| Revista: | Ecletica quimica |
| Base de datos: | |
| Número de sistema: | 000552806 |
| ISSN: | 0100-4670 |
| Autors: | Barreto, Wagner José1 Magosso, Herica Aparecida1 Soares, Miriam Fátima1 Oliveira Silveira, Bruno Marco1 Spacino Scarminio, Ieda1 Norio Ishikawa, Dílson1 Giancoli Barreto, Sônia Regina1 |
| Institucions: | 1Universidade Estadual de Londrina, Departamento de Química, Londrina, Brasil., |
| Any: | 2011 |
| Volum: | 36 |
| Número: | 3 |
| Paginació: | 15-20 |
| País: | Brasil |
| Idioma: | Inglés |
| Resumen en inglés | 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. |
| Keyword: | Chromogenic reagent, Ni(II) quantification, Co and Ti interferents |
| Text complet: | Texto completo (Ver PDF) |
