1. Laboratory of Archaeometry, Department of History, Archaeology and Cultural Resources Management, University of the Peloponnese, 24100 Kalamata, Greece
2. Ephorate of Antiquities of Achaia, Ministry of Culture, Education and Religious Affairs, 26110 Patras, Greece
3. Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 11635 Athens
4. Instituto Universitario de investigación en Ciencias Ambientales de Aragó (IUCA), Departamento de Química Analítica, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza, Spain