This work investigates the applicability of the anionic complex [NBu4]2[Zn(1,3-dithiol-2-tione-4,5-dithiolate)2] on the simultaneous spectrophotometric determination of transition metals. Principal Component Regression was used in the data analysis. This method was used to determine Hg 2+ , Cu 2+ and Pb 2+ in water solution, at t = 0, 20 and 60 min of reaction. The root mean square errors (rms) for Hg 2+ , Cu 2+ , Pb 2+ were 1.92 × 10 -7 , 1.89 × 10 -7 and 9.35 × 10 -8 for t = 0 min, 1.79 × 10 -7 , 2.1 × 10 -7 and 2.22 × 10 -7 for t = 20 min and 1.22 × 10 -7 , 1.31 × 10 -7 and 1.10 × 10 -7 for t = 60 min, respectively. Results showed the viability of the method in determining concentrations of metallic ions in aqueous medium with high spectral overlap. It is an efficient alternative method for exploring the kinetic behavior of multicomponents systems of interest in physicochemical research.
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