LEAD ISOTOPE ANALYSIS OF ARCHAEOLOGICAL METALS BY MULTIPLE-COLLECTOR INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY*

Authors: BAKER, J.; STOS, S.; WAIGHT, T.

Source: Archaeometry, Volume 48, Number 1, February 2006 , pp. 45-56(12)

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Abstract:

Lead isotope ratios in archaeological silver and copper were determined by MC–ICPMS using laser ablation and bulk dissolution without lead purification. Laser ablation results on high-lead metals and bulk solution analyses on all samples agree within error of TIMS data, suggesting that problems from isobaric interferences and/or mass bias variations due to the presence of matrix elements are insignificant. Inaccurate laser ablation analyses on low-lead copper reflect erroneous mass bias corrections from use of a non-matrix matched standard. However, in most cases, silver and copper are analysable for lead isotopes by bulk dissolution or laser ablation MC–ICPMS with simplified sample preparation.

Keywords: LEAD ISOTOPE ANALYSIS; SILVER; COPPER; MC–ICPMS; TIMS; LASER ABLATION

Document Type: Research article

DOI: http://dx.doi.org/10.1111/j.1475-4754.2006.00242.x

Publication date: 2006-02-01