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中文名稱：鈾釷礦成分分析標(biāo)準(zhǔn)物質(zhì)
英文名稱：Uranium-Thorium Ore訂貨以英文名稱為準(zhǔn)。
產(chǎn)品編號(hào)：DL-1aCAS：/
品牌：CCRMP產(chǎn)地：加拿大
標(biāo)準(zhǔn)值：見(jiàn)證書分子式：/
規(guī)格 市場(chǎng)價(jià)(元) 折后價(jià)(元) 供貨周期 數(shù)量 加入購(gòu)物車 200g 0.00 0.00 3-4周 加入購(gòu)物車
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產(chǎn)品詳細(xì)介紹
DL-1a鈾釷礦成分分析標(biāo)準(zhǔn)物質(zhì)Uranium-Thorium Ore
Certified Values and 95% Confidence Intervals
Constituent wt %
U 0.0116 ± 0.0003
Th 0.0076 ± 0.0004
Ra-226 1.40 ± 0.04 Bq g-1
Pb-210 1.40 ± 0.02 Bq g-1
Description
DL-1a is intended as a replacement for DL-1 of which the stock is exhausted. It is waste rock typical of the property of Denison Mines Limited in Elliot Lake, Ontario, and is a pale yellow arkose sandstone containing uraninite and brannerite and possibly traces of monazite and uranothorite. The bulk material was dry-ground to minus 74 μm, blended, sampled systematically for analysis by optical fluorimetric and chemical methods to demonstrate homogeneity suitable for use as a reference material, and bottled in 200-g units. Evidence is available that DL-1a is in secular equilibrium.
Certification
The consensus value for uranium is the unweighted mean of 286 accepted analytical determinations by 20 laboratories. Methods included titrimetry, colorimetry, fluorimetry, X-ray fluorescence, neutron activation analysis and radiochemistry.
The consensus value for thorium is the unweighted mean of 187 accepted analytical determinations by 14 laboratories. Methods included colorimetry, X-ray fluorescence, neutron activation analysis, radiometry and isotope dilution- mass spectrometry .
Non-certified constituents
The concentration of the following constituents are given for information only.
Value
Fe 0.93%
S 0.41%
Instruction for use
The recommended values for DL-1a pertain to an "as is" basis.
Legal notice
The Canadian Certified Reference Materials Project has prepared this reference material and statistically evaluated the analytical data for the interlaboratory certification program to the best of its ability. The Purchaser by receipt hereof releases and indemnifies the Canadian Certified Reference Materials Project from and against all liability and costs arising out of the use of this material and information.
Reference
The preparation and certification procedures used for DL-1a are given in CANMET Reports 80-10 "DL-1a: A Certified Uranium -Thorium Reference Ore", 83-9E "Radium-226 in Certified Uranium References Ores DL-1a, BL-4a, DH-1a and BL-5" and 84-11E "Lead-210 in Certified Uranium Reference Ores DL-1a, BL-4a, DH-1a and BL-5" which are available free of charge on application to:
