Mean centering of ratio kinetic profiles as a novel spectrophotometric method for the simultaneous kinetic analysis of binary mixtures

In this paper, a new and very simple method was developed for the simultaneous determination of binary mixtures without prior separation steps. The method is based on the mean centering (MC) of ratio kinetic profiles. The mathematical explanation of the procedure is illustrated. In order to evaluate the applicability of the method a model data as well as an experimental data were tested. The results from experimental data relating to the simultaneous spectrophotometric determination of Co(II) and Ni(II) based on their complexation reactions with 1-(2ʹ-pyridylazo)-2-naphthol (PAN) in micellar media were presented as a real model for resolution of the binary systems. The analytical characteristics of the method such as detection limit, accuracy, precision, relative standard deviation (R.S.D.) and relative standard error (R.S.E.) were calculated.