植物体(茶)に含まれる砒素の放射化分析
1972 年 19 巻 2 号 p. 91-95
詳細
1972 年 19 巻 2 号 p. 91-95
The content of As in tea plant was determined by neutron activation analysis.
1) The content of As could not be determined by non-destructive activation analysis, using Ge (Li) γ-ray spectrometer, because γ-ray peak of 76As on the spectrogram is masked by γ-ray peak of 82Br which exists in tea and has very similar γ-ray spectrum.
2) After destruction of tea plant with acid, Br in tea plant was distilled off from the acid destructed solution and γ-ray peak of 76As was evidenced on γ-ray spectrogram of the acid destructed solution.
From the height of γ-ray peak of 76As the contents of more than 0.2μg of As in tea plant were determined quantatively.
3) By using the Gutzeit method, As in tea plant was separated from other elements and two characteristic γ-ray peak of 76As were figured on the γ-ray spectrogram.
From this spectrograms, more 0.05μg of As in tea plant were detected quantitatively.
