Ionic strength dependence of stability constant. Part 2: Spectrophotometric study of the dioxyvanadium + leucine system in the range 0.1 ≤ I ≤ 1.0

摘要

The dioxy vanadium + leucine system has been investigated by a combination of spectrophotometric and potentiometric methods at 25 ± 0.1°C and ionic strengths ranging from 0.1 to 1.0 mol dm~(-3) with NaClO_4as a backgr ound salt in the pH range 1.3-2.5, with high ligand-to-metal ratios. Parameters for dependence on ionic strength have been obtained for the protonation constant of leucine.