Quimica nova | |
Determination of Ni(II) in metal alloys by spectrophotometry UV-Vis using dopasemiquinone | |
Soares, Miriam de Fátima1  Barreto, Sonia Regina Giancoli1  Barreto, Wagner José1  Scarminio, Ieda Spacino1  Ishikawa, Dílson Norio1  Proença, Marcus Vinícius Brás de1  | |
[1] Universidade Estadual de Londrina, Londrina, Brasil | |
关键词: UV-Vis spectrophotometry; nickel; metals.; | |
DOI : 10.1590/S0100-40422010000100020 | |
学科分类:化学(综合) | |
来源: Sociedade Brasileira de Quimica | |
【 摘 要 】
A spectrophotometricmethod was proposed for Ni(II) determination in alloys using a dopa-semiquinone(L-1) to form [Ni(II)(L1-)3]1-,ε= 9.3 x 103 L mol-1 cm-1. The optimal conditionsfor the determination were: wavelength 590 nm, temperature 25 °C, reactiontime 45 min and pH 7.5. The Beer's law was obeyed for nickel from 3.33 x 10-5to 1.78 x 10-4 mol L-1. The method was applied to complexsamples, such as inox, nickel-titanium and cobalt-chromium alloys. A study ofthe potential interferents revealed that Mn was the major interferent. The limitof detection and quantification were 2.88 x 10-5 mol L-1and 3.06 x 10-5 mol L-1, respectively.
【 授权许可】
CC BY
【 预 览 】
Files | Size | Format | View |
---|---|---|---|
RO201902010286008ZK.pdf | 255KB | download |