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Analysis of natural organic dyes and pigments by mass spectrometry
Stýblová, Marie ; Hrdličková Kučková, Štěpánka (advisor) ; Čapek Adamec, Martin (referee)
This thesis named "Analysis of natural organic dyes and pigments by mass spectrometry" investigates the identification of selected natural organic dyes and pigments by qualitative Laser Desorption/Ionisation - Time of Flight Mass Spectrometry analysis (LDI-TOF MS). The advantage of LDI-TOF MS method is its quick and reliable identification of low molecular weight material without preparatory chemical or time-consuming modification of samples. This method can be used for the analysis of works of art or for verifying their authenticity thanks to requiring only a little amount of sample. The LDI-TOF MS was tested on 19 organic dyes and pigments (e.g. alizarin, apigenin, baicalein, flavone, xanthone, tannic acid), four exemplarily prepared lakes (alizarin, purpurin, chrysin a quercetin lakes) and lakes mixed with organic binding media. The method was also successfully applied to two samples of blue color that were taken from Josef Čapek's painting called 'Procházka' (The Walk), that was dating back to 1936.
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Analysis of natural organic dyes and pigments by mass spectrometry
Stýblová, Marie ; Hrdličková Kučková, Štěpánka (advisor) ; Čapek Adamec, Martin (referee)
This thesis named "Analysis of natural organic dyes and pigments by mass spectrometry" investigates the identification of selected natural organic dyes and pigments by qualitative Laser Desorption/Ionisation - Time of Flight Mass Spectrometry analysis (LDI-TOF MS). The advantage of LDI-TOF MS method is its quick and reliable identification of low molecular weight material without preparatory chemical or time-consuming modification of samples. This method can be used for the analysis of works of art or for verifying their authenticity thanks to requiring only a little amount of sample. The LDI-TOF MS was tested on 19 organic dyes and pigments (e.g. alizarin, apigenin, baicalein, flavone, xanthone, tannic acid), four exemplarily prepared lakes (alizarin, purpurin, chrysin a quercetin lakes) and lakes mixed with organic binding media. The method was also successfully applied to two samples of blue color that were taken from Josef Čapek's painting called 'Procházka' (The Walk), that was dating back to 1936.
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Golden shaffron paint
Stýblová, Marie ; Kodíček, Milan (referee) ; Hrdličková Kučková, Štěpánka (advisor)
The aim of this thesis was to prepare three golden saffron varnishes due to medieval recipes, to assess their quality and color intensity. The prepared golden varnishes also served as a model samples to study resineous substances using gas chromatography in another diploma thesis. This work also deals with the history of usage of saffron (Crocus sativus) in artworks, medicine and gastronomy. It deals with its origin, cultivation and the main coloring substances, which are contained in pistils and stigmas, as well as their chemical stucture and biosynthesis. In this paper is shown, that the saffron is a very interesting plant, which produces the unmistakable aroma and taste, currently used in various fields, and even industial production. However, the preparation of dyes for painting and restoration purposes, it is almost negligible compared to the past.
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