A mass spectrometer is provided herein and is configured to have two ionization sources, in which a first ionization source, such as MALDI, ESI and the like, which is capable of providing in addition to ions a set of normally intractable desorbed neutrals that are ionized by a second EI source coupled with the first source.
CROSS-REFERENCE TO RELATED APPLICATION
This application claims priority to U.S. Provisional Application No. 60/396,693, filed Jul. 18, 2002, the contents of which are fully incorporated herein by reference.
