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Determination of Germanium (IV) Content in the Korean Medicinal Herbs by Adsorption Stripping Voltammetry
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1998, v.11 no.5, pp.400-403
Jeong,
S., Chun,
H., &
Kim,
I.
(1998). Determination of Germanium (IV) Content in the Korean Medicinal Herbs by Adsorption Stripping Voltammetry. Analytical Science and Technology, 11(5), 400-403.
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Abstract
The germanium content of the cultivated Korean medicinal herbs in several growing district was determined by adsorption stripping voltammetry. The optimum conditions in germanium determination were as following: deposition time; 120 sec, deposition potential; -0.9 volts vs. Ag/AgCl, and frequency; 100 Hz in <TEX>$5.0{\times}10^{-2}M$</TEX> perchloric acid supporting electrolyte solution containing <TEX>$8.0{\times}10^{-2}M$</TEX> catechol. Calibration curve was shown a good lineality in the range of 0.4 ppb to 2.0 ppm and the detection limit was 0.08 ppb. There was a large difference in content of the cultivated hermit leaf according to growing district such as 29.7~385.7 ppm and the content of nontreated hermit leaf was higher than the processed health foodstuffs. The content of the Korean ginseng (5 years) was 83 ppm while the Korean herb of life was 214 ppm.
- keywords
- Korean hermit, germanium determination, stripping voltammetry
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