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What is a Relative Abundance?

April 26, 2017Abundance relative

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What is a Relative Abundance?

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A relative abundance is the ratio of one mass peak profile’s area or height to that of another. When using Ion Composition Elucidation (ICE), the abundances considered are those of the +1 and +2 profiles relative to the profile of the ion containing none of the higher isotopes of elements such as 13C, 15N, 18O, or 34S. The figure below shows partial profiles for m/z 198 and its +1 and +2 profiles. The relative abundances were calculated as ratios of the sums of the areas used to plot the partial profiles x 100%. The partial profiles for two ions from perfluorokerosene, the ever-present calibrant, were used to calibrate the three exact masses also shown on the figure.