title: Methodological approach to the study of the formation and physicochemical properties of phosphate-metal-humic complexes in solution.
abstract: The aim of this work is to study the suitability of the complementary use of ultrafiltration (UF) and the interaction with an anion-exchange resin (AR) to characterize of phosphate-metal-humic complexes in solution. The results indicate that a methodological approach consisting of the validation and calibration of the AR method by the UF method and the further use of the AR method is suitable for characterizing phosphate-metal complexes. Such an approach has proven to be useful for calculating the phosphate maximum binding capacity of iron-humic complexes and stability constants. It might also be used to obtain valuable purified phosphate-metal-humic complexes for further structural characterization.
authors.affiliation: Department of Chemistry and Soil Chemistry, University of Navarra, 31080 Pamplona, Spain.
authors.forename: Iñaki
authors.initials: I
authors.lastname: Guardado
authors.forename: Oscar
authors.initials: O
authors.lastname: Urrutia
authors.forename: Jose M
authors.initials: JM
authors.lastname: Garcia-Mina
mesh_terms: D000838:Anions; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004355:Drug Stability; D006812:Humic Substances; D007475:Ion Exchange Resins / Q000737:chemistry; D008670:Metals / Q000737:chemistry*; D010710:Phosphates / Q000737:chemistry*; D012996:Solutions; D014462:Ultrafiltration
chemical_list: D000838:Anions; D006812:Humic Substances; D007475:Ion Exchange Resins; D008670:Metals; D010710:Phosphates; D012996:Solutions