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Characterization of the Chloroform-Based Pretreatment Method for 14C Dating of Restored Wooden Samples

  • Lucia Liccioli (a1) (a2), Mariaelena Fedi (a1), Luca Carraresi (a1) (a3) and Pier Andrea Mandò (a1) (a3)
Abstract
Abstract

At INFN-LABEC (Florence, Italy), a new pretreatment for radiocarbon dating based on chloroform has been recently set up. This method aims to remove the synthetic resins used for artwork restoration, which otherwise could alter the original 14C content. The present study characterizes the efficiency of the process when applied to wood. We have verified whether the effectiveness of the pretreatment depends on the number of extractions in chloroform. We prepared samples by applying different volumes of Paraloid B-72®, one of the most widespread products used in restoration, on poplar wood of known age. Contaminated samples were artificially aged in a climatic chamber. A fraction from each sample was collected before any treatment and after respectively 1, 2, 3, and 4 extractions in chloroform, and 14C dating by AMS, the resin appears to be already removed after the first two extractions. Furthermore, the extracted mixtures of chloroform and possible removed Paraloid were measured by FTIR spectroscopy, the results of which confirmed the 14C results. The efficiency of the pretreatment was also verified on historical wooden materials that had been previously restored. In these cases, a higher number of extractions is required, suggesting a careful approach when dealing with “real” artworks.

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*Corresponding author. Email: liccioli@fi.infn.it.
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Selected Papers from the 2015 Radiocarbon Conference, Dakar, Senegal, 16–20 November 2015

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This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

F Cappitelli , E Zanardini , C Sorlini . 2004. The biodeterioration of synthetic resins used in conservation. Macromolecular Bioscience 4:399406.

ME Fedi , A Cartocci , M Manetti , F Taccetti , PA Mandò . 2007. The 14C AMS facility at LABEC, Florence. Nuclear Instruments and Methods in Physics Research B 259(1):1822.

M Traoré , J Kaalb , A Martínez Cortizas . 2016. Application of FTIR spectroscopy to the characterization of archaeological wood. Spectrochimica Acta A: Molecular and Biomolecular Spectroscopy 153(1):6370.

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Radiocarbon
  • ISSN: 0033-8222
  • EISSN: 1945-5755
  • URL: /core/journals/radiocarbon
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