title: Stability study of Iprodione in alkaline media in the presence of humic acids.
abstract: The influence of humic aggregates in water solution upon the chemical stability of Iprodione has been investigated under basic conditions. Taking into account that an important part of soils are colloids, the possibility of its presence implies that soil composition and its structure will play an important role in the stability of this pesticide. A kinetic model was applied to this system and the kinetic coefficients were obtained. An inhibition upon the alkaline hydrolysis of Iprodione (2-fold) was observed and it was rationalized in terms of the micellar pseudophase model. These results have been compared with the corresponding ones in the same natural colloidal aggregates in the presence of other pesticides.
authors.affiliation: Department of Physical Chemistry, Faculty of Sciences, University of Vigo, 32004 Ourense, Spain. morales@uvigo.es
authors.forename: Jorge
authors.initials: J
authors.lastname: Morales
authors.forename: José A
authors.initials: JA
authors.lastname: Manso
authors.forename: Antonio
authors.initials: A
authors.lastname: Cid
authors.forename: Juan C
authors.initials: JC
authors.lastname: Mejuto
mesh_terms: D000620:Aminoimidazole Carboxamide / Q000031:analogs & derivatives* / Q000737:chemistry; D004355:Drug Stability; D006812:Humic Substances; D006827:Hydantoins / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis
chemical_list: D006812:Humic Substances; D006827:Hydantoins; D000620:Aminoimidazole Carboxamide; C033148:iprodione
keywords: Colloids; Humic acids; Humic substances; Hydrolysis; Iprodione; Xenobiotic