Interaction of Dioxovanadium(V) Ion with Methionine at Different Ionic Strengths
محورهای موضوعی : Journal of Physical & Theoretical Chemistry
M. Kia
1
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)
F. Gharib
2
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)
G. Ghasemi
3
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)
کلید واژه: Ionic strength, Formation constant, Methionine, Dioxovanadium(V),
چکیده مقاله :
The dependence on ionic strength of protonation of methionine and its complexation with dioxovanadium(V) isreported in sodium perchlorate solution as supporting electrolyte. The measurements have been performed at 25C using a combination of potentiometric and spectrophotometric techniques. The overall analysis of the presentand the previous data dealing with determination of stability constants at different ionic strengths allowed us toobtain a general equation, by which a formation constant determined at a fixed ionic strength can berecalculated, with a good approximation for another ionic strength in the range of 0.1 0.7 mol dm-3.