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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 29, Number 2
BKCSDE 29(2)
February 20, 2008 

Determination of Trace Elements of Ge and P in a Gold Bonding Wire by Inductively Coupled Plasma Atomic Emission Spectrometry
Sung-Min Choi, Gae-Ho Lee*, Jae-Kil Han
ICP-AES, Gold, Trace, Ge, P
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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