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Comparison of analytical tools appropriate for identification of proteinaceous additives in historical mortars

I. Krizova, J. Schultz, I. Nemec, R. Cabala, R. Hynek, S. Kuckova,

. 2018 ; 410 (1) : 189-200. [pub] 20171116

Language English Country Germany

Document type Comparative Study, Historical Article, Journal Article

E-resources Online Full text

NLK ProQuest Central from 2011-01-01 to 1 year ago
Medline Complete (EBSCOhost) from 2003-01-01 to 1 year ago
Health & Medicine (ProQuest) from 2011-01-01 to 1 year ago

Natural organic additives such as eggs, lard, resins, and oils have been added to mortars since ancient times, because the ancient builders knew of their positive effect on the mortar quality. The tradition of adding organic materials to mortars was commonly handed down only verbally for thousands years. However, this practice disappeared in the nineteenth century, when the usage of modern materials started. Today, one of the most recent topics in the industry of building materials is the reusing of natural organic materials and searching for the forgotten ancient recipes. The research of the old technological approaches involves currently the most advanced analytical techniques and methods. This paper is focussed on testing the possibility of identification of proteinaceous additives in historical mortars and model mortar samples containing blood, bone glue, curd, eggs and gelatine, by Fourier transform infrared (FTIR) and Raman spectroscopy, gas chromatography - mass spectrometry (GC-MS), matrix-assisted laser desorption/ionisation-time of flight mass spectrometry (MALDI-TOF MS), liquid chromatography-electrospray ionisation-quadrupole-time of flight mass spectrometry (LC-ESI-Q-TOF MS) and enzyme-linked immunosorbent assay (ELISA). All these methods were applied to the mortar sample taken from the interior of the medieval (sixteenth century) castle in Namest nad Oslavou in the Czech Republic and their comparison contributed to the rough estimation of the protein additive content in the mortar. The obtained results demonstrate that only LC-ESI-Q-TOF MS, MALDI-TOF MS and ELISA have the sufficiently low detection limits that enable the reliable identification of collagens in historical mortars. Graphical abstract Proteomics analyses of historical mortars.

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$a Natural organic additives such as eggs, lard, resins, and oils have been added to mortars since ancient times, because the ancient builders knew of their positive effect on the mortar quality. The tradition of adding organic materials to mortars was commonly handed down only verbally for thousands years. However, this practice disappeared in the nineteenth century, when the usage of modern materials started. Today, one of the most recent topics in the industry of building materials is the reusing of natural organic materials and searching for the forgotten ancient recipes. The research of the old technological approaches involves currently the most advanced analytical techniques and methods. This paper is focussed on testing the possibility of identification of proteinaceous additives in historical mortars and model mortar samples containing blood, bone glue, curd, eggs and gelatine, by Fourier transform infrared (FTIR) and Raman spectroscopy, gas chromatography - mass spectrometry (GC-MS), matrix-assisted laser desorption/ionisation-time of flight mass spectrometry (MALDI-TOF MS), liquid chromatography-electrospray ionisation-quadrupole-time of flight mass spectrometry (LC-ESI-Q-TOF MS) and enzyme-linked immunosorbent assay (ELISA). All these methods were applied to the mortar sample taken from the interior of the medieval (sixteenth century) castle in Namest nad Oslavou in the Czech Republic and their comparison contributed to the rough estimation of the protein additive content in the mortar. The obtained results demonstrate that only LC-ESI-Q-TOF MS, MALDI-TOF MS and ELISA have the sufficiently low detection limits that enable the reliable identification of collagens in historical mortars. Graphical abstract Proteomics analyses of historical mortars.
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$a Schultz, Julia $u Laboratory of Archaeometry and Conservation Sciences, Institute for Technology of Painting, State Academy of Art and Design Stuttgart, Am Weissenhof 1, 70191, Stuttgart, Germany.
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$a Nemec, Ivan $u Faculty of Science, Department of Inorganic Chemistry, Charles University in Prague, Hlavova 8, 128 43, Prague, Czech Republic.
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$a Cabala, Radomir $u Faculty of Science, Department of Analytical Chemistry, Charles University in Prague, Hlavova 8, 128 43, Prague, Czech Republic.
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$a Hynek, Radovan $u Department of Biochemistry and Microbiology, University of Chemistry and Technology in Prague, Technická 5, 166 28, Prague, Czech Republic.
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$a Kuckova, Stepanka $u Department of Biochemistry and Microbiology, University of Chemistry and Technology in Prague, Technická 5, 166 28, Prague, Czech Republic. kuckovas@vscht.cz.
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