Dílson Norio Ishikawa

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A spectrophotometric method was proposed for Ni(II) determination in alloys using a dopa-semiquinone (L) to form [Ni(II)(L) 3 ], ε = 9.3 x 10 L mol cm. The optimal conditions for the determination were: wavelength 590 nm, temperature 25 °C, reaction time 45 min and pH 7.5. The Beer’s law was obeyed for nickel from 3.33 x 10 to 1.78 x 10 mol L. The method(More)
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 Hg2+, Cu2+ and Pb2+ in water solution, at t = 0, 20 and 60 min of reaction.(More)
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