L'analyse des alliages anciens à base de cuivre : état des connaissances et développement d'un protocole d'analyse par ICP-AES.

Abstract

Atomic emission spectrometry is a particularly suitable tool for ancient artefacts analysis such as copper based alloys : with few sample (10 mg) a large spectrum of chemical elements can be analysed on a wide range of concentrations (from ppm up to decades of %). The Centre de recherche et de restauration des musées de France replaced its Direct Current Plasma spectrometer in 1997 by an Inductively Coupled one. This led us to review the literature dealing with protohistoric copper based alloys elemental analysis, showing the reasons why the provenancing studies decayed during the 70's. The trace element analysis is now restricted in building compositional groups, whereas we think such datas can lead to much more information. In order to develop this idea and to take advantage of the new technical capabilities, the analytical procedure was totally renewed leading to sensitivity and accuracy enhancements, besides the addition of two newly measured chemical elements.

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