Determination of Ni(II) in alloys using a new reagent derived from L-dopa
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Keywords

Chromogenic reagent
Ni(II) quantification
Co and Ti interferents

How to Cite

Barreto, W. J., Magosso, H. A., Soares, M. F., Oliveira Silveira, B. M., Spacino Scarminio, I., Norio Ishikawa, D., & Giancoli Barreto, S. R. (2014). Determination of Ni(II) in alloys using a new reagent derived from L-dopa. Eclética Química, 36(3), 15–20. https://doi.org/10.26850/1678-4618eqj.v36.3.2011.p15-20

Abstract

A simple and sensitive UV-Vis spectrophotometric method was developed using a new chromogenic reagent, L-dopasemiquinone, for the quantification of Ni(II) in metallic alloys: Inox, Co-Cr, and Ni-Ti. The complex [Ni(II)(L1-)3]1- presents an intense band at 591 nm, ε = 2.4 x 103 L mol-1 cm-1. Beer’s law is obeyed from 4.02 x 10-5 to 2.01 x 10-4 mol L-1 with limits of detection and quantification of 4.15 x 10-5 mol L-1 and 5.02 x 10-5 mol L-1, respectively. The method was compared with atomic absorption spectrophotometry and inductively coupled plasma atomic emission spectroscopy obtaining good results. Cobalt and Titanium cause low interference in the method.

https://doi.org/10.26850/1678-4618eqj.v36.3.2011.p15-20
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