Journal ArticleDOI
Evaluation of data processing and analysis approaches for fresco pigment studies by portable X-ray fluorescence spectrometry and portable Raman spectroscopy
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TLDR
A portable X-ray fluorescence (XRF) spectrometer and portable Raman spectrophotometer were utilized at the Coriglia, Castel Viscardo excavation site near Orvieto, Italy to study pigments found on fresco as discussed by the authors.Abstract:
A portable X-ray fluorescence (XRF) spectrometer and portable Raman spectrophotometer were utilized at the Coriglia, Castel Viscardo excavation site near Orvieto, Italy to study pigments found on fresco. Over eighty fresco samples were analyzed. Identified pigments included vermillion, red ochre, yellow ochre, terre verte, Egyptian blue, and hematite. XRF spectroscopic data were collected utilizing three separate sets of instrument conditions. Various data processing and analysis approaches were evaluated for the XRF and Raman spectroscopic data including scatterplots and analysis of variance on integrated peak areas, live time correction of the XRF spectral intensities, principle components analysis on both the integrated peak areas and spectra, and data fusion of the spectra. Fusion of the high voltage and low voltage under vacuum XRF spectroscopic data provided improved data clustering results over single technique data. Fusion of high voltage XRF spectroscopic data with Raman data also was demonstrated to provide improved differentiation results for certain pigments. Data from individual pigments were then evaluated using these demonstrated best approaches for possible source variations with encouraging results.read more
Citations
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The on-site/remote Raman analysis with mobile instruments: a review of drawbacks and success in cultural heritage studies and other associated fields
TL;DR: The miniaturisation of laser sources, charge-coupled device electronic control boxes and increasing Lap-top computer capacity led to a revolution in Raman spectrometry: measurements can be made outside the laboratory with transportable, mobile and ultramobile instruments, even in severe conditions as discussed by the authors.
Journal ArticleDOI
Raman spectroscopy of minerals and mineral pigments in archaeometry
TL;DR: A detailed knowledge of the mineral phases is crucial to solve archaeological problems: Raman spectroscopy is a powerful investigation technique and has been applied extensively in the last 30 years on mineral identification and on pigment degradation as mentioned in this paper.
Journal ArticleDOI
Mobile Spectroscopic Instrumentation in Archaeometry Research.
TL;DR: This review includes over 160 references pertaining to the use of mobile spectroscopy for archaeometry and results of a literature survey on their applications for cultural heritage objects are presented.
Journal ArticleDOI
Raman spectroscopic library of medieval pigments collected with five different wavelengths for investigation of illuminated manuscripts
TL;DR: In this paper, reference spectra of 32 different compounds, mostly used in mediaeval manuscripts as pigments and inks, are recorded, and five different wavelengths were used as excitation sources.
Journal ArticleDOI
Multi-technique investigation of Roman decorated plasters from Villa dei Quintili (Rome, Italy)
Vincenza Crupi,G. Galli,Mauro Francesco La Russa,Francesca Longo,Giacomo Maisano,Domenico Majolino,Marco Malagodi,Antonino Pezzino,Michela Ricca,Barbara Rossi,Barbara Rossi,Silvestro Antonio Ruffolo,Valentina Venuti +12 more
TL;DR: In this article, a handheld X-ray fluorescence analyser and a portable Raman spectrometer were used to identify the painted surface of plasters from different areas of an important Roman monumental complex.
References
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Journal ArticleDOI
Raman spectroscopic library of natural and synthetic pigments (pre- ≈ 1850 AD)
TL;DR: The Raman spectra of over 60 pigments, both natural and synthetic, known to have been in use before ≈ 1850 AD, have been studied by Raman microscopy.
Journal ArticleDOI
Analysis of pigments from Roman wall paintings found in Vicenza.
TL;DR: The analysis of about 60 samples of wall paintings showed that the mortar preparation generally showed a porous layer, with crushed grains under the pigment layer, but in certain cases two superposed pigment layers were found: yellow superimposed on both red and pink, black on pink, green on black.
Journal ArticleDOI
Fusion of aroma, FT-IR and UV sensor data based on the Bayesian inference. Application to the discrimination of white grape varieties
TL;DR: Bayesian fusion proved to be very well suited to the combination of all kinds of analytical measurements or sensors, as long as they provide individual classification outputs, and is able to cope with sensors providing large, noisy and redundant data as well as sensors showing very dissimilar efficiency levels.
Journal ArticleDOI
Elemental analysis and characterization of ochre sources from Southern Arizona
Rachel S. Popelka-Filcoff,Elizabeth J. Miksa,J. David Robertson,Michael D. Glascock,Henry Wallace +4 more
TL;DR: In this paper, a collection of potential geologic sources of ochre in the Tucson basin of Arizona, sampling of those sources, instrumental neutron activation analysis (INAA), and subsequent multivariate analysis of the data are described.
Journal ArticleDOI
Chemometrical strategies for feature selection and data compression applied to NIR and MIR spectra of extra virgin olive oils for cultivar identification.
TL;DR: Chemometrical strategies applied to fused NIR and MIR spectra represent an effective method for classification of extra virgin olive oils on the basis of the olive cultivar.
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