Evaluation of measurement uncertainty for analytical procedures using a linear calibration function

被引：24

作者：

Brüggemann, L ^{[1
]}

Wenrich, R ^{[1
]}

机构：

[1] UFZ Helmholtz Ctr Environm Res, Dept Analyt Chem, D-04319 Leipzig, Germany

来源：

ACCREDITATION AND QUALITY ASSURANCE | 2002年 / 7卷 / 07期

关键词：

measurement uncertainty; linear calibration; method validation;

D O I：

10.1007/s00769-002-0485-8

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In the EURACHEM/CITAC draft "Quantifying uncertainty in analytical measurement" estimations of measurement uncertainty in analytical results for linear calibration are given. In this work these estimations are compared, i.e. the uncertainty deduced from repeated observations of the sample vs. the uncertainty deduced from the standard residual deviation of the regression. As a result of this study it is shown that an uncertainty estimation based on repeated observations can give more realistic values if the condition of variance homogeneity is not correctly fulfilled in the calibration range. The complete calculation of measurement uncertainty including assessment of trueness is represented by an example concerning the determination of zinc in sediment samples using ICP-atomic emission spectrometry.

引用

页码：269 / 273

页数：5

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