Applications of synchrotron-based micro-imaging techniques to the chemical analysis of ancient paintings

Cotte, Marine; Susini, J.; Solé, V. A.; Taniguchi, Yoko; Chillida, Javier; Checroun, Emilie; Walter, Philippe

doi:10.1039/b801358f

Cited by 120 publications

(135 citation statements)

References 16 publications

Supporting

Mentioning

131

Contrasting

Unclassified

Order By: Relevance

“…Synergy with photodegradation and oxidation [64,66] Involved in discolouration and sulphation [106,197,199,202,203,[207][208][209] Unstable [103,123,200], but still used in wall paintings [73,193,[201][202][203] Red Red lead…”

Section: Hgsmentioning

confidence: 99%

“…It was already known to Romans [195,196] that mercury sulphide darkens when exposed to light, although not systematically [1,193,194,[197][198][199]. Moreover, HgS was not recommended for use in fresco, as humidity and pH affect its stability [103,123,200], but still it was used on wall paintings [73,193,[201][202][203]. Paint layers of pure vermillion are very vulnerable [199], while no darkening is observed when it is mixed with leadwhite [19,20,193,204].…”

Section: Mercury (Z = 80) Vermillion (Hgs Red)mentioning

confidence: 99%

“…Finally, the photodegradation of vermillion was explained in terms of formation of metallic mercury and HgCl 2 , due to the halogen impurities present in the pigment, identified thanks to secondary ion mass spectrometry (SIMS) analysis [207], and to X-ray spectroscopic analysis [208]. The role of Cl-ions, present as an impurity in the pigment, coming from marine aerosol, from the used binder or from pollution, in the degradation of vermillion has been ascertained thanks to the identification of chlorine species [197,199,202,203,[207][208][209]. Calomel (HgCl) 2 was identified by portable and micro-Raman spectroscopy, while HgCl 2 and metacinnabar were not [33,59,73,199].…”

Section: +mentioning

confidence: 99%

See 2 more Smart Citations

On the stability of mediaeval inorganic pigments: a literature review of the effect of climate, material selection, biological activity, analysis and conservation treatments

2017

View full text Add to dashboard Cite

This review is to be considered part of the development of the MEMORI dosimeter, to evaluate the impact of climate (relative humidity, temperature, illumination, etc., including volatile organic compounds) on moveable objects. In the framework of the MEMORI project, Ghent University was given the task to assess pigment degradation upon acetic acid exposure, and to collect information on pigments' stability. Moreover, to obtain a wider knowledge on the stability of common pigments, the effect of a variety of parameters was reviewed from literature. Discolouration and degradation of pigments significantly alter the legibility of polychrome works of art, so that the development of monitoring methods to ensure the preservation of cultural heritage objects is of primary importance.

show abstract

Section: Hgsmentioning

confidence: 99%

Section: Mercury (Z = 80) Vermillion (Hgs Red)mentioning

confidence: 99%

Section: +mentioning

confidence: 99%

See 1 more Smart Citation

On the stability of mediaeval inorganic pigments: a literature review of the effect of climate, material selection, biological activity, analysis and conservation treatments

2017

View full text Add to dashboard Cite

show abstract

“…Scholars have posited two possible pathways by which chlorine might provoke a light--induced alteration. In the first, chlorine reacts with cinnabar to form various light--sensitive mercury--chloride and mercury--sulfochloride compounds (Spring and Grout 2002, Cotte et al 2006, Cotte et al 2008, Cotte et al 2010and Radepont et al 2011. Analysis of blackened cinnabar on cultural heritage materials has identified the presence of calomel (Hg 2 Cl 2 ), mercuric chloride (HgCl 2 ) as well as Hg 3 S 2 Cl 2 polymorphs including corderoite (α--Hg 3 S 2 Cl 2 ), β--Hg 3 S 2 Cl 2 and kenhsuite (γ--Hg 3 S 2 Cl 2 ) ( Table 1).…”

Section: Chapter 2: Literature Reviewmentioning

confidence: 99%

Cinnabar alteration in archaeological wall paintings: an experimental and theoretical approach

2015

View full text Add to dashboard Cite

“…Other researchers have demonstrated the utility of this experimental procedure for collecting transmission-based microspectroscopic FTIR images of complex multilayered samples. 17,18 Examples include paint samples, which are similar to skin in the sense that paint samples consist of micrometric layers of organic and inorganic components, including proteinaceous compounds, fats, and resins. Although pressing layered paint samples between diamond windows has been shown to distort the geometry of layers somewhat, this procedure keeps the sample structure intact and free of contaminants.…”

Section: In Vitro Skin Spectramentioning

confidence: 99%

Impact of Tissue Heterogeneity on Noninvasive Near-Infrared Glucose Measurements in Interstitial Fluid of Rat Skin

Alexeeva

Arnold

2010

J Diabetes Sci Technol

View full text Add to dashboard Cite

Background: Movement of the optical interface used to collect noninvasive near-infrared spectra is known to dramatically increase prediction errors for glucose concentration measurements within the interstitial fluid of living rat skin. Prediction errors increase by more than 2.5-fold when the interface is moved before each noninvasive measurement compared to measurements where the interface position is constant throughout. Chemical heterogeneity of the skin matrix is examined as a possible mechanism for the strong sensitivity to the interface placement during noninvasive measurements conducted from transmission near-infrared absorption spectroscopy. Method: Microspectroscopy was performed over a region of the near-infrared spectrum (4000–5000 cm1) to map the concentrations of water, collagen protein, fat, and keratin protein within the skin tissue matrix through which noninvasive spectra are collected. Maps were created for multiple samples of skin excised from male and female animals. Sets of near-infrared spectra were constructed to simulate noninvasive spectra in accord with the basic tissue composition found from the microspectroscopic maps with added information corresponding to a span of glucose concentrations ranging from 5 to 35 mM and Gaussian-distributed noise. Results: Microspectroscopic maps of rat skin reveal similar patterns of heterogeneity for major chemical components of skin samples excised from both male and female animals. These maps demonstrate concentration domains with dimensions similar to the size of the fiber interface used to collect noninvasive spectra. Partial least squares calibration models generated from sets of simulated spectra demonstrate increases in prediction errors for glucose when the spectral matrix is changed in accord with the degree of chemical heterogeneity displayed in the skin maps. Prediction errors typically increase between 100 and 1000% when comparing errors generated from spectra that represent a single tissue composition versus spectra that represent a varied skin composition in accord with the distribution displayed in the skin maps. Conclusions: The distribution of the major components of skin is not uniform, but establishes domains within the skin matrix that strongly impact prediction errors for the noninvasive spectroscopic measurement of glucose within the interstitial fluid of rat dermis tissue. The observed increase in prediction error (>2.5-fold) determined from actual noninvasive measurements is within the lower range of prediction error increases demonstrated by this simulation study. These findings implicate that chemical heterogeneity within the tissue matrix is a major factor in the sensitivity of the location of the fiber interface used to collect noninvasive spectral data.

show abstract

Applications of synchrotron-based micro-imaging techniques to the chemical analysis of ancient paintings

Cited by 120 publications

References 16 publications

On the stability of mediaeval inorganic pigments: a literature review of the effect of climate, material selection, biological activity, analysis and conservation treatments

On the stability of mediaeval inorganic pigments: a literature review of the effect of climate, material selection, biological activity, analysis and conservation treatments

Cinnabar alteration in archaeological wall paintings: an experimental and theoretical approach

Impact of Tissue Heterogeneity on Noninvasive Near-Infrared Glucose Measurements in Interstitial Fluid of Rat Skin

Contact Info

Product

Resources

About