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Investigation of Acids on the Germanium Analysis by HG-ICP-AES
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2001, v.14 no.1, pp.34-43
Lim,
H., Lee,
Y., Kim,
S., Kim,
Y., &
Kim,
K.
(2001). Investigation of Acids on the Germanium Analysis by HG-ICP-AES. Analytical Science and Technology, 14(1), 34-43.
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Abstract
The present work is aimed to evaluate the conditions of the hydride generation (HG) for germanium analysis by inductively coupled plasma (ICP)-atomic emission spectrometry (AES). Twelve different kinds of acids were used such as phosphoric, hydrochloric, nitric, sulfuric, perchloric, boric, tartaric, malic, oxalic, tannic, citric, and acetic acid. It was found that phosphoric acid yielded the maximum efficiency of hydride generation. Also, efficient hydride generation was obtined with the buffer solutions containing phosphate ions over a wide range of pH. In addition, in the presence of phosphoric acid the interference caused by metals was suppressed in the hydride generation of germanium. As the concentrations of a reducing agent and a stabilizing increased the hydride generation efficiency and the acid concentration proviaing the maximum intensity were increased. By using an analytical method developed in this study, the contents of germanium in water and rock samples were determined. The detection limit of germanium in the presence of phosphoric acid was <TEX>$0.03{\mu}g/L$</TEX>.
- keywords
- germanium analysis, phosphoric acid, phosphate ion, HG-ICP-AES
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