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Micro-invasive method for studying lead isotopes in paintings* |
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| Authors: | P. D'Imporzano K. Keune J. M. Koornneef E. Hermens P. Noble K. van Zuilen G. R. Davies |
| Affiliation: | 1. Faculty of Science, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands;2. Conservation & Science, Rijksmuseum Amsterdam, Amsterdam, the Netherlands Faculty of Science, University of Amsterdam, Amsterdam, the Netherlands;3. Faculty of Humanities, University of Amsterdam, Amsterdam, the Netherlands;4. Conservation & Science, Rijksmuseum Amsterdam, Amsterdam, the Netherlands |
| Abstract: | A micro-invasive technique is presented that enables pigment sampling from individual layers of a painting cross-section by obtaining a furrow 10–50 μm wide of chosen length. Combined with increased sensitivity of lead (Pb) isotope analysis using multicollector inductively coupled plasma mass spectrometry (MC-ICPMS) equipped with a 1013 Ω resistor or a Pb double-spike technique, the amount of Pb needed for isotopic analysis is drastically reduced, while maintaining a relative 2 SD precision for 206Pb/204Pb of < 0.02%. The methodology proved able to characterize Pb isotope differences within paint layers. |
| Keywords: | lead white pigment micro-invasive sampling lead isotopes MC-ICPMS 1013 Ω amplifier |