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standard samples
相关语句
  标准样品
    Standard samples preparation of long-lived nuclide ~(182)Hf for AMS
    用于加速器质谱测量的长寿命核素~(182)Hf标准样品的制备
短句来源
    41Ca in the biological samples and 41Ca standard samples were prepared to CaF2 with a more effective chemical separation and purification procedure. In the 41Ca AMS measurement, CaF3- negative ion was extracted from ion resource, 7+ charge state of particles was chosen after carbon foil stripping and accelerated at 8.5MV terminal voltage. 41Ca ions were finally recorded by an 140mbar P10 gas filled multi-anode ionization chamber detector.
    生物样品和41Ca标准样品经过化学分离和纯化,制备成CaF2作为靶物质,AMS测量41Ca时,离子源引出CaF3-负离子,膜剥离后的电荷态选择为7+态,加速器端电压选定为8.5MV,用充有140mbarP10气体的多阳极电离室探测41Ca.
短句来源
    For the uranium concentration above 100 g/L the accuracy of 0 22 % to 0 40 % is obtained and the difference between measured and chemical analysis results for standard samples of U 3O 8 is less than 0 10 %.
    用该装置对U3O8标准样品的分析结果与化学测量值间的相对偏差好于0.10%。
短句来源
    The absolute measured values of 4 standard samples with 41Ca/40Ca in the range of 1.785 × 10-8-1.750×10-10 were in good linear relationship with the standard values (r2 = 0.997). After normalized with the 1.785×10-841Ca/40Ca standard, the measured values of S2 and S4 standard samples were in good agreement with the nominal values, however, the measured value of S3 deviated the nominal value largely.
    对制备的4个标准样品(41Ca/40Ca在1.785×10-8-1.750×10-10范围)的测量结果显示41Ca/40Ca绝对测量值与标称值之间的线性关系良好(r2=0.997),经41Ca/40Ca为1.785×10-8的标准样品归一化后,S2,S4两个标样的测量值与标称值吻合较好,但标样S3的测量值与标称值有较大偏离.
短句来源
    The preparation of 182Hf standard samples for AMS measurement is presented.
    介绍了用于加速器质谱(AMS)测量的182Hf标准样品的研制过程。 主要包括四个步骤:1、放射性核素的人工合成;
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  “standard samples”译为未确定词的双语例句
    The tested uranium standard samples are consists of 24 pieces of 20 g sample,4 pieces of 40 g sample and 4 pieces of 80 g sample.
    测试了32个样品,其中,质量为20 g的样品24个、40 g样品4个及80 g样品4个。
短句来源
    The measured results show the excellent linear relationship between measured values and respective nominal values for ~(10)Be/~(9)Be standard samples.
    测量结果显示,n(10Be)/n(9Be)测量值与标称值呈良好线性关系,且归一化后的测量值与标称值吻合。
短句来源
    Moreover,normalized measured values are in good agreement with their nominal values. The prepared ~(10)Be/~(9)Be standard samples can be used for accurate AMS measurements of environmental ~(10)Be/~(9)Be.
    该系列标准可用于北京HI-13串列加速器的AMS系统对地质环境样品中10Be/9Be绝对比值的准确测定。
短句来源
    A kind of efficiency function of HPGe γ detector with respect to the point radioactive sources and the method of determining its parameters are brought forward. By means of the function and numerical method, 226Ra, 232Th and 40K in two standard samples are analyzed, and the results are coincident with the known parameters, so the applicability of the function and the method is proved.
    文章阐述了HPGeγ探测器对点源的探测效率函数及其参数的确定方法,并利用该函数,通过数值拟合方法,对两块已知样品中226Ra、232Th和40K三种放射性核素的放射性活度进行了分析,结果与已知数据吻合,证明了点源效率函数及其参数确定方法的实用性。
短句来源
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  standard samples
A method is developed for the separate determination of aluminum and beryllium using cellulose as the support; the method was used for the analysis of real samples and tested with standard samples.
      
IUPAC Recommendations for Reference Standard Samples in pH Measurements
      
Designing of Standard Samples for Determining the Sensitivity of Eddy-Current Devices to the Metal Inclusion Content in a Parama
      
The reasons of the wide propagation and the high effectiveness of using standard samples of magnetically soft materials are explained.
      
A numerical analysis of these errors is performed using standard samples as examples.
      
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Elastic recoil detection (ERD) method has been used to analyze the total amount of H in the adsorbent of dimethyl benzene. Atomic ratio of a Mylar film with known H amount is determined at first and the result is in agreement with the expectant values. Then, using a kapton film as a standard sample, we measured the total amount of H in the adsorbents manufactured under the different technical conditions. The results obtained might be helpful to practical usage.

本文介绍用弹性反冲分析技术分析了对二甲苯吸附剂中的氢含量。首先测定已知氢含量的Mylar膜的原子比,实验结果与预期值一致。实验中用Kapton膜作为标样,测定了各种工艺条件的吸附剂中的氢含量,为实际使用提供了依据。 本方法在E_0=2MeV下,可探测深度范围为0.5μm左右,深度分辨率约为700A,灵敏度为0.1%原子数。

Modei FMJ-81 RIA γ counter can be used for both measurement and calculation of the results from the assayed samples. The sample capacity is 250 Standard sample test tubes within 25 racks. The energy range of the instrument is such that the isotopes of current interest 125I, 131I, 113mIn, 99Tc, 51Cr and etc. can be counted. The detecting efficiency for 125I,the isotope with the greatest importance in RIA, is more than 76%, with the background less than 70 cpm. Corresponding safety measures have...

Modei FMJ-81 RIA γ counter can be used for both measurement and calculation of the results from the assayed samples. The sample capacity is 250 Standard sample test tubes within 25 racks. The energy range of the instrument is such that the isotopes of current interest 125I, 131I, 113mIn, 99Tc, 51Cr and etc. can be counted. The detecting efficiency for 125I,the isotope with the greatest importance in RIA, is more than 76%, with the background less than 70 cpm. Corresponding safety measures have been takea to prevent the sample test tubes, conveyer and drive motor from damage. The instrument can be connected with an MIC-80 microcomputer for real-time data processing. Some of the most widely used empirical curve fittings have been selected to calculate the unknown sample's concentration values. Program for automatically rejecting bad Standard curve points has been established. The microcomputer provides flexible calculation capacity and makes programming easy.

FMJ-81型放射免疫γ计数器可用于核医学中常用的125I、131I、113mIn、99Tc和51Cr等放射γ或X射线的同位素测量和数据处理。对放免分析最重要的同位素125I的测量效率大于76%,本底小于70cpm。为了保证样品试管、传动机械及马达等设备在任何故障条件下不受损伤,采取了相应的安全措施。仪器可与MIC-80型微型计算机联接进行数据实时处理。选取国内通用的RIA标准曲线拟合方程,用以计算未知样品浓度值。RIA标准曲线坏点自动剔除程序已编入数据处理系统,该微机的计算模式灵活可变,编制程序方便。

A set-up for measuring the Compton profile has been established. The Compton profiles of H2O (international standard sample for comparison), Al (three different thicknesses), LiF and Cu have been measured, using 59.54 KeV γ-rays from a 210 mCi 241Am source at 165° fixed scattering angle. Analyses and discussions are given.Our results for water are in agreement with published measurements of some foreign groups within an allowance of±1%. It is suggested that the method and results are reliable.

本文介绍我们最近建立的用γ散射方法获取康普顿轮廓(Compton profile)数据的实验装置及初步测量的结果.采用的放射源为~(241)Am(210mCi),散射角为165°测量了国际标准校核样品:水.测量结果与国外发表的结果在±1%之内相符合,达到国际相互校核的水平.还测量了Al(三种不同厚度)、LiF和Cu样品.对测量结果进行了分析和讨论.

 
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