NDLI: Assessment of the determination of water-soluble ionic composition of atmospheric aerosols from the analysis of crossed halves of filters

Content Provider	Springer Nature Link
Author	Bettencourt da Silva, Ricardo J. N. Arias, Alejandro Oliveira, Cristina M. R. R. Camões, M. Filomena G. F. C.
Copyright Year	2012
Abstract	The water-soluble ionic composition of atmospheric aerosols is a key parameter for estimating its anthropogenic or natural origin. This evaluation depends on the reliability of the performed measurements. The differential approach for the evaluation of the measurement uncertainty was used for estimating, separately, the uncertainty associated with the extraction step, by difference from the observed intermediate precision and the combination of all the other uncertainty components affecting the estimated intermediate precision. The intermediate precision was estimated from the difference of results of the analysis, in different days, of several pairs of filters resulting from cross-changing of their halves. The precision associated with the symmetry of filters division, affecting the homogeneity of studied combined pairs of filters, was subtracted from the observed dispersion of results. The resulting detailed model of measurement performance allowed defining strategies for cost of analysis or magnitude of measurement uncertainty reduction. Measurements are fit for the analysis of urban aerosols since the expanded relative measurement uncertainty is smaller than a target value of 30 %.
Starting Page	147
Ending Page	157
Page Count	11
File Format	PDF
ISSN	09491775
Journal	Accreditation and Quality Assurance
Volume Number	17
Issue Number	2
e-ISSN	14320517
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-03-14
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Atmospheric aerosols Ionic composition Method validation Measurement uncertainty Crossed filter halves Ecotoxicology Biochemistry Food Science Analytical Chemistry Marketing Commercial Law
Content Type	Text
Resource Type	Article
Subject	Chemistry Instrumentation Chemical Engineering Safety, Risk, Reliability and Quality

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