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中文名称:钍矿石
英文名称:Thorium Ore订货以英文名称为准。
产品编号:IAEA-RGTh-1CAS:/
品牌:标准物质产地:进口
标准值:见证书分子式:/
规格 市场价(元) 折后价(元) 供货周期 数量 加入购物车 500g 0.00 0.00 3-4周 加入购物车
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产品详细介绍
IAEA-RGTh-1钍矿石Thorium Ore
Both, IAEA-RGU-1 and IAEA-RGTh-1 reference materials were prepared on behalf of the International Atomic Energy Agency by the Canada Centre for Mineral and Energy Technology by dilution of a uranium ore BL-5 (7.09% U) and a thorium ore OKA-2 (2.89% Th, 219 μg U/g) with floated silica powder of similar grain size distribution, respectively. No evidence for between-bottles inhomogeneity was detected after mixing and bottling. BL-5 has been certified for uranium, 226Ra and 210Pb confirming that it is in radioactive equilibrium. The agreement between radiometric and chemical measurements of thorium and uranium in OKA-2 shows both series to be in radioactive equilibrium.
Analyte Value Unit 95% C.I. N R/I/C 232Th 3250? Bq/kg 3160 - 3340 155 R 235U 3.6? Bq/kg 3.3 - 3.9 145 R 238U 78? Bq/kg 72 - 84 145 R 40K 6.3? Bq/kg 3.1 - 9.5 45 I K 200 mg/kg 100 - 300 45 I Th 800 mg/kg 784 - 816 155 R U 6.3 mg/kg 5.9 - 6.7 145 R (Value) Concentration calculated as a mean of the accepted laboratory means (N) Number of accepted laboratory means which are used to calculate the recommended or information values and their respective confidence intervals (R/I/C) Classification assigned to the property value for analyte (Recommended/Information/Certified) (?) Natural radionuclide activity concentrations derived from the elemental concentrations on basis of isotopic abundance and half-life data
The values listed above were established on the basis of a gravimetric dilution of materials with known uranium, thorium and potassium composition. The details concerning the criteria for qualification as a recommended or information value can be found in the respective report (attached).