance spectroscopy (EIS), is presented. This approach is complemented by additional data using square wave voltammetry data. Calibration of the method was performed with the help of a series of welldocumented, lead pieces from the funds of different Spanish museums, covering since the 7th century BC to nowadays. © Springer-Verlag 2012. Source


This paper deals with the consumption of marine molluscs during the early Neolithic in the central region of eastern Iberia. We analyse the bromatological features of six mala-cological collections recovered from six coastal sites in Valencia: Cova de les Cendres, Cova de Bolumini, Cova Ampia, Costamar, El Bananquet and Tossal de les Basses. We identify two groups that refer to two different ecosystems. On the one hand, there is a rocky coastal ecosystem where Patella outnumbers Osilinus and Stramonita. On the other hand, the explotation of coastal lagoons to gather Cerastoderma glaucum has been recorded in other archaeological sites. Source


Domenech-Carbo A.,University of Valencia | Domenech-Carbo M.T.,Polytechnic University of Valencia | Peiro-Ronda M. A.,Museu de Prehistoria de Valencia
Electroanalysis | Year: 2011

Voltammetry of microparticles is applied to the identification of lead corrosion products by means of an essentially non-invasive 'one-touch' technique based on the use of graphite pencil. This methodology permits the mechanical attachment of few nanograms of sample from the surface of lead archaeological artefacts to a paraffin-impregnated graphite electrode, which, upon immersion in aqueous electrolytes, provides distinctive voltammetric responses for litharge and cotunnite- anglesite-, cerusite-based corrosion products. The reported method is applied to the identification of corrosion products in archaeological lead pieces from different Iberian sites in Valencia (Spain). © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source


Domenech-Carbo A.,University of Valencia | Domenech-Carbo M.T.,Polytechnic University of Valencia | Capelo S.,University of Lisbon | Capelo S.,University of Evora | And 2 more authors.
Angewandte Chemie - International Edition | Year: 2014

A method for dating copper/bronze archaeological objects aged in atmospheric environments is proposed based on the specific signals for cuprite and tenorite corrosion products measured through the voltammtry of microparticles method. The tenorite/cuprite ratio increased with the corrosion time and fitted to a potential law that yielded a calibration curve usable for dating purposes. The dating game: A method for dating copper/bronze archaeological objects (see example) aged in atmospheric environments is proposed based on the measurement of specific voltammetric signals for cuprite and tenorite corrosion products. The tenorite/cuprite ratio increased with the corrosion time, fitting to a potential law that yielded a calibration curve usable for dating purposes. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

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