Journal Title
Title of Journal: Monatsh Chem
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Abbravation: Monatshefte für Chemie - Chemical Monthly
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Publisher
Springer Vienna
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Authors: Francesco Crea Concetta De Stefano Demetrio Milea Silvio Sammartano
Publish Date: 2010/04/20
Volume: 141, Issue: 5, Pages: 511-520
Abstract
The results of an investigation on the interactions between phytate ion myoinositol hexaphosphate Phy and some lanthanoid cations La3+ Nd3+ Sm3+ Dy3+ and Yb3+ are reported The stability constants of various LnH j Phy species Ln = generic lanthanoid were determined by potentiometry ISEH+ glass electrode in NaClaq at I = 015 mol dm−3 and t = 25 °C and the corresponding formation enthalpies by calorimetric titration The thermodynamic data obtained were used to provide a speciation scheme for the lanthanoidIII–phytate systems at different temperatures The sequestering ability of this ligand toward Ln3+ was also evaluated by calculation of pL50 values the total concentration of ligand necessary to bind 50 of a cation present in trace amounts under different conditions and equations were formulated to model their dependence on temperature and pH
Keywords:
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