イオン交換樹脂を直接加熱する原子吸光分析の試み

概要

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For the determination of trace metal elements by atomic absorption spectrometry, the direct heating and atomization of the metal-adsorbed ion-exchange resin has been attempted. The ion-exchange resin (Wg) is put into the sample solution (Vl) of the metal ion concentration C, and the system is brought to equilibrium. Then, w g of resin is taken out, dried, and mounted on the carbon furnace atomizer. The absorbance due to the metal is theoretically proportional to VwC/W. Two peaks appear on the absorbance chart. The first peak (P_1) appears in the "Ashing" period, and the second peak (P_2) appears in the "Atomizing" period. Since the mean value of intensity ratio P_2/P_1 of the H-type resin was 0.33, the absorbance of the metal is estimated to be (P_2-0.33P_1)/ P_1, assuming that the resin amount w is proportional to P_1. Although the analytical results by this method have low precision, it is possible to analyze a copper solution of a very low concentration such as 0.05 ppb.
社団法人日本分析化学会の論文
1979-05-05