Subspeciation of nickel disulfide by carbon paste electrode voltammetry catalyzed by Ni2+

被引：0
|
作者：
John L. Wong
Wenrui Jin
Yanan He
机构：
[1] Department of Chemistry,
[2] University of Louisville,undefined
[3] Louisville,undefined
[4] KY 40292,undefined
[5] USA e-mail: jlwong01@louisville.edu,undefined
来源：
Fresenius' Journal of Analytical Chemistry | 2001年 / 369卷
关键词：
Acetate; Nickel; Sulfide; Detection Limit; Disulfide;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In subspeciation of sulfidic nickel, carbon paste electrode voltammetry was developed for the specific determination of Ni3S2 or NiS, but NiS2 was found to be unreactive. Ni2+ in pH 7.2 acetate solution was able to catalyze NiS2 to undergo redox reactions. The cyclic voltammogram showed two anodic peaks at –0.3 and +0.7 V and a cathodic peak at –0.6 V. The first anodic peak at –0.3 V and the cathodic peak were common among the three nickel sulfides, but the second anodic peak at +0.7 V was unique to NiS2. This peak current gave a linear dose response to NiS2 from 40 to 610 μg, with a correlation coefficient of 0.994, and a detection limit of 40 μg.
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页码：587 / 588
页数：1
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