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KMID : 1059519940380020146
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Journal of the Korean Chemical Society
1994 Volume.38 No. 2 p.146 ~ p.150
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Simultaneous Determination of Zinc, Cadmium, Lead and Copper in Tungsten Matrix by Differential Pulse Anodic Stripping Voltammetry
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Bae Zun-Ung
Lee Sung-Ho
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Abstract
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The simultaneous determination of Zn, Cd, Pb and Cu in 1.000%(w/v) tungsten matrix by differential pulse anodic stripping voltammetry at a hanging mercury drop electrode has been studied. Tartaric acid(pH=5.00) was used as a supporting electrolyte. Optimum analytical conditions were found that the deposition potential was -1.2 volt(vs. Ag/AgCl), the deposition time was 3 minutes. The linear concentration range of all trace metal ions in 1.000%(w/v) tungsten matrix were 10 to 50 ppb. And the detection limit(3σ) of zinc, cadmium, lead and copper were 1.25, 1.02, 1.69, and 1.02 ppb respectively. This method was superior to the ICP-AES method which detection limits(3σ) in 1.000%(w/v) tungsten matrix were 8.0, 5.0, 120 and 5 ppb respectively.
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