Interpretation of diffusion gradients in thin films (DGT) measurements: a systematic approach
dc.contributor.author | Galceran i Nogués, Josep | |
dc.contributor.author | Puy Llorens, Jaume | |
dc.date.accessioned | 2018-10-31T10:46:19Z | |
dc.date.available | 2018-10-31T10:46:19Z | |
dc.date.issued | 2015 | |
dc.date.updated | 2018-10-31T10:46:20Z | |
dc.description.abstract | Gaining insight into the physicochemical processes integrated in a DGT (diffusion gradients in thin films) measurement and combining them in a model can assist in retrieving fundamental information, both qualitative and quantitative, on the probed system. New experiments (such as varying the thicknesses of the gel or the resin layer) and their mathematical treatment to extract meaningful parameters have been suggested from theoretical considerations. The concept of lability degree is useful in describing an interpretation of the DGT concentration as the summation of the free metal concentration plus the labile fraction of all complexes multiplied by a ratio of diffusion coefficients. In some cases, the lability degree can be directly estimated with specific measurements and a very simple expression. We review the current status of these interpretations, including numerical simulations, with special focus on analytical expressions, because they can be more accessible to the standard DGTpractitioner. Present limitations and challenges for future work in DGT interpretation are also discussed. | |
dc.description.sponsorship | We thank all our co-workers along these years with DGT and especially to professor William Davison for his inspiration, creativity, kindness and leadership. This study was financially supported by the Spanish Ministry of Education and Science (Project 535 CTM2012-39183) and by the “Comissionat per a Universitats i Recerca del Departament d’Innovació, Universitats i Empresa de la Generalitat de Catalunya”. | |
dc.format.mimetype | application/pdf | |
dc.identifier.doi | https://doi.org/10.1071/EN14068 | |
dc.identifier.idgrec | 021833 | |
dc.identifier.issn | 1448-2517 | |
dc.identifier.uri | http://hdl.handle.net/10459.1/65017 | |
dc.language.iso | eng | |
dc.publisher | CSIRO Publishing | |
dc.relation | info:eu-repo/grantAgreement/MINECO//CTM2012-39183-C02-02/ES/FISICOQUIMICA DE LAS INTERACCIONES Y FENOMENOS DE TRANSPORTE A NIVEL COLOIDAL ENTRE IONES, MACROMOLECULAS Y NANOPARTICULAS DE INTERES AMBIENTAL/ | |
dc.relation.isformatof | Versió postprint del document publicat a: https://doi.org/10.1071/EN14068 | |
dc.relation.ispartof | Environmental Chemistry, 2015, vol. 12, núm. 2, p. 112-122 | |
dc.rights | (c) CSIRO, 2015 | |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | |
dc.title | Interpretation of diffusion gradients in thin films (DGT) measurements: a systematic approach | |
dc.type | info:eu-repo/semantics/article | |
dc.type.version | info:eu-repo/semantics/acceptedVersion |