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| Utilization of Results for Interlaboratory Comparison Analysis of Natural Radionuclides in Uranium Geology Samples |
| WANG Tie-jian,GUO Dong-fa,LI Zhen-tao,ZHU Ming-yan,HUANG Qiu-hong,TAN Jing,XIE Sheng-kai,XIA Chen-guang,HU Xiao-hua |
| Analytical Laboratory Beijing Research Institute of Uranium Geology, Beijing 100029, China |
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Abstract Eight uranium geological samples named ALBRIUG-1～ALBRIUG-8 have been prepared using expired archive samples as raw material, through proportioning, grinding, particle size examination and homogeneity testing. Through interlaboratory comparison, it has been determined that the specific activities of gross α, gross β,238U,232Th, 226Ra ,210Po and 40K in uranium geology samples prepared by the laboratory using physical and chemical analytical methods. The homogeneity testing by ICP-MS with minimum sample weighing (50mg) shows that two samples named ALBRIUG-1 and ALBRIUG-8 are in homogeneity, in line with the requirements of reference materials, while the remaining six samples ALBRIUG-2～ALBRIUG-7 are not in homogeneity accordingly.The two samples can be used as quality control samples for analysis of natural radionuclides in uranium geology samples. The radionuclides in the sample ALBRIUG-2 to ALBRIUG-7 are basically in a state of equilibrium, the uranium-radium equilibrium coefficient are from 0.988 to 1.079. They may be used as quality control when using physical analysis with sampling volume larger than 150g.
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Received: 12 June 2015
Published: 19 April 2017
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2017, Vol. 38 
