Lock mass
A reference compound infused continuously so calibration drift can be corrected in real time. Its absence limits mass accuracy to the last external calibration.
Related terms
- Mass accuracy
- Difference between measured and theoretical mass, in ppm of the theoretical value. A relative measure — the same ppm is a different absolute error at different masses.
see also ppm · Rule AX-R01
Where this term appears
The glossary exists to make record pages readable without a chemistry degree. Every technical term on a report resolves here.
- Assay report records — the term appears in result tables, peak tables and provenance blocks
- Method references — where the measurement behind the term is defined
- All 9 glossary terms beginning with L