relative error

https://doi.org/10.1351/goldbook.R05266
@E02194@ divided by the true value of the @M03789@. Since a true value cannot be determined, in practice the @C01316@ is used.
Source:
VIM [Terms] [Book]
See also:
PAC, 1994, 66, 595. (Nomenclature for the presentation of results of chemical analysis (IUPAC Recommendations 1994)) on page 601 [Terms] [Paper]