著者

中島 篤之助 高橋 正雄 森下 益孝

出版者

一般社団法人 日本原子力学会

雑誌

日本原子力学会誌 (ISSN:00047120)

巻号頁・発行日

vol.3, no.2, pp.104-109, 1961

被引用文献数

2

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Two procedures are described for the sensitive spectrographic determination of 0.023 ppm of boron in graphite for nuclear reactor. In the first method, preliminary concentration is carried out by the removal of the graphite by ashing in the presence of La₂O₃. Then the contents of boron in La₂O₃ are determined by the carrier-distillation method. In the second method, the sample in the form of powder is compressed into pellets with the aid of a phenol-formaldehyde resin as binding medium, and these are arced at 7 A (d.c.). By means of display microphotometry, the peak height of B at 2497.73 Å is compared with that of the NO(γ) band component at 2497.14 Å.