<報文>誘導結合プラズマ発光分析法による水田土壌中の重金属の定量

概要

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The application of ICP-AES（Inductively Coupled Plasma-Atomic Emission Spectroscopy）for the rapid and very sensitive determination of zinc and copper in soils of paddy field was investigated. The metals in soils of about 1g were extracted with 100ml of 0.1M-HNO3 and ultra sonic cleaning machine. The extract solutions had been previously filtered through a 1μm Millipore filter. The values (y) obtained by the conventional ICP-AES method were found to be less than those (Ⅹ) obtained by flame AAS (Atomic Absorption Spectrometry), which is specified as the method of analysis for metals in solution, when the 0.1M-HNO3 digested sample solutions were aspirated without dilution. The relationships between x and y could be expressed by the following equation : y＝0.91Ⅹ-0.01 (γ＝0.998, n＝163) for Zn, y＝0.83Ⅹ-0.01 (γ＝0.997, n＝168）for Cu. This discrepancy in the analytical data obtained by the two methods seemed to be caused by physical interference such as the viscosity of the solutions.
横浜国立大学の論文