Diffuse reflectance FTIR database for the interpretation of the spectra obtained with a handheld device on built heritage materials

Arrizabalaga, Iker; Gómez-Laserna, Olivia; Carrero, Jose Antonio; Bustamante, Julen; Rodríguez, Azibar; Arana, Gorka; Madariaga, Juan Manuel

doi:10.1039/c4ay02189d

Cited by 40 publications

(24 citation statements)

References 27 publications

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“…In these cases, the use of Fourier Transform Infrared Spectroscopy (FTIR) is more indicated, since it avoids any problem related to the auto-fluorescence of the sample. Moreover, working with powdered samples, FTIR systems also ensure a better accuracy and repeatability of the results over the sample heterogeneities by sampling the whole corrosion system [23].…”

Section: Introductionmentioning

confidence: 99%

FTIR spectroscopic semi-quantification of iron phases: A new method to evaluate the protection ability index (PAI) of archaeological artefacts corrosion systems

et al. 2018

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This study proposes an innovative approach to semi-quantify the main iron corrosion phases found in corrosion systems of archaeological artefacts. This method is based on the treatment of Fourier Transform Infrared Spectroscopy (FTIR) data using a homemade spectra decomposition software (PALME). Its application was first tested on mixtures of pure iron corrosion standards. After optimization, it was used to study real archaeological samples and evaluate the stability of their corrosion system. Considering that reliable and repetitive results were reached using extremely small quantities of material, this method can be particularly suitable for the study of iron-based objects of cultural interest.

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Section: Introductionmentioning

confidence: 99%

FTIR spectroscopic semi-quantification of iron phases: A new method to evaluate the protection ability index (PAI) of archaeological artefacts corrosion systems

et al. 2018

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“…The spectrum relative to the white area (Figure 8c) clearly shows the features of calcite: 4270 cm -1 (3ν 3 (CO 3 ) 2-), 2515+2590 cm -1 doublet (ν 1 + ν 3 and/or 2ν 2 + ν 4 (CO 3 ) 2-), 1795 cm -1 (ν 1 + ν 4 (CO 3 ) 2-), 1400 cm -1 ca. strong absorption (ν 3 (CO 3 ) 2-) inverted by the reststrahlen effect, 880 cm -1 (ν 2 ) distorted in a derivative shape (48)(49)(50). The same features are more or less evident in the other DRIFT spectra, especially in that of the black spot (Figure 8a), and are highlighted with a dotted red line.…”

Section: Molecular Spectroscopy -Diffuse Reflectance Infrared Fouriermentioning

confidence: 68%

Integrated analytical approach to unveil the secrets of the recently discovered “Sphinx Room”: a new piece of Domus Aurea puzzle.

Caggiani

Coccato

Mazzoleni

et al. 2020

Preprint

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The recent discovery of the Sphinx Room, belonging to the Domus Aurea Esquiline wing, thanks to the framework given by the project “Non-destructive analytical studies at Parco Archeologico del Colosseo (Rome, Italy)”, allowed to perform an analytical campaign, both in situ and on micro-fragments. The first aim was the archaeometrical characterisation of the painting materials. In fact, the analytical information on the wall decorations contributes to the overall comprehension of this extraordinary imperial architecture, and allows to contextualize the newly-discovered room inside the Domus Aurea complex. Moreover, further knowledge on the painting technique is achieved, which is of relevance for the general understanding of Roman mural decorations. The palette, composed of Egyptian blue, green earths, iron- and lead-based red, orange and yellow, calcite, carbon black, allowed to compare the Sphinx Room to Corridor 92 and Room 114 of Domus Aurea and to other sites in Rome. Furthermore, the employ of an organic binder in some spots can be put forward based on spectroscopic results, which does not exclude a wider use of the a fresco. Furthermore, a complementary methodological strategy was designed, in order to achieve a complete characterization of the materials. In addition to the well-known combination of in situ Raman and X-ray fluorescence analyses, Infrared Fourier Transform Spectroscopy was used, both in situ (Diffuse Reflectance) and in the lab (Attenuated Total Reflectance). The results confirm the suitability of this approach for the characterization of Roman wall paintings, where both inorganic and organic materials are simultaneously present.

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“…The combination bands (sum or difference of fundamental bands) are enhanced in reflection spectra. It has been shown that the ν1 + ν4 and ν1 + ν3 bands can be used to identify carbonates and for calcite the bands occur at 1800 cm − 1 and 2512 cm − 1 , respectively ( Arrizabalaga et al, 2015 ;Miliani et al, 2012). It is clear in Fig.…”

Section: Figmentioning

confidence: 81%

“…This is because FTIR reflectance results in a combination of reflection and transmission/absorbance FTIR spectra, which is not always as easy to interpret. However, the increasing availability of portable spectrometers, and the possibility to use reflectance FTIR spectroscopy as non-invasive tool in heritage studies, have resulted in a number of in situ FT-IR reflectance studies on heritage building material, pigments in wall paintings and synthetic alteration of artefacts (Arrizabalaga et al, 2015;Miliani et al, 2012 ;Conti et al, 2013). As far as we can ascertain, this is the first reported use of a portable reflectance FTIR instrument used for the analyses of rock art.…”

Section: Ft-ir Spectroscopymentioning

confidence: 99%

Characterising pigments on 30 000-year-old portable art from Apollo 11 Cave, Karas Region, southern Namibia

Rifkin

Prinsloo

Dayet³

et al. 2016

Journal of Archaeological Science: Reports

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As an unambiguous indication of complex cognitive capacity, representational art presents explicit evidence for modern and symbolic human behaviour. The only examples of African figurative art dating to the Late Pleistocene comprise seven stone plaques recovered from Apollo 11 Cave in the Huns Mountains, southern Namibia. The plaques derive from a single anthropogenic layer dated by radiocarbon ( 14 C) accelerator mass spectrometry (AMS) and optically simulated luminescence (OSL) methods to c. 30 000 years ago. We present the results of digital (CIE) L*a*b* colourimetric and portable energy dispersive X-ray fluorescence (ED-XRF), Raman spectroscopic and Fourier transform infrared reflectance (FT-IR) analyses of the pigments present on the plaques. These results provide the earliest direct evidence, in Africa, for the preparation of pigment-based paint-like mixtures and their application to create prehistoric art. Our research shows that in the creation of the depictions on the plaques, the artists used black pigments derived from manganese and charcoal, red pigments likely derived from ocherous shale and white pigments possibly derived from ostrich eggshell. Additionally, these plaques provide unique evidence for the combined use of mineral-and carbon-based pigment 'crayons' during the African Middle Stone Age.

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Diffuse reflectance FTIR database for the interpretation of the spectra obtained with a handheld device on built heritage materials

Abstract: FTIR handheld devices, working in the Diffuse Reflectance mode (DRIFT), are promising analytical instruments to perform in situ analyses on cultural heritage materials.

Cited by 40 publications

References 27 publications

FTIR spectroscopic semi-quantification of iron phases: A new method to evaluate the protection ability index (PAI) of archaeological artefacts corrosion systems

FTIR spectroscopic semi-quantification of iron phases: A new method to evaluate the protection ability index (PAI) of archaeological artefacts corrosion systems

Integrated analytical approach to unveil the secrets of the recently discovered “Sphinx Room”: a new piece of Domus Aurea puzzle.

Characterising pigments on 30 000-year-old portable art from Apollo 11 Cave, Karas Region, southern Namibia

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