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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 4, Number 1
February 20, 1957 

Th-determination in Rare Earth. Part Ⅱ Th-determination by the Sebacic Acid Method

희토류중 토리움의 분리정량에 관하여 (제2보) 세바신산에 의한 토리움의 분리정량
Han Suk Choi, Soon Za Pack

최한석, 박순자
Th-determination by the sebacic acid method was compared with the hydrogen peroxide method. The former is a little more complicated than the latter in the operation and at the same time it requires careful pH adjustment, but the time needed for determination could be decreased greatly by the former. As a result of the comparison between both methods we confirmed that, within ±0.08 % of error, when ThO2 was contained 5 % in the sample, we could use the sebacic acid method with an half time of that required for the hydrogen peroxide method. Thorium in Monazite sand was also determined by both methods and compared. In the case we found, too, that if we permitted the maximum error of ±0.08 %, we could prefer the sebacic acid method.
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