Evidence concerning oxidation as a surface reaction in Baltic amber

Gianluca Pastorelli, Yvonne Shashoua, Jane Richter

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Abstract

The aim of this study was to provide evidence about oxidation as a surface reaction during degradation of Baltic amber. A clear understanding of the amber-oxygen interaction modalities is essential to develop conservation techniques for museum collections of amber objects. Pellet-shaped samples, obtained from pressed amber powder, were subjected to accelerated thermal ageing. Cross-sections of the pellets were analyzed by infrared micro-spectroscopy, in order to identify and quantify changes in chemical properties. The experimental results showed strong oxidation exclusively at the exterior part of cross-sections from samples subjected to long-term thermal ageing, confirming that oxidation of Baltic amber starts from the surface.

Original languageEnglish
JournalSpectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Volume89
Pages (from-to)268-269
Number of pages2
DOIs
Publication statusPublished - 2012

Keywords

  • baltic amber
  • degradation
  • oxidation
  • hydrolysis
  • conservation

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