Molecular Ion
Definition
An ion formed from a molecule without changing its atom composition; common positive EI gives M+•.
Related terms
- Base Peak
- The most intense peak in the spectrum. By convention it is set to 100 percent relative abundance; every other peak is reported...
- M/z
- Mass-to-charge coordinate; the numerical ionic mass in unified atomic mass units divided by its charge number.
- Mass Accuracy
- Agreement between a measured mass-related value and the appropriate reference.
- MS/MS
- Tandem mass spectrometry using successive stages of mass-related selection or analysis with an intervening process such as fragmentation.
- Resolving Power
- m/Δm under a specified definition of peak width or separation.