Simultaneous determination of seven impurities in high-purity cobalt oxide by ICP-AES after matrix separation using 1-nitroso-2-naphthol as a precipitant

被引：7
|
作者：
Wang, Y [1 ]
Zhou, CS
Duan, QB
Chen, P
机构：
[1] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China
[2] Baling Petrochem Ltd Co, Qual Inspect Ctr Hexanelactam Plant, Yueyang 414003, Peoples R China
来源：
JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY | 2002年 / 9卷 / 02期
关键词：
trace impurity; high-purity cobalt oxide; matrix separation; inductively coupled plasma atomic emission spectrometry (ICP-AES);
D O I：
10.1007/s11771-002-0051-x
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
A method was developed for the simultaneous determination of seven trace impurities (Cd, Mn. Pb, Zn, Cu, Fe and Ni) in high-purity cobalt oxide by ICP-AES. The matrix effect was eliminated by precipitation with 1-nitroso-2-naphthol. The matrix effect of cobalt on the absorptions of trace impurities, the effects of reaction time, pH value, dosage of precipitant on the formation of cobalt-1-nitroso-2-naphthol complex, the effects of hydrochloric acid on the stability of this complex and masking of elements were studied. Recoveries of the impurities in spiked sample are from 90% to 110% with a precision of 1.1%-5.0% RSD. The detection limits of the seven elements are in the range of 0.01-0.24 mug/g. ne method can be applied to the analysis of high-purity cobalt metal, cobalt oxide and other cobalt compounds.
引用
收藏
页码：100 / 103
页数：4
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