Improvement of gelatine extraction from tuna skin using a eutectic solvent

The growing attention on sustainability in the food industry and waste management has increased interest in the valorisation of fish processing by-products, such as skin, which is rich in collagen and can be processed into gelatine. Traditional methods for gelatine extraction face significant challe...

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Detalles Bibliográficos
Autores: Gallego Rodríguez, Cristina, Vázquez Álvarez, José Antonio, Rodríguez Martínez, Héctor, Soto Campos, Ana María
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:Universidad de Santiago de Compostela (USC)
Repositorio:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
Idioma:inglés
OAI Identifier:oai:minerva.usc.gal:10347/43858
Acceso en línea:https://hdl.handle.net/10347/43858
Access Level:acceso abierto
Palabra clave:Eutectic
Gelatine
Tuna
Fish skin
Protein extraction
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spelling Improvement of gelatine extraction from tuna skin using a eutectic solventGallego Rodríguez, CristinaVázquez Álvarez, José AntonioRodríguez Martínez, HéctorSoto Campos, Ana MaríaEutecticGelatineTunaFish skinProtein extractionThe growing attention on sustainability in the food industry and waste management has increased interest in the valorisation of fish processing by-products, such as skin, which is rich in collagen and can be processed into gelatine. Traditional methods for gelatine extraction face significant challenges, particularly related to the use of harsh chemicals, environmental concerns, and inefficiencies in protein separation. This study proposes an improved method for gelatine extraction from tuna skin, using a eutectic solvent composed of urea and sodium acetate trihydrate, and also its 65 wt% aqueous solution, as maceration solvents. The method, applied to yellowfin and skipjack tuna skins, overcomes the limitations of previous approaches by reducing the extraction temperature and time, enhancing mass transfer, and improving the functional properties of the extracted gelatine. Compared to traditional extraction techniques and previous eutectic solvent-based methods, this approach avoids the use of aggressive solvents and the complex recovery of protein. The gelatine obtained exhibited improved characteristics, including higher hydroxyproline content, higher molecular weight of polypeptide chains, and better rheological properties (elastic modulus and melting and gelling temperatures). These improvements were more pronounced in the gelatine extracted from yellowfin tuna samples, particularly those pretreated with the aqueous solution of the eutectic mixture at 12 °C. The method also resulted in better thermal stability of the extracted gelatine, as confirmed by TGA analysis. This study highlights the potential of eutectic solvents, and their aqueous solutions, for efficient and sustainable gelatine extraction from fish skin, offering a promising alternative to traditional and less sustainable methods.ElsevierUniversidade de Santiago de Compostela. Centro Interdisciplinar de Investigación en Tecnoloxías Ambientais (CRETUS)Universidade de Santiago de Compostela. Departamento de Enxeñaría Química20252025-07-2120252025-07-21journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10347/43858reponame:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostelainstname:Universidad de Santiago de Compostela (USC)InglésengAgencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 PID2021-123622OB-I00open accesshttp://purl.org/coar/access_right/c_abf2© 2025 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/).http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:minerva.usc.gal:10347/438582026-06-15T12:47:27Z
dc.title.none.fl_str_mv Improvement of gelatine extraction from tuna skin using a eutectic solvent
title Improvement of gelatine extraction from tuna skin using a eutectic solvent
spellingShingle Improvement of gelatine extraction from tuna skin using a eutectic solvent
Gallego Rodríguez, Cristina
Eutectic
Gelatine
Tuna
Fish skin
Protein extraction
title_short Improvement of gelatine extraction from tuna skin using a eutectic solvent
title_full Improvement of gelatine extraction from tuna skin using a eutectic solvent
title_fullStr Improvement of gelatine extraction from tuna skin using a eutectic solvent
title_full_unstemmed Improvement of gelatine extraction from tuna skin using a eutectic solvent
title_sort Improvement of gelatine extraction from tuna skin using a eutectic solvent
dc.creator.none.fl_str_mv Gallego Rodríguez, Cristina
Vázquez Álvarez, José Antonio
Rodríguez Martínez, Héctor
Soto Campos, Ana María
author Gallego Rodríguez, Cristina
author_facet Gallego Rodríguez, Cristina
Vázquez Álvarez, José Antonio
Rodríguez Martínez, Héctor
Soto Campos, Ana María
author_role author
author2 Vázquez Álvarez, José Antonio
Rodríguez Martínez, Héctor
Soto Campos, Ana María
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade de Santiago de Compostela. Centro Interdisciplinar de Investigación en Tecnoloxías Ambientais (CRETUS)
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
dc.subject.none.fl_str_mv Eutectic
Gelatine
Tuna
Fish skin
Protein extraction
topic Eutectic
Gelatine
Tuna
Fish skin
Protein extraction
description The growing attention on sustainability in the food industry and waste management has increased interest in the valorisation of fish processing by-products, such as skin, which is rich in collagen and can be processed into gelatine. Traditional methods for gelatine extraction face significant challenges, particularly related to the use of harsh chemicals, environmental concerns, and inefficiencies in protein separation. This study proposes an improved method for gelatine extraction from tuna skin, using a eutectic solvent composed of urea and sodium acetate trihydrate, and also its 65 wt% aqueous solution, as maceration solvents. The method, applied to yellowfin and skipjack tuna skins, overcomes the limitations of previous approaches by reducing the extraction temperature and time, enhancing mass transfer, and improving the functional properties of the extracted gelatine. Compared to traditional extraction techniques and previous eutectic solvent-based methods, this approach avoids the use of aggressive solvents and the complex recovery of protein. The gelatine obtained exhibited improved characteristics, including higher hydroxyproline content, higher molecular weight of polypeptide chains, and better rheological properties (elastic modulus and melting and gelling temperatures). These improvements were more pronounced in the gelatine extracted from yellowfin tuna samples, particularly those pretreated with the aqueous solution of the eutectic mixture at 12 °C. The method also resulted in better thermal stability of the extracted gelatine, as confirmed by TGA analysis. This study highlights the potential of eutectic solvents, and their aqueous solutions, for efficient and sustainable gelatine extraction from fish skin, offering a promising alternative to traditional and less sustainable methods.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025-07-21
2025
2025-07-21
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10347/43858
url https://hdl.handle.net/10347/43858
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 PID2021-123622OB-I00
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
instname:Universidad de Santiago de Compostela (USC)
instname_str Universidad de Santiago de Compostela (USC)
reponame_str Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
collection Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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