-
- 全部產(chǎn)品分類
- 標(biāo)準(zhǔn)物質(zhì)
中國(guó)標(biāo)準(zhǔn)物質(zhì) 美國(guó)NIST 歐洲IRMM/ERM 歐洲BCR 英國(guó)MBH 德國(guó)SUS 美國(guó)BS LGC標(biāo)準(zhǔn)物質(zhì) 美國(guó)USGS標(biāo)準(zhǔn)物質(zhì) 國(guó)立環(huán)境標(biāo)準(zhǔn)物質(zhì) IAEA標(biāo)準(zhǔn)物質(zhì) 加拿大礦產(chǎn)科學(xué)室(CCRMP) 日本JSAC標(biāo)準(zhǔn)物質(zhì) 日本GSJ地質(zhì)標(biāo)準(zhǔn)物質(zhì) 美國(guó)ERA標(biāo)準(zhǔn)物質(zhì)
- 藥典及其雜質(zhì)對(duì)照品
- 標(biāo)準(zhǔn)品
- 培養(yǎng)基
- 化學(xué)試劑
- 菌種及細(xì)胞
- 血清
- 試劑盒
- 氣相色譜
- 液相色譜
- 樣品前處理
- 實(shí)驗(yàn)室耗材
- 色譜進(jìn)樣瓶
- 實(shí)驗(yàn)室安全防護(hù)產(chǎn)品
- 電化學(xué)
- 實(shí)驗(yàn)室儀器設(shè)備
-
- 您現(xiàn)在的位置：首頁(yè) >> 產(chǎn)品中心 >> 標(biāo)準(zhǔn)物質(zhì) >> IAEA標(biāo)準(zhǔn)物質(zhì)IAEA標(biāo)準(zhǔn)物質(zhì)
-
-
中文名稱：土壤
英文名稱：Soil Inorganic Mineral訂貨以英文名稱為準(zhǔn)。
產(chǎn)品編號(hào)：IAEA-444CAS：/
品牌：標(biāo)準(zhǔn)物質(zhì)產(chǎn)地：進(jìn)口
標(biāo)準(zhǔn)值：見(jiàn)證書(shū)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
-
產(chǎn)品詳細(xì)介紹
IAEA-444土壤Soil Inorganic Mineral
A soil from China was used to prepare the IAEA-444 soil certified reference material spiked with gamma emitting radionuclides. Before using the soil for spiking, it was milled and sieved to collect the appropriate fraction at mesh size less than 0.3 mm, and then homogenized. The matrix of Chinese soil was characterized and a number of samples were pre-screened for the radionuclides of interest prior to spiking. The results have shown that the material is free from artificial radionuclides, except for Cs-137, which was present at 2.6±0.2 Bq kg-1 based on dry mass. (Ref. date: 2006-01-01). The moisture content was found to be 2.3±0.2 %.
The preparation of the spiked soil CRM was performed according to a validated procedure [1]. In total, 400 bottles of 200 grams each were prepared. After bottling the material was sterilized by gamma ray irradiation with a total dose of 25 kGy using a Co-60 source according to EN ISO 13485:2003 to ensure long-term stability of the material by inhibiting microbial action.
Reference date for decay correction: 2007-10-15
Analyte Certified value1,2 [Bq kg-1] Uncertainty* [Bq kg-1] 54Mn 61.0 1.3 60Co 82.6 2.0 65Zn 29.9 1.0 109Cd 248.7 5.2 134Cs 59.4 1.7 137Cs 68.5 1.4 210Pb3 48.0 1.6 241Am 55.6 1.6 1Established based on the certified activity value of the standard solutions used for spiking
The reference values of the massic activities of each nuclide and their associated standard uncertainties were established based on the certified activity value of the standard solutions used for spiking the soil, taking into account the successive dilution steps, the mass of spiking solutions and the dry mass of the soil being spiked.
2The certified values of massic activities are traceable to the SI through the radioactivity standard solutions used for spiking
3Information value
*Uncertainty is expressed as a Mixture model median based standard deviation S (MM-median) at 95 % confidence levelThe information property value of 210Pb was established based on a consensus value derived from measurement results of 10 test portions measured using a broad energy type Ge detector. The obtained consensus value from measurement results was comparable to the median (48.9 ± 1.7) calculated from 172 measurement results reported in the IAEA-CU-03-2007 world wide proficiency test [2]. This information value of 210Pb massic activity should not be used for calibration purposes and it could only be used for quality control purposes.
