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Electrochemical Characterization of Coinage Techniques the 17 th Century: The maravedís Case

2017; Wiley; Volume: 29; Issue: 9 Linguagem: Inglês

10.1002/elan.201700326

1521-4109

Antonio Doménech‐Carbó, María Teresa Doménech‐Carbó, Carla Álvarez Romero, Noemí Montoya, Trinidad Pasíes‐Oviedo, Milagros Buendía,

Conservation Techniques and Studies

Abstract The voltammetry of immobilized particles (VIMP) methodology was applied to the discrimination of Spanish maravedis produced in 10 different mints between 1661 and 1664 using characteristic signatures for the reduction of cuprite and tenorite in the patina of the coins and catalytic effects on the hydrogen evolution reaction (HER). The variation of the apparent tenorite/cuprite ratio with depth was fitted to potential laws differing from one mint to another for A Coruña, Burgos, Córdoba, Cuenca, Granada, Madrid, Trujillo, Segovia, Sevilla and Valladolid coins. Electrochemical data permitted to detect the changes in the composition (with lowering of the silver content) and manufacturing technique (from hammer to mill) occurring in this historical period.