Estimation of uncertainty in electrochemical amperometric measurement of dissolved oxygen concentration

被引：12

作者：

Jalukse, L ^{[1
]}

Leito, I ^{[1
]}

Mashirin, A ^{[1
]}

Tenno, T ^{[1
]}

机构：

[1] Univ Tartu, Dept Chem, EE-51014 Tartu, Estonia

来源：

ACCREDITATION AND QUALITY ASSURANCE | 2004年 / 9卷 / 06期

关键词：

measurement uncertainty; uncertainty budget; dissolved oxygen; galvanic sensor;

D O I：

10.1007/s00769-004-0783-4

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A procedure for the estimation of measurement uncertainty of dissolved oxygen (DO) concentration measurement based on the ISO approach is presented. It is based on a mathematical model that involves 14 input parameters. The uncertainty of DO concentration strongly depends on changes in experimental details (temperature difference between calibration and measurement, the time interval between calibration and measurement, etc.). The relative measurement uncertainty is, however, practically independent of the DO concentration itself. The uncertainty is the lowest if the calibration and the measurement are done at the same temperature and on the same day. A calculation tool is provided (in the form of a GUM Workbench file) for practitioners that can be used for uncertainty calculation of DO concentrations at very different experimental conditions.

引用

页码：340 / 348

页数：9

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