Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Determination of Trace Elements of Ge and P in a Gold Bonding Wire by Inductively Coupled Plasma Atomic Emission Spectrometry

  • Choi, Sung-Min (Department of Chemistry, Chungnam National University) ;
  • Lee, Gae-Ho (Department of Chemistry, Chungnam National University) ;
  • Han, Jae-Kil (Department of Surface & Nano Technology)
  • Published : 2008.02.20
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Abstract

Inductively coupled plasma atomic emission spectrometry (ICP-AES) was used to determine the presence of germanium and phosphorus in a pure gold bonding wire. The samples were dissolved with hydrobromic acid and nitric acid at room temperature. The quantitation limits were 0.012 mg L-1 at 265.118 nm for Ge and 0.009 mg L-1 at 177.495 nm for P. Using the mixed acid digestion formula of DIW+HBr+HNO3, the recoveries were in the range of 98-100% and the relative standard deviation was within 1.1-2.3%. On the other hand, the amount of Ge decreased by about 16.2% using DIW+HCl+HNO3, due to the formation of a volatile compound. The Ge contents determined using the external method and the standard addition method were 9.45 mg kg-1 and 9.24 mg kg-1, respectively, and the P contents, using the same methods, were 22.49 mg kg-1 and 23.09 mg kg-1, respectively. Both methods were successfully used to determine the trace amounts of P and Ge in the pure gold bonding wire samples.

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References

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