Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.

Issue 15, 2019
Previous Article Next Article

Why do we need the uncertainty factor?


The uncertainty factor is a new way to express measurement uncertainty. It is especially applicable when the uncertainty is large (e.g., expanded relative uncertainty > 20%), which occurs in some analytical methods, and also when the uncertainty includes that arising from the primary sampling of highly heterogeneous materials. The upper and lower confidence limits of the uncertainty interval are calculated by multiplying and dividing the measurement result by the uncertainty factor, rather than adding and subtracting the traditional uncertainty value.

Graphical abstract: Why do we need the uncertainty factor?

Back to tab navigation

Article information

15 Mar 2019
15 Mar 2019
First published
27 Mar 2019

Anal. Methods, 2019,11, 2105-2107
Article type
AMC Technical Brief

Why do we need the uncertainty factor?

Analytical Methods Committee AMCTB No. 88, Anal. Methods, 2019, 11, 2105
DOI: 10.1039/C9AY90050K

Social activity

Search articles by author