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dc.contributor.authorHadidi, Milad
dc.contributor.authorGarvín, Alfonso
dc.contributor.authorIbarz, Raquel
dc.contributor.authorIbarz Ribas, Alberto
dc.date.accessioned2021-12-23T10:19:43Z
dc.date.available2021-12-23T10:19:43Z
dc.date.issued2022
dc.identifier.issn0023-6438
dc.identifier.urihttp://hdl.handle.net/10459.1/72633
dc.description.abstractA photochemical treatment with UV multi-wavelength irradiation was applied to investigate the degradation of the saponins mixture obtained from alfalfa leaves. The photo-degradation was studied in an aqueous solution at a pH range of 4–7 and temperature range of 20–80 °C. The samples were irradiated for 80 min using a mid-pressure mercury lamp with emission wavelengths between 250 and 740 nm. The dependence of the absorbed radiation on the concentration of alfalfa saponins was evaluated, and a linear dependence was found for the range of concentrations experimented throughout the photo-degradation. The alfalfa saponins mixture absorbed radiation between 470 and 610 nm with a maximum absorption peak at 543 nm. This means that any lamp emitting within this wavelength range could produce some degree of photo-degradation. A reaction mechanism was proposed, matching the experimental pseudo-first-order kinetic model that best fitted the evolution of the saponins mixture concentration. The photo-degradation rate was found to increase with increasing temperature and decreasing pH value, causing a reduction of 80% in the concentration of the alfalfa saponins mixture after 80 min at pH 4 and 80 °C.ca_ES
dc.language.isoengca_ES
dc.publisherElsevierca_ES
dc.relation.isformatofReproducció del document publicat a https://doi.org/10.1016/j.lwt.2021.112809ca_ES
dc.relation.ispartofLWT Food Science and Technology, 2022, vol. 154, núm.112859, p.1-7ca_ES
dc.rightscc-by, (c) Hadidi et al., 2022ca_ES
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectAlfalfaca_ES
dc.subjectUV irradiationca_ES
dc.subjectSaponinca_ES
dc.subjectKineticca_ES
dc.subject.otherAlfalsca_ES
dc.subject.otherCinemàticaca_ES
dc.titlePhoto-degradation of alfalfa saponins by UV–visible multi-wavelength irradiationca_ES
dc.typeinfo:eu-repo/semantics/articleca_ES
dc.identifier.idgrec031868
dc.type.versioninfo:eu-repo/semantics/publishedVersionca_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_ES
dc.identifier.doihttps://doi.org/10.1016/j.lwt.2021.112809


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cc-by, (c) Hadidi et al., 2022
Except where otherwise noted, this item's license is described as cc-by, (c) Hadidi et al., 2022