Abstract
Kinetic methods for determination of Co(II), Ni(II) and Pd(II) have been developed. The reaction rate methods are based on the competitive equilibria of oxidation and complexation between benzyl 2-pyridyl ketone 2-pyridylhydrazone, bromate and the three metal ions. The influence of the stoichiometry and stability constant of the complexes on the sensitivity of the methods is evaluated. The methods established have limits of detection at the µg/ml level and relative standard deviations of 3–7%. The effect of several foreign ions is discussed. Application of the methods to synthetic mixtures is also described.
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