The Provenance of Iron Age Glass Beads: A Chemical and Isotopic Approach


Atasayar Z., Öztürk Ö. O., Bakiler M., Destanoğlu O.

3rd International Congress on Analytical and Bioanalytical Chemistry (3rd ICABC 2021), Elazığ, Türkiye, 22 - 26 Mart 2021, ss.60, (Özet Bildiri)

  • Yayın Türü: Bildiri / Özet Bildiri
  • Basıldığı Şehir: Elazığ
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.60
  • İstanbul Üniversitesi-Cerrahpaşa Adresli: Evet

Özet

The study of production technology and trade of ancient glass became a popular topic of archaeological science research and little is known about the glass produced during the Iron Age. Urartu, founded in the capital Tushpa (Van) on the eastern shore of Lake Van in mid 9th century BCE, was one of the powerful states in the Near East in the Middle Iron Age. During the excavation works at the Mound of Van Fortress, some iron age glass beads have been unearthed. The aim of this study is to identify the recipe used to make these glass beads, based on their chemical and isotopic composition by using Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The chemical fingerprint of the raw materials can be related to geographical locations and some of the chemical characteristics of the raw materials are present in the final product unchanged. In this study, we, therefore, investigated the 87Sr/86Sr ratio of the possible sand raw material from the Lake Van, and the Sr isotopic signature of the glass beads.
The sample preparation procedure was as follows: after 2.4 mL of 12 M HCl, 2.4 mL of 22 M HF, and 1.2 mL of 14 M HNO3 acid solutions were added into the PTFE vessel containing 50 mg of the glass bead sample, it was digested in microwave system under the optimized parameters. When the temperature of the vessel reached to room temperature, the homogenous solution was diluted to 50 mL with ultra pure water (18 MΩ cm-1). The major and trace elements and isotopic ratios of the glass beads were measured using an Agilent 7700e ICP-MS system equipped with Cetac ASX-520 autosampler.