Estimation of uncertainty in the determination of nitrogen oxides emissions

This paper presents a methodology for estimation of uncertainty on a reference test method for the determination of nitrogen oxides concentration in gaseous emissions from stationary sources. As a first stage for identification of uncertainty sources, the test method is carefully reviewed in detail....

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Bibliographic Details
Published inAccreditation and quality assurance Vol. 11; no. 3; pp. 138 - 145
Main Authors Gomes, Joao F. P., Cruz, Vitor M. A., Ribeiro, Maria L. C.
Format Journal Article
LanguageEnglish
Published Heidelberg Springer Nature B.V 01.05.2006
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Summary:This paper presents a methodology for estimation of uncertainty on a reference test method for the determination of nitrogen oxides concentration in gaseous emissions from stationary sources. As a first stage for identification of uncertainty sources, the test method is carefully reviewed in detail. Afterwards, these sources are quantified, bearing in mind its partial uncertainty, allowing the determination of the combined uncertainty and, finally, the expanded uncertainty. The calculation procedure was implemented into an excel calculation file. Using this file and considering several numerical applications from real situations, uncertainities around 15 mg/Nm3 over determined concentrations of 350 mg/Nm3 of NOx (expressed as NO2) were obtained.
ISSN:0949-1775
1432-0517
DOI:10.1007/s00769-006-0132-x