부산대학교 도서관

This research demonstrates the potential of archaeological copper corrosion for organic residue analysis. In archaeology, analysis of metal corrosion has traditionally been limited to the identification of inorganic compounds, thought to result from the interaction of the metal object with the deposition environment. For the first time a range of analytical techniques are used to analyse archaeological copper corrosion, many from Pompeii vessels, revealing the different types of information they contain and how the identified compounds can be articulated into compelling stories. The formation of copper-organic complexes is proposed as a pathway for preservation of organic residues in metal objects. This hypothesis is supported by electrochemical experiments to generate copper corrosion impregnated with organic mixtures and to synthetize copper-organic complexes with characterization by a range of analytical techniques. To address the low solubility of copper-organic complexes in organic solvents a gas chromatography with mass spectrometry method using a thermal sample probe is developed and shown to be superior to solvent extraction. This method is incorporated into a new multi-analytical protocol for the analysis of copper corrosion comprised of Fourier-Transform infrared (FTIR) for identification of chemical functions, powder X-ray diffraction (XRD) for identification of mineral phases and identification of organic molecules that also includes IC-MS and proteomics. Validation of the multi-analytical protocol with archaeological copper corrosion enables the recovery of a range of biomarkers including those for substances used in the past, for past environments and associated with changes in the deposition environment.