Recommended Lead-210 Values for Four CCRMP Uranium Reference Materials |
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| Authors: | HF STEGER CW SMITH |
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| Institution: | CANMET, Energy, Mines and Resources Canada, CCRMP, Chemical Laboratory, 555 Booth Street, Ottawa, Ontario, Canada K1A OG1 |
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| Abstract: | The Canadian Certified Reference Materials Project reports recommended values of lead-210 activity in four uranium reference materials previously certified for uranium and radium-226. Eleven laboratories participated in the interlaboratory program for DL-1a, BL-4a, DH-1a and BL-5; three measurement techniques were applied. Procedural and instrumental calibrations were performed with a certified lead solution from Amersham International Corp., thereby establishing traceability of the recommended values for lead-210. Activity ratios for uranium-238. radium-226 and lead-210 demonstrate these uranium reference materials to be in secular equilibrium, within experimental uncertainties. |
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