These reference materials, from the two principal uranium-producing regions of Canada, were prepared to replace the previous reference materials of the Canadian Uranium Producers' Analytical Subcommittee. The materials from the Beaverlodge area of northwestern Saskatchewan, are relatively free of thorium, are in secular equilibrium, and cover a range of concentrations that should make them useful as reference materials for radiometric methods of analysis. A copy of CANMET Report 77-64, "Radioactive ores DH-1, DL-1, BL-1, BL-2, BL-3 and BL-4: Certified reference materials", will be provided with each order. |
