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中文名稱：愛爾蘭海水
英文名稱：Irish Sea Water (temp. out not available)訂貨以英文名稱為準。
產品編號：IAEA-443CAS：/
品牌：標準物質產地：進口
標準值：見證書分子式：/
規(guī)格 市場價(元) 折后價(元) 供貨周期 數(shù)量 加入購物車 5L 0.00 0.00 3-4周 加入購物車
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產品詳細介紹
IAEA-443愛爾蘭海水Irish Sea Water (temp. out not available)
In collaboration with IAEA-MEL, the Federal Maritime and Hydrographic Agency (BSH), Hamburg, Germany, collected about 3600 litres of surface water from the Irish Sea on-board Research Vessel Valdivia on September 7, 1993. Sampling was performed while cruising between two shallow (ca. 20 m water depth) stations located at 54°24,89' N - 3°33,62' W and 54°23,2'N - 3°33,45'W. Water was sampled from 5 m water depth, stored in 600 L containers and acidified to pH<1 immediately without prior filtration. A part of the sample was forwarded to IAEA-MEL and was used for the IAEA-381 interlaboratory comparison on anthropogenic and natural radionuclides. The results obtained from 28 laboratories were reported and the IAEA-381 certified reference material was issued.
In 2005, 1100 L of this sample, stored at the then Ris? National Laboratory, Denmark, were provided to IAEA-MEL. The sample was then transferred into a container of 1500 L and mixed for 4 hours using two pumps, aliquoted into 5 L cubitainers and coded as IAEA-443. All units were sterilized according to ISO standards at 25 kGy in an irradiation facility.
This certified reference material is intended to be used for quality assurance purposes in the determination of radionuclides in sea water samples, including development and validation of analytical procedures, preparation and testing of reference methods, quality control, and training of analysts. This material is not to be used as a calibrator.
Certified values for massic activities
Reference date for decay correction: 1 January, 2007
Radionuclide Certified value [Bq kg-1] Expanded uncertainty [Bq kg-1]* 3H 37.2 0.5 40K 11.4 0.4 90Sr 0.110 0.005 137Cs 0.36 0.01 234U 0.044 0.002 235U 0.00185 0.00010 238U 0.039 0.002 238Pu 0.0031 0.0001 239+240Pu 0.0147 0.0002 241Am** 0.0197 0.0010 *Estimated expanded uncertainty with a coverage factor k=2, corresponding to a level of confidence of approximately 95%, as defined in the Evaluation of measurement data - Guide to the expression of uncertainty in measurement JCGM100:2008.
**The values should be corrected for in-growth from 241Pu.
Information values for massic activitiesReference date for decay correction: 1 January, 2007
Radionuclide Information value [mBq kg-1] Combined expanded uncertainty [mBq kg-1] 230Th 0.5 0.1 232Th 0.19 0.03 239Pu 8.2 0.8 240Pu 7.0 0.6 241Pu 161 19 The assigned values were established on the basis of results reported to the IAEA Environment Laboratories in Monaco by laboratories which had participated in an interlaboratory comparison (ILC). The details concerning the criteria for qualification as certified or information value may be found in the report IAEA/AQ/10 (attached).
