Photo-degradation of alfalfa saponins by UV–visible multi-wavelength irradiation
| dc.contributor.author | Hadidi, Milad | |
| dc.contributor.author | Garvín, Alfonso | |
| dc.contributor.author | Ibarz, Raquel | |
| dc.contributor.author | Ibarz Ribas, Alberto | |
| dc.date.accessioned | 2021-12-23T10:19:43Z | |
| dc.date.available | 2021-12-23T10:19:43Z | |
| dc.date.issued | 2022 | |
| dc.identifier.issn | 0023-6438 | |
| dc.identifier.uri | http://hdl.handle.net/10459.1/72633 | |
| dc.description.abstract | A 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.iso | eng | ca_ES |
| dc.publisher | Elsevier | ca_ES |
| dc.relation.isformatof | Reproducció del document publicat a https://doi.org/10.1016/j.lwt.2021.112809 | ca_ES |
| dc.relation.ispartof | LWT Food Science and Technology, 2022, vol. 154, núm.112859, p.1-7 | ca_ES |
| dc.rights | cc-by, (c) Hadidi et al., 2022 | ca_ES |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | * |
| dc.subject | Alfalfa | ca_ES |
| dc.subject | UV irradiation | ca_ES |
| dc.subject | Saponin | ca_ES |
| dc.subject | Kinetic | ca_ES |
| dc.subject.other | Alfals | ca_ES |
| dc.subject.other | Cinemàtica | ca_ES |
| dc.title | Photo-degradation of alfalfa saponins by UV–visible multi-wavelength irradiation | ca_ES |
| dc.type | info:eu-repo/semantics/article | ca_ES |
| dc.identifier.idgrec | 031868 | |
| dc.type.version | info:eu-repo/semantics/publishedVersion | ca_ES |
| dc.rights.accessRights | info:eu-repo/semantics/openAccess | ca_ES |
| dc.identifier.doi | https://doi.org/10.1016/j.lwt.2021.112809 |
Files in this item
This item appears in the following Collection(s)
Except where otherwise noted, this item's license is described as cc-by, (c) Hadidi et al., 2022