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Lignin Quantification of Papyri by TGA—Not a Good Idea

Papyri belong to the oldest writing grounds in history. Their conservation is of the highest importance in preserving our cultural heritage, which is best achieved based on an extensive knowledge of the materials’ constituents to choose a tailored conservation approach. Thermogravimetric Analysis (T...

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Autores principales: Bausch, Florian, Owusu, Dickson D., Jusner, Paul, Rosado, Mario J., Rencoret, Jorge, Rosner, Sabine, del Río, José C., Rosenau, Thomas, Potthast, Antje
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8305842/
https://www.ncbi.nlm.nih.gov/pubmed/34299657
http://dx.doi.org/10.3390/molecules26144384
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author Bausch, Florian
Owusu, Dickson D.
Jusner, Paul
Rosado, Mario J.
Rencoret, Jorge
Rosner, Sabine
del Río, José C.
Rosenau, Thomas
Potthast, Antje
author_facet Bausch, Florian
Owusu, Dickson D.
Jusner, Paul
Rosado, Mario J.
Rencoret, Jorge
Rosner, Sabine
del Río, José C.
Rosenau, Thomas
Potthast, Antje
author_sort Bausch, Florian
collection PubMed
description Papyri belong to the oldest writing grounds in history. Their conservation is of the highest importance in preserving our cultural heritage, which is best achieved based on an extensive knowledge of the materials’ constituents to choose a tailored conservation approach. Thermogravimetric Analysis (TGA) has been widely employed to quantify cellulose and lignin in papyrus sheets, yielding reported lignin contents of 25% to 40%. In this work, the TGA method conventionally used for papyrus samples was repeated and compared to other lignin determination approaches (Klason-lignin and acetyl bromide-soluble lignin). TGA can lead to a large overestimation of the lignin content of commercial papyrus sheets (~27%) compared to the other methods (~5%). A similar overestimation of the lignin content was found for the pith and rind of the native papyrus plant. We concluded that the TGA method should, therefore, not be used for lignin quantification.
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spelling pubmed-83058422021-07-25 Lignin Quantification of Papyri by TGA—Not a Good Idea Bausch, Florian Owusu, Dickson D. Jusner, Paul Rosado, Mario J. Rencoret, Jorge Rosner, Sabine del Río, José C. Rosenau, Thomas Potthast, Antje Molecules Article Papyri belong to the oldest writing grounds in history. Their conservation is of the highest importance in preserving our cultural heritage, which is best achieved based on an extensive knowledge of the materials’ constituents to choose a tailored conservation approach. Thermogravimetric Analysis (TGA) has been widely employed to quantify cellulose and lignin in papyrus sheets, yielding reported lignin contents of 25% to 40%. In this work, the TGA method conventionally used for papyrus samples was repeated and compared to other lignin determination approaches (Klason-lignin and acetyl bromide-soluble lignin). TGA can lead to a large overestimation of the lignin content of commercial papyrus sheets (~27%) compared to the other methods (~5%). A similar overestimation of the lignin content was found for the pith and rind of the native papyrus plant. We concluded that the TGA method should, therefore, not be used for lignin quantification. MDPI 2021-07-20 /pmc/articles/PMC8305842/ /pubmed/34299657 http://dx.doi.org/10.3390/molecules26144384 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Bausch, Florian
Owusu, Dickson D.
Jusner, Paul
Rosado, Mario J.
Rencoret, Jorge
Rosner, Sabine
del Río, José C.
Rosenau, Thomas
Potthast, Antje
Lignin Quantification of Papyri by TGA—Not a Good Idea
title Lignin Quantification of Papyri by TGA—Not a Good Idea
title_full Lignin Quantification of Papyri by TGA—Not a Good Idea
title_fullStr Lignin Quantification of Papyri by TGA—Not a Good Idea
title_full_unstemmed Lignin Quantification of Papyri by TGA—Not a Good Idea
title_short Lignin Quantification of Papyri by TGA—Not a Good Idea
title_sort lignin quantification of papyri by tga—not a good idea
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8305842/
https://www.ncbi.nlm.nih.gov/pubmed/34299657
http://dx.doi.org/10.3390/molecules26144384
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