Garcia Kimberly G, Massonnet Philippe, Nuffel Sebastiaan Van, Heeren Ron M A
Maastricht MultiModal Molecular Imaging (M4i) Institute, Maastricht University, Universiteitssingel 50, Maastricht 6229 ER, The Netherlands.
Anal Chem. 2025 Jan 21;97(2):1054-1058. doi: 10.1021/acs.analchem.4c05523. Epub 2025 Jan 6.
In the field of cultural heritage, and more specifically in oil paintings, the ability to unambiguously identify and locate metal soaps is of great interest for a better understanding of painting degradation. Here, we demonstrate the use of a Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS) instrument capable of tandem mass spectrometry imaging for the unambiguous identification and localization of lead soaps in cross sections of samples of old oil paintings at high spatial resolution. It is shown that the specific fragmentation pattern of lead soaps is dictated by the loss of the lead ion and that fragmentation occurs on the hydrocarbon chains of the fatty acids. This method offers new opportunities for a better understanding of the chemical changes in aging oil paint samples as well as investigation of organic pigments and binders.
在文化遗产领域，更具体地说是在油画领域，明确识别和定位金属皂的能力对于更好地理解绘画降解具有重要意义。在此，我们展示了一种飞行时间二次离子质谱仪（ToF-SIMS）的应用，该仪器能够进行串联质谱成像，以高空间分辨率在旧油画样品的横截面中明确识别和定位铅皂。结果表明，铅皂的特定碎片模式由铅离子的损失决定，且碎片形成于脂肪酸的碳氢链上。该方法为更好地理解老化油画样品中的化学变化以及研究有机颜料和粘合剂提供了新的机会。
