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http://nopr.niscpr.res.in/handle/123456789/43845| Title: | Equilibrium studies on interactions of rare earth ions with phytic acid |
| Authors: | Siddiqi, K S Shah, S A Aqra, Fathi M A M Tabassum, S Zaidi, S A A Benlian, O |
| Issue Date: | May-1993 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The interaction between phytic acid and trivalent rare earth metal ions, viz., Ce3+, Pr3+, Nd3+, Sm3+, Gd3+, Tb3+, Dy3+ and HO3+ has been investigated potentiometrically at 25ᵒC. The proton-ligand stability constants (pK ) of phytic acid and the stability constants (logK) of metal complexes formed in aqueous medium (μ = 0.1 M NaClO4) have been evaluated. The results indicate that eight protons of phytic acid are highly acidic, two are weakly acidic and two very weakly acidic, titrable in the pH ranges 1.2-4.9, 5.0-8.15 and 8.3-11.0 respectively. The stability of each phytic acid-lanthanide ion complex decreases with an increase in pH and follows the usual trend through the series. |
| Page(s): | 421-423 |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Appears in Collections: | IJC-A Vol.32A(05) [May 1993] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCA 32A(5) 421-423.pdf | 1.99 MB | Adobe PDF | View/Open |
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