Speciation of phytate ion in aqueous solution. Characterisation of Ca-phytate sparingly soluble species

Speciation of phytate ion in aqueous solution. Dimethyltin(IV) interactions in NaClaq at different ionic strengths

“…Our previous studies on phytic acid yielded some useful relationships for modeling its thermodynamic behavior in aqueous solution [1][2][3][4][5]. The wide number of species formed by phytate and dimethyltin(IV) suggested we might find some regularities in the stability of these ion pairs.…”

“…Many papers dealing with phytate -metal cation interactions (with particular emphasis given to the bioavailability of metals in the presence of the ligand, see references in [1][2][3][4][5][6][7][8]) can be found in literature, but, to our knowledge, no articles have yet been published on the interactions between this ligand and organometal cations. Therefore, the system investigated is completely new, and the results of our study must be considered as original.…”

“…In order to understand the speciation of phytic acid in aqueous solution, in previous papers we determined (in various aqueous media and at different ionic strengths): (i) its protonation constants [1,2]; (ii) its complex formation constants with alkali metal cations [2]; (iii) its binding ability towards other ligands of biological or environmental interest such as biogenic amines [3]; (iv) the solubility of some calcium complexes [4]; (v) its protonation enthalpies and entropies [5]. In these studies, several equations for the dependence of thermodynamic parameters on ionic medium and/or ionic strength and numerous predictive relationships were proposed.…”

Speciation of Phytate Ion in Aqueous Solution. Trimethyltin(IV) Interactions in Self Medium

“…In fact, in our previous papers we thoroughly described the peculiarities of this molecule from a chemical, biological and environmental point of view, and we stressed several times that, despite the huge number of literature on phytate and its derivatives [see, for example, references in previous contributions [1][2][3][4][5][6][7][8][9] and in reviews [10][11][12][13] ], few quantitative data are presented on the modeling of their thermodynamic behavior in aqueous media. In this light, in our latest works we paid particular attention to the phytate speciation study in presence of heavy metal and organometal cations, such as mercury(II), 7 cadmium(II), 9 and dimethyltin(IV) cations.…”

“…In this light, in our latest works we paid particular attention to the phytate speciation study in presence of heavy metal and organometal cations, such as mercury(II), 7 cadmium(II), 9 and dimethyltin(IV) cations. 6 Here we † Previous contributions to this series: [1][2][3][4][5][6][7][8][9]. ‡ Measurements were performed on titrand solutions consisting only of phytic acid (2-10 mmol L -1 ) and tmt at total concentrations C tmt > 0.05 mol L -1 , without further addition of any background salts (self medium).…”