L Maestro-Guijarro, A Pinilla, P M Carmona-Quiroga, F Agua, M Castillejo, M García-Heras, M Oujja, M A Villegas
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引用次数: 0
Abstract
Analysis of glass-based artworks is important for authentication purposes. In recent years, there have been rapid advancements and improvements in the characterization of glass objects using different analytical approaches. The present study presents an interdisciplinary and multi-analytical authentication approach that provides useful tools and markers to unmask possible imitations, counterfeiting, and forgeries in Cultural Heritage glass beads by comparing the composition of historical and modern glass beads. The approach includes the use of binocular magnifying glass, X-ray Fluorescence (XRF), Field Emission Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (FESEM-EDS), UV-Vis spectrophotometry, X-ray diffraction (XRD) and Laser Induced Breakdown Spectroscopy (LIBS) techniques. Resulting data indicate that antimony, when detected, is only present in historical beads, while boron, zinc, and/or molybdenum are only detected as possible components in modern beads. As marker chromophores for historical beads, lead antimoniate or iron are responsible for yellow, copper for red, and iron and/or copper for green colors. Modern beads coloration was attributed to the presence of cadmium sulfoselenide microparticles for yellow to red colors and chromium for green colors. Opacity in historical beads was generated by dispersed tin oxide or calcium antimoniate microcrystals, while in modern beads the opacity is related to ZrO2 microcrystals and/or fluorine ions. In this study, LIBS has been validated and proven feasible for in situ exploring analytical parameters that can be useful for authentication purposes of historical glass objects, regardless of their size, provenance, and chronology.
期刊介绍：
Talanta provides a forum for the publication of original research papers, short communications, and critical reviews in all branches of pure and applied analytical chemistry. Papers are evaluated based on established guidelines, including the fundamental nature of the study, scientific novelty, substantial improvement or advantage over existing technology or methods, and demonstrated analytical applicability. Original research papers on fundamental studies, and on novel sensor and instrumentation developments, are encouraged. Novel or improved applications in areas such as clinical and biological chemistry, environmental analysis, geochemistry, materials science and engineering, and analytical platforms for omics development are welcome.
Analytical performance of methods should be determined, including interference and matrix effects, and methods should be validated by comparison with a standard method, or analysis of a certified reference material. Simple spiking recoveries may not be sufficient. The developed method should especially comprise information on selectivity, sensitivity, detection limits, accuracy, and reliability. However, applying official validation or robustness studies to a routine method or technique does not necessarily constitute novelty. Proper statistical treatment of the data should be provided. Relevant literature should be cited, including related publications by the authors, and authors should discuss how their proposed methodology compares with previously reported methods.
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