Development of a multi-analytical approach to investigate the fading of eosin in painting matrices

Sabatini, Francesca; Giugliano, Roberta; Degano, Ilaria; Lluveras‐Tenorio, Anna; Sokolová, Romana; Thoury, Mathieu; Colombini, Maria Perla

doi:10.1088/1757-899x/364/1/012066

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…Presumably related to the interaction of DMSO with the dyes, methylation of the carboxylic acid was also found, indicated with the notation "M1" (Fig. 6B) [25]. MS/MS data are provided in Supplementary Material section S-8.…”

Section: Degradation Analysis Of Eosinmentioning

confidence: 98%

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Mapping degradation pathways of natural and synthetic dyes with LC-MS: Influence of solvent on degradation mechanisms

Pirok

Moro

Meekel

et al. 2019

Journal of Cultural Heritage

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To help conserve the vast array of (combinations of) dyestuffs and pigments encountered in culturalheritage objects and application materials, a rapid and convenient method for dye-degradation research is required. In-solution degradation studies of dyes in a strong solvent, such as the commonly used dimethyl sulfoxide (DMSO), are potentially of interest, in addition to studies involving other solvents, such as water. The degradation of eosin and carminic acid under the influence of light was investigated in two solvents, i.e. in a mixture of DMSO and acetonitrile and in pure water. A liquid chromatography -mass spectrometry (LC-MS) method was developed for analysis of the degraded samples and identification of the individual components. The presence of DMSO generally facilitated faster degradation, which, in combination with its universal solvating properties are advantageous. However, different products were formed in the presence of DMSO. Degradation pathways for eosin and carminic acid in these solvents are proposed.

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Section: Degradation Analysis Of Eosinmentioning

confidence: 98%

“…6A,5). The loss of bromine under the influence of light has been well documented [13,23,24] and a clarification of the mechanism is provided in Supplementary Material section S-5. In addition, the MS/MS spectra of all degradation products of the bromine-loss pathway are provided in Supplementary Material section S-7.…”

Section: Degradation Analysis Of Eosinmentioning

confidence: 99%

Mapping degradation pathways of natural and synthetic dyes with LC-MS: Influence of solvent on degradation mechanisms

Pirok

Moro

Meekel

et al. 2019

Journal of Cultural Heritage

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“…In this field, the studies investigating eosin are mainly focused on its detection in Van Gogh's artworks by the use of non‐invasive approaches [31–35], while only few papers have been published on eosin identification in reference painting or textiles by chromatography techniques (HPLC–DAD [25,31,36–38] and HPLC–HRMS [38]) or ambient ionization mass spectrometry [39] and rarely historical samples containing eosin were analyzed, and no chromatogram was shown [31,40]. None of these studies was focused on the optimization of the method or the characterization of the precise composition of the standard and reference materials.…”

Section: Introductionmentioning

confidence: 99%

Development of a method based on high‐performance liquid chromatography coupled with diode array, fluorescence, and mass spectrometric detectors for the analysis of eosin at trace levels

Sabatini

Degano

Colombini

2020

Separation Science Plus

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Eosin (Acid Red 87, C.I. 45380) is one of the most brilliant and challenging early synthetic dyes. In this study, an analytical approach based on high‐performance liquid chromatography coupled with diode array and fluorescence detector and high resolution mass spectrometry was developed for testing different analytical columns and acids in the mobile phase. The ultra‐sensitive approach, based on a chromatographic separation on a solid core and a porous shell Poroshell 120 EC‐C18, allowed us to detect and characterize eosin and its synthesis by‐products, such as the debrominated and methyl ester forms of eosin, in trace levels (the limit of detection for eosin is 0.13 ppb). The resulting miscellaneous composition of the eosin standard highlights the importance to determine the exact composition of the starting material to deal with, in order to avoid misinterpretations in aged or degraded samples. Finally, the successful identification of eosin in few grains (approximatively 20 × 40 μm wide) of a faded Van Gogh's painting proved the strengths of our approach.

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Comparing different light-degradation approaches for the degradation of crystal violet and eosin Y

et al. 2022

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Development of a multi-analytical approach to investigate the fading of eosin in painting matrices

Cited by 4 publications

References 5 publications

Mapping degradation pathways of natural and synthetic dyes with LC-MS: Influence of solvent on degradation mechanisms

Mapping degradation pathways of natural and synthetic dyes with LC-MS: Influence of solvent on degradation mechanisms

Development of a method based on high‐performance liquid chromatography coupled with diode array, fluorescence, and mass spectrometric detectors for the analysis of eosin at trace levels

Comparing different light-degradation approaches for the degradation of crystal violet and eosin Y

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