base peak(redirected from base peak in a mass spectrum)
Also found in: Encyclopedia.
base peakThe ion in a mass spectrum with the highest measured abundance.
The relative abundance of the base peak ion is assigned a value of 100, and the abundances of all other ions plotted in that mass spectrum are normalised to that value. The y-axis in a mass spectrum is therefore given in terms of relative abundance.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.