SPECIATION OF N-(PHOSPHONOMETHYL)GLYCINE (GLYPHOSATE) IN AQUEOUS-SOLUTIONS CONTAINING MAJOR COMPONENTS OF NATURAL FLUIDS

Authors
ABATE L MINEO P RIGANO C DANIELE PG PRENESTI E DESTEFANO C SAMMARTANO S
Citation
L. Abate et al., SPECIATION OF N-(PHOSPHONOMETHYL)GLYCINE (GLYPHOSATE) IN AQUEOUS-SOLUTIONS CONTAINING MAJOR COMPONENTS OF NATURAL FLUIDS, Chemical speciation and bioavailability, 8(3-4), 1996, pp. 59-65
Citations number
31
Categorie Soggetti
Environmental Sciences",Toxicology,Biology
Journal title
Chemical speciation and bioavailability → ACNP
ISSN journal
09542299
Volume
8
Issue
3-4
Year of publication
1996
Pages
59 - 65
Database
ISI
SICI code
0954-2299(1996)8:3-4<59:SON(IA>2.0.ZU;2-F
Abstract
Potentiometric measurements in different media and at different temper atures were performed in order to determine protonation constants of g lyphosate and formation constants for Ca2+ and Mg2+ complexes, togethe r with their dependence on ionic strength and Delta H-0 lo values. Cal orimetric measurements were also performed to determine Delta H-0 of p rotonation. Potentiometric measurements in mixed Ca2+ and Mg2+ solutio n allowed us to determine the formation of a mixed metal species. Ther modyn amic parameters reported in this work can be used for studying t he complete speciation of glp in electrolyte solutions containing the major ionic components of natural fluids.