Chemical ionization of laser-desorbed neutrals in a Fourier-transform mass spectrometer
β Scribed by Amster, I. Jonathan.; Land, Donald P.; Hemminger, John C.; McIver, Robert T.
- Book ID
- 126429905
- Publisher
- American Chemical Society
- Year
- 1989
- Tongue
- English
- Weight
- 381 KB
- Volume
- 61
- Category
- Article
- ISSN
- 0003-2700
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Laser-induced acoustic desorption (LIAD) of neutral molecules coupled with electron and chemical ionization was examined as an analysis method for nonvolatile organic and biomolecules in Fourier-transform ion cyclotron resonance (FT-ICR) mass spectrometry. LIAD involved the production of a high ampl
## Abstract Ionization energies (IE) of [M + __z__H]^__z__+^ (__z__+) electrosprayβproduced polypeptides were determined by electron ionization in a Penning cell of 4.7 and 9.4 T Fourier transform mass spectrometers. For __z__ = 1+ and substance P, the found IE value of 11.0 Β± 0.4 eV is in agreemen