Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/4105
Title: Determination of dynamic dissociation constant of chromium-poly(N-vinyl­pyrro­lidone) complex by the radiotracer technique
Authors: Nayak, Dalia
Banerjee, Anupam
Ghosh, Kingshuk
Das, Ayan
Lahiri, Susanta
Keywords: Solution chemistry
Dissociation constants
Binding ability
Stability
Radiotracer technique
Chromium
Issue Date: May-2009
Publisher: CSIR
Abstract: The binding ability of polyvinylpyrrolidone (PVP) with chromium in its different oxidation states has been investigated. The complexation of PVP towards Cr(III) and Cr(VI) labeled with <sup>51</sup>Cr radionuclide has been studied with the dialysis technique. The stability of the complexes has been examined by measuring the dynamic dissociation constant from the slope of the plot of ln{Cr(VI)/(III)-PVP} versus time. It has been observed that both Cr(VI)-PVP and Cr(III)-PVP complexes are most stable at <i>p</i>H 7. However, the Cr(III)-PVP complex is more stable than the Cr(VI)-PVP complex at all <i>p</i>H values. This study shows the comparative stability of the complexes of the two different species of chromium with PVP, which may be useful in radiopharmaceutical sciences.
Description: 672-675
URI: http://hdl.handle.net/123456789/4105
ISSN: 0376-4710
Appears in Collections:IJC-A Vol.48A(05) [May 2009]

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