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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 37, Number 11
JKCSEZ 37(11)
October 20, 1993 

 
Title
A Study on the Neutron Activation Analysis of Noble Metals in the Ancient Coin

고전(古錢)내 귀금속 원소의 중성자 방사화 분석에 관한 연구
Author
Kwon Soo Chun, Chul Lee, Myung-Zoon Czae, Jong Du Lee, Koo Soon Chung

전권수, 이철, 채명준, 이종두, 정구순
Keywords
Abstract
옛 동전(銅錢)에 존재하는 이리듐, 금과 은 등 귀금속 원소들을 정량하기 위한 연구를 수행하였다. 192Ir, 198Au 및 110mAg의 방사능 세기를 계측할 때, 반감기가 긴 핵종에서 방출된 큰 감마선 에너지에 의한 간섭을 감소시키기 위하여 용매추출, 이온교환 크로마토그래피 등 방사화학 분리를 적용하였다. 그 결과 이리듐을 10-11 g/g양까지 정량할 수 있었고, 또한 Currie의 방법으로 계산한 3종류의 검출한계, 즉 임계, 검출, 정량한계를 향상시킬 수 있었다. 이리듐의 회수율을 결정하기 위하여 담체를 첨가하여 방사화학 분리를 한 후 중성자를 제조사하였다. 5개의 동전 중의 Ir, Au 및 Ag에 대한 평균 회수율은 각각 65.3%, 98.5%, 99.5%이었다.

The determination of noble metals such as Ir, Au and Ag in the ancient coins has been studied. For the measurement of the activity of 192Ir, 198Au and 110mAg, radiochemical separations including solvent extraction and ion-exchange chromatography were applied to reduce the interference of high energy γ-ray emitted from various radionuclides with long half-life. As a results, 10-11 g/g level of Ir could be detected and it was found that the three kinds of the detection limits, i.e., critical, detection, quantitative limit, calculated by the method proposed by Currie, were enhanced. Prior to the re-irradiation with neutron, inactive carrier was added in order to determine the recovery yield of Ir in the radiochemical separation. The average recovery yields of Ir, Au and Ag in the 5 coins were 65.3%, 98.5%, 99.5%, respectively.

Page
961 - 966
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