Spectral interferances due to major elements in samples are severe problems in the determination of trace elements, when 0.1N-HCl extractable trace heavy metal elements in soil samples are analyzed by ICP spectrometry. So, we examined analytical conditions for each trace element, and estimated correction coefficients for spectral interferance of major elements with those elements. Consequently, major elements little influenced on the estimation of Ti, Cu, Mn, V, Zn, a little influenced on Co, Cr and strongly influenced on Cd, Pb, Ni, Sn in ICP spectrometry. And, by using the correction coefficients for trace elements, the estimation of those elements could be performed without matrix matching of standard solution, high correlations were admitted between analytical values for Cu, Zn, Ni, Cd obtained by ICP spectrometry and atomic absorption spectrometry, which were r= 0.994〜0.999.
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