X射线荧光光谱测定地质样品中27种组分分析结果不确定度的评估

doi:10.3964/j.issn.1000-0593(2014)04-1118-06

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Abstract Evaluating uncertainty of analytical results with 165 geological samples by polarized dispersive X-ray fluorescence spectrometry (P-EDXRF) has been reported according to the internationally accepted guidelines. One hundred sixty five pressed pellets of similar matrix geological samples with reliable values were analyzed by P-EDXRF. These samples were divided into several different concentration sections in the concentration ranges of every component. The relative uncertainties caused by precision and accuracy of 27 components were evaluated respectively. For one element in one concentration, the relative uncertainty caused by precision can be calculated according to the average value of relative standard deviation with different concentration level in one concentration section, n=6 stands for the 6 results of one concentration level. The relative uncertainty caused by accuracy in one concentration section can be evaluated by the relative standard deviation of relative deviation with different concentration level in one concentration section. According to the error propagation theory, combining the precision uncertainty and the accuracy uncertainty into a global uncertainty, this global uncertainty acted as method uncertainty. This model of evaluating uncertainty can solve a series of difficult questions in the process of evaluating uncertainty, such as uncertainties caused by complex matrix of geological samples, calibration procedure, standard samples, unknown samples, matrix correction, overlap correction, sample preparation, instrument condition and mathematics model. The uncertainty of analytical results in this method can act as the uncertainty of the results of the similar matrix unknown sample in one concentration section. This evaluation model is a basic statistical method owning the practical application value, which can provide a strong base for the building of model of the following uncertainty evaluation function. However, this model used a lot of samples which cannot simply be applied to other types of samples with different matrix samples. The number of samples is too large to adapt to other types samples. We will strive for using this study as a basis to establish a reasonable basis of mathematical statistics function mode to be applied to different types of samples.

Key words：Uncertainty;Geological samples;P-EDXRF

Received: 2013-06-14 Accepted: 2013-10-15

ZTFLH:

O657.3

Corresponding Authors: WANG Yi-ya E-mail: yiyawang@163.com

Cite this article:

WANG Yi-ya,ZHAN Xiu-chun. The Uncertainty Evaluation of Analytical Results of 27 Elements in Geological Samples by X-Ray Fluorescence Spectrometry[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(04): 1118-1123.

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https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2014)04-1118-06 OR https://www.gpxygpfx.com/EN/Y2014/V34/I04/1118

[1] ZANG Mu-wen, KE Rui-hua(臧慕文，柯瑞华). Component Analysis in Mathematical Statistics and Uncertainty Evaluation Summary(成分分析中的数理统计及不确定度评定概要). Beijing: China Quality Press(北京：中国质检出版社)，2012. 45.
[2] REN Chun-sheng，ZHANG Ai-zhen，YING Hai-song，et al(任春生，张爱珍，应海松，等). Metal Mine(金属矿山)，2008，379(1)：76.
[3] LI Yu-wu，MA Li(李玉武，马莉). Rock and Mineral Analysis(岩矿测试)，2007，26(3)：219.
[4] CHEN Ai-ping，WANG Ye，WANG Su-ming(陈爱平，王烨，王苏明). Rock and Mineral Analysis(岩矿测试)，2006，25(3)：270.
[5] HU Zheng-yang，XING Hua-bao，SHI Hou-yi，et al(胡正阳，邢华宝，史厚义，等). Metallurgical Analysis(冶金分析)，2005，25(1)：82.
[6] JIN De-long，WANG Cheng-zhong，LU Xiao-ming，et al(金德龙，王承忠，陆晓明，等). Metallurgical Analysis(冶金分析)，2005，25(3)：88.
[7] Sieber J R，Yu L L，Marlow A F，et al. X-Ray Spectrometry，2005，34：153.
[8] JI Ang，TAO Guang-yi，ZHUO Shang-jun，et al(吉昂，陶光仪，卓尚军，等). X-Ray Fluorescence Spectrometry Analysis(X射线荧光光谱分析). Beijing：Science Press(北京：科学出版社)，2003. 218.
[9] JI Ang，ZHUO Shang-jun，LI Guo-hui(吉昂，卓尚军，李国会). Energy Dispersive X Ray Fluorescence Spectrometry(能量色散X射线荧光光谱). Beijing：Science Press(北京：科学出版社)，2011. 297.
[10] Rousseau R M. The Rigaku Journal，2001，18(2)：33.
[11] Wegrzynek D，Markowicz A，Chinea-Cano E. X-Ray Spectrom.，2003，32：317.
[12] Rashmi，Dhawan U，Suri D K. X-Ray Spectrom.，1999，28：157.
[13] China National Accreditation Board for Laboratories(中国实验室国家认可委员会). Accreditation Criteria for Testing and Calibration Laboratories(ISO/IEC 17025—2005)(检测和校准实验室认可准则)，2005. 13.