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Estimation of the uncertainty of the measurement results of some trace levels elements in document paper samples using ICP-MS

机译：使用ICP-MS估计文献纸样品中一些痕量级别元素的测量结果的不确定性

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摘要

The measurement uncertainty characterizes the dispersion of the quantity values being attributed to the measurand and there are different approaches for uncertainty estimation. This study illustrates the application of the GUM (bottom-up) approach to estimate the measurement results uncertainty for the quantitative determination of Al, Ba, Fe, Mg, Mn, Pb, Sr and Zn from document paper samples using ICPMS. The measurement uncertainty estimation was done based on identifying, quantifying and combining all the associated sources of uncertainty separately. Certain typical steps were followed: specifying the measurand; identifying the major sources of uncertainty; quantifying the uncertainty components; combining the significant uncertainty components; determining the extended combined standard uncertainty; reviewing the estimates and reporting the measurement uncertainty. For the eight mentioned trace elements the combined standard uncertainties and the expanded uncertainties were determined. The relative measurement uncertainty values lay between 7.7% and 13.6%. In all the five paper samples for each of the eight elements homogenous uncertainty values were obtained. In order to emphasize the uncertainty sources contributions, the percent contribution of the uncertainty components to the combined relative standard uncertainty were graphically represented for the elements determined by ICP-MS in paper samples. The previously validated method proved to be suitable for the intended purpose and when the uncertainty of the measurement results is estimated, it becomes a significant tool for characterizing the elemental composition of the document paper samples. Moreover, the applied approach for the uncertainty estimation enables improving the data quality and decision making.
机译：测量不确定度表征了归因于测量的量值的分散，并且存在不同的不确定性估计方法。本研究说明了Gum（自下而上）方法的应用来估计使用ICPM的文献纸样品从文献纸样品中定量测定Al，Ba，Fe，Mg，Mn，Pb，Sr和Zn的测量结果不确定性。基于识别，量化和组合所有相关的不确定性来单独的不确定性来完成测量不确定性估计。遵循某些典型步骤：指定尺寸;确定不确定性的主要来源;量化不确定性组件;结合了重要的不确定性组件;确定延长的组合标准不确定性;审查估计数并报告测量不确定性。对于八个提到的微量元素，确定了合并的标准不确定性和扩展的不确定性。相对测量不确定性值介于7.7％和13.6％之间。在所有八种元素中的每一个的五个纸样品中获得了均匀的不确定性值。为了强调不确定性来源贡献，将不确定性组分对组合相对标准不确定性的贡献百分比以图形方式表示由ICP-MS在纸样品中确定的元素。先前验证的方法证明适用于预期目的，并且当估计测量结果的不确定性时，它成为表征文件纸样品的元素组成的重要工具。此外，不确定性估计的应用方法可以提高数据质量和决策。

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  • 来源
    《RSC Advances》 |2015年第15期|共13页
  • 作者

    Tanase Ion Gh.; Popa Dana Elena; Udristioiu Gabriela Elena; Bunaciu Andrei A.; Aboul-Enein Hassan Y.;

  • 作者单位

    Univ Bucharest Fac Chem Dept Analyt Chem Bucharest 050663 5 Romania;

    Univ Bucharest Fac Chem Dept Analyt Chem Bucharest 050663 5 Romania;

    Univ Bucharest Fac Chem Dept Analyt Chem Bucharest 050663 5 Romania;

    SCIENT CROMATEC PLUS SRL Res Ctr Instrumental Anal Bucharest 060114 6 Romania;

    Natl Res Ctr Pharmaceut &

    Drug Ind Res Div Pharmaceut &

    Med Chem Dept Cairo 12311 Egypt;

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  • 正文语种 eng
  • 中图分类 化学;
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