Dating Archeological Lead Artifacts from Measurement of the Corrosion Content Using the Voltammetry of Microparticles

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• 作者：Antonio Dome虂nech-Carbo虂 ; Mari虂a Teresa Dome虂nech-Carbo虂 ; Mari虂a Amparo Peiro虂-Ronda
• 刊名：Analytical Chemistry
• 出版年：2011
• 出版时间：July 15, 2011
• 年：2011
• 卷：83
• 期：14
• 页码：5639-5644
• 全文大小：794K
• 年卷期：v.83,no.14(July 15, 2011)
• ISSN：1520-6882

文摘

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 PbO₂ 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 (伪 = 0.070 卤 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 卤150 years for the most ancient samples in this study.