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KMID : 1059519950390040252
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Journal of the Korean Chemical Society
1995 Volume.39 No. 4 p.252 ~ p.256
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Direct Determination Method of Antimony in High Purity Copper Metal by Graphite Furnace Atomic Absorption Spectrometry
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Yoo Kwang-Sik
Kim Jong-Dae
Kwon Jin-Gi
Lee J.-J.
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Abstract
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A study was carried out for the development of direct determination of antimony in high purity copper metal without preseparation. The large excess of copper seemed to be performed as the matrix modifier to enhance the absorbance of antimony in copper metal. Sensitivity enhancement of Sb was obtained at the condition of the ashing temperature of 600℃(20s)∼700℃(10s) rather than 1000℃(20s)∼1100℃(10s), and the atomization temperature of 2200℃. The operating pressure of argon gas was readjusted to the optimum condition at 2.0 kg/cm2. The linearity of the Sb calibration graph could be obtained in the range of 20 ppb up to 200 ppb Sb in existence of 5,000 ppm Cu with the coefficient of variation of about 5%.
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