mass accuracy

https://doi.org/10.1351/goldbook.09406
Measured mass minus reference value for that mass.
Note: In practice, mass accuracy is expressed as a fractional error.
Source:
PAC, 2020, 92, 1781. (Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)) on page 1840 [Terms] [Paper]