Isotopes

M+

(M+1)+

(M+2)+

B

Figure B-4 Mass Spectrum of Angiotensin I at Resolution

1,000

If isotopes cannot be resolved, the highest resolution you can obtain is limited by the width of the isotopic envelope. The isotopic envelope is the mass range of the combined isotopes, as measured at the half height of the tallest isotope peak in the compound (Figure B-5).

isotopic envelope

Figure B-5 Unresolved Isotopes

Data Explorer™ Software User’s Guide

B-5