Microspectrofluorimetry and chemometrics for the identification of medieval lake pigments

Detalhes bibliográficos
Autor(a) principal: Nabais, Paula
Data de Publicação: 2018
Outros Autores: Melo, Maria J., Lopes, João A., Vitorino, Tatiana, Neves, Artur, Castro, Rita
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://doi.org/10.1186/s40494-018-0178-1
Resumo: These studies were supported by the Portuguese Science Foundation through three research projects and three Ph.D. Grants, including the three awarded to Rita Castro, Paula Nabais and Tatiana Vitorino (Ph.D. Grant Nos. SFRH/BD/76789/2011, CORES Ph.D. programme PD/BD/105895/2014 and PD/BD/105902/2014), and through the scientific infrastructures funded through RECI/QEQ-MED/0330/2012, REM2013 and the Associated Laboratory for Sustainable Chemistry-Clean Processes and Technologies-LAQV, which is financed by national funds from FCT/MEC (UID/QUI/50006/2015) and co-financed by the ERDF under the PT2020 Partnership Agreement (POCI-01-0145-FEDER-007265). Support was also given by the Calouste Gulbenkian Foundation award 'Estimulo a Investigacao 2016' (146301).
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spelling Microspectrofluorimetry and chemometrics for the identification of medieval lake pigmentsDyesHCALake pigmentsMedieval manuscriptsPCASIMCASpectrofluorimetryConservationArchaeologyArchaeologyThese studies were supported by the Portuguese Science Foundation through three research projects and three Ph.D. Grants, including the three awarded to Rita Castro, Paula Nabais and Tatiana Vitorino (Ph.D. Grant Nos. SFRH/BD/76789/2011, CORES Ph.D. programme PD/BD/105895/2014 and PD/BD/105902/2014), and through the scientific infrastructures funded through RECI/QEQ-MED/0330/2012, REM2013 and the Associated Laboratory for Sustainable Chemistry-Clean Processes and Technologies-LAQV, which is financed by national funds from FCT/MEC (UID/QUI/50006/2015) and co-financed by the ERDF under the PT2020 Partnership Agreement (POCI-01-0145-FEDER-007265). Support was also given by the Calouste Gulbenkian Foundation award 'Estimulo a Investigacao 2016' (146301).Microspectrofluorimetry offers high sensitivity, selectivity, fast data acquisition, good spatial resolution (down to 2 μm), and the possibility of in-depth profiling. It has proved to be a powerful analytical tool in identifying dyes and lake pigments in works of art. To maximize the extraction of the information present in fluorescence emission and excitation spectra, we propose a chemometric approach to discriminate dark reds to pink colours based on brazilwood, cochineal, kermes and lac dye. These range of hues was obtained using a diverse range of medieval recipes for brazilwood, kermes and lac colourants and Winsor and Newton archive for cochineal lake pigments; the lake pigments were analyzed as colour paints (arabic-gum and glair were the medieval binders selected). Unsupervised (HCA & PCA) and supervised (SIMCA) modelling were tested, allowing to explore similarities between colourants and classify the spectral data into the different lake pigments classes. It was possible to separate the four different chromophores based on their excitation spectra or bringing together the emission and excitation spectra. The first method could also differentiate between the cochineal lake pigments, in particular between crimson lakes with different aluminates and an extender (gypsum) and between carmines with different complexing ions (aluminum and calcium).LAQV@REQUIMTEDCR - Departamento de Conservação e RestauroRUNNabais, PaulaMelo, Maria J.Lopes, João A.Vitorino, TatianaNeves, ArturCastro, Rita2019-01-25T23:41:22Z2018-12-012018-12-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://doi.org/10.1186/s40494-018-0178-1eng2050-7445PURE: 5585835http://www.scopus.com/inward/record.url?scp=85043321115&partnerID=8YFLogxKhttps://doi.org/10.1186/s40494-018-0178-1info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T04:28:18Zoai:run.unl.pt:10362/58651Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:33:18.104514Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Microspectrofluorimetry and chemometrics for the identification of medieval lake pigments
title Microspectrofluorimetry and chemometrics for the identification of medieval lake pigments
spellingShingle Microspectrofluorimetry and chemometrics for the identification of medieval lake pigments
Nabais, Paula
Dyes
HCA
Lake pigments
Medieval manuscripts
PCA
SIMCA
Spectrofluorimetry
Conservation
Archaeology
Archaeology
title_short Microspectrofluorimetry and chemometrics for the identification of medieval lake pigments
title_full Microspectrofluorimetry and chemometrics for the identification of medieval lake pigments
title_fullStr Microspectrofluorimetry and chemometrics for the identification of medieval lake pigments
title_full_unstemmed Microspectrofluorimetry and chemometrics for the identification of medieval lake pigments
title_sort Microspectrofluorimetry and chemometrics for the identification of medieval lake pigments
author Nabais, Paula
author_facet Nabais, Paula
Melo, Maria J.
Lopes, João A.
Vitorino, Tatiana
Neves, Artur
Castro, Rita
author_role author
author2 Melo, Maria J.
Lopes, João A.
Vitorino, Tatiana
Neves, Artur
Castro, Rita
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv LAQV@REQUIMTE
DCR - Departamento de Conservação e Restauro
RUN
dc.contributor.author.fl_str_mv Nabais, Paula
Melo, Maria J.
Lopes, João A.
Vitorino, Tatiana
Neves, Artur
Castro, Rita
dc.subject.por.fl_str_mv Dyes
HCA
Lake pigments
Medieval manuscripts
PCA
SIMCA
Spectrofluorimetry
Conservation
Archaeology
Archaeology
topic Dyes
HCA
Lake pigments
Medieval manuscripts
PCA
SIMCA
Spectrofluorimetry
Conservation
Archaeology
Archaeology
description These studies were supported by the Portuguese Science Foundation through three research projects and three Ph.D. Grants, including the three awarded to Rita Castro, Paula Nabais and Tatiana Vitorino (Ph.D. Grant Nos. SFRH/BD/76789/2011, CORES Ph.D. programme PD/BD/105895/2014 and PD/BD/105902/2014), and through the scientific infrastructures funded through RECI/QEQ-MED/0330/2012, REM2013 and the Associated Laboratory for Sustainable Chemistry-Clean Processes and Technologies-LAQV, which is financed by national funds from FCT/MEC (UID/QUI/50006/2015) and co-financed by the ERDF under the PT2020 Partnership Agreement (POCI-01-0145-FEDER-007265). Support was also given by the Calouste Gulbenkian Foundation award 'Estimulo a Investigacao 2016' (146301).
publishDate 2018
dc.date.none.fl_str_mv 2018-12-01
2018-12-01T00:00:00Z
2019-01-25T23:41:22Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://doi.org/10.1186/s40494-018-0178-1
url https://doi.org/10.1186/s40494-018-0178-1
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 2050-7445
PURE: 5585835
http://www.scopus.com/inward/record.url?scp=85043321115&partnerID=8YFLogxK
https://doi.org/10.1186/s40494-018-0178-1
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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