Simultaneous identification of historical pigments Prussian blue and indigo in paintings by electrospray mass spectrometry
Language English Country England, Great Britain Media print
Document type Historical Article, Journal Article, Research Support, Non-U.S. Gov't
PubMed
23893639
DOI
10.1002/jms.3228
Knihovny.cz E-resources
- Keywords
- Prussian blue, electrospray, historical painting, indigo, mass spectrometry,
- MeSH
- Coloring Agents analysis chemistry MeSH
- History, 20th Century MeSH
- Ferrocyanides analysis chemistry MeSH
- Spectrometry, Mass, Electrospray Ionization methods MeSH
- Indigo Carmine analysis chemistry MeSH
- Paintings history MeSH
- Paint analysis MeSH
- Check Tag
- History, 20th Century MeSH
- Publication type
- Journal Article MeSH
- Historical Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Geographicals
- Czech Republic MeSH
- Names of Substances
- Coloring Agents MeSH
- ferric ferrocyanide MeSH Browser
- Ferrocyanides MeSH
- Indigo Carmine MeSH
A new analytical protocol for identification of Prussian blue (PB) and indigo was proposed. Pigments useful for dating of artworks were detected by flow injection analysis/electrospray ionization mass spectrometry after alkalization of their suspensions in water, decomposition of PB to iron (III) hydroxide and hexacyanoferrate (II) and reduction of indigo to soluble leucoindigo using sodium dithionite. Limits of detection (PB 47 pg, indigo 59 pg) complied with requirements for analysis of microsamples of historical paintings. Potential of the developed method was proven in analysis of blue samples of two oil paintings from the 20(th) century. Further, PB was confirmed in a microsample from a painting of 'Crucifixion', St. Sebestian church on St. Hill in Mikulov, Czech Republic.
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