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Determination of 18 Trace-impurities in High Purity Platinum by ICP-MS
Author(s): 
Pages: 60-66
Year: Issue:  3
Journal: Precious Metals

Keyword:  analytical chemistryinductively coupled plasma mass spectrometry (ICP-MS)reaction cell technologyhigh purity platinumtrace impurities;
Abstract: The interferences for Cr, Si and Au produced by polyatomic ions were eliminated by reaction cell technology and the interference with minus equivalent concentration method. The other 15 impurities were determined directly by intemal standard correction method. The samples were dissolved in HCl-HNO3. Under the optimized conditions of measured isotopes and intemal standard elements, the matrix effects were investigated and the method for the analysis of 18 trace-impurities in high purity platinum was established. Determination limits obtained ranged 0.0031~1.16 ng/mL for 18 impurities. The recovery of standard addition was in the range of 85.7%~119.8%, and the relative standard deviation (RSD) was 1.76%~4.50%. The method can be used for the analysis of 4~5 N high purity platinum products.
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