期刊论文详细信息
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
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【 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   

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