Potentiometric measurements in different media and at different temperatures were performed in order to determine protonation constants of glyphosate and formation constants for Ca2+ and Mg2+ complexes, together with their dependence on ionic strength and ▵H0 values. Calorimetric measurements were also performed to determine ▵H0 of protonation. Potentiometric measurements in mixed Ca2+ and Mg2+ solution allowed us to determine the formation of a mixed metal species. Thermodynamic parameters reported in this work can be used for studying the complete speciation of glp in electrolyte solutions containing the major ionic components of natural fluids.
Speciation of N-(phosphonomethyl)glycine (glyphosate) in aqueous solutions containing major components of natural fluids
MINEO, PLACIDO;
1996-01-01
Abstract
Potentiometric measurements in different media and at different temperatures were performed in order to determine protonation constants of glyphosate and formation constants for Ca2+ and Mg2+ complexes, together with their dependence on ionic strength and ▵H0 values. Calorimetric measurements were also performed to determine ▵H0 of protonation. Potentiometric measurements in mixed Ca2+ and Mg2+ solution allowed us to determine the formation of a mixed metal species. Thermodynamic parameters reported in this work can be used for studying the complete speciation of glp in electrolyte solutions containing the major ionic components of natural fluids.| File | Dimensione | Formato | |
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