Citation: Hua Lin XIE, Xi Du NIE, You Gen TANG. Quantification of Trace Amounts of Impurities in High Purity Cobalt by High Resolution Inductively Coupled Plasma Mass Spectrometry[J]. Chinese Chemical Letters, ;2006, 17(8): 1077-1080. shu

Quantification of Trace Amounts of Impurities in High Purity Cobalt by High Resolution Inductively Coupled Plasma Mass Spectrometry

1.
Department of Chemistry, Hunan Institute of Technology, Hengyang 421008;
2.
School of Chemistry and Chemical Engineering, Central south university, Changsha 410083

Received Date: 22 February 2006

Fund Project: This work was supported by the Natural Science Foundation of Hunan Province (No. 05JJ40017) and Education Department of Hunan Province (No. 05B064).

An analytical method using high resolution inductively coupled plasma mass spectrometry (HR-ICP-MS) for rapid simultaneous determination of Be, Mg, Al, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Ga, Ge, As, Se, Mo, Ag, Cd, Sn, Sb, Ba, Pt, Au and Pb in high purity cobalt was described. Sample digestions were performed in closed microwave vessels using HNO₃ and HCl. The matrix effects due to thc presence of excess HCl and Co were evaluated. The usefulness of high mass resolution for overcoming some spectral interference was demonstrated. The optimum conditions for the determination was tested and discussed. Correction for matrix effects, Sc, Rh and Bi were used as internal standards. The detection limits is 0.003-0.57 μg/g, the recovery ratio is 92.2%-111.2%, and the RSD is less than 3.6%. The method is accurate, quick and convenient. It has been applied to the determination of trace impurities in high purity cobalt with satisfactory results.
- High resolution inductively coupled plasma mass spectrometry,
- high purity cobalt,
- trace impurities,
- matrix effect,
- spectral interference,
- internal standards
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