## Abstract The technique of Hadamard transform was successfully coupled with GC/nonresonant multiphoton ionization/TOFMS, for the first time. 1,4βDichlorobenzene and the fourth harmonic generation (266βnm) of a Nd:YAG laser were employed as a model sample and an ionization laser, respectively. A H
Electron ionization time-of-flight mass spectrometry: Historical review and current applications
β Scribed by Nasrin Mirsaleh-Kohan, Wesley D.Robertson, and Robert N.Compton
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 817 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0277-7037
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β¦ Synopsis
This review presents an overview of electron ionization time-of-flight mass speclroscopy (EITOFMS), beginning with its early development to the employment of modem high-resolution electron ionization sources. The EITOFMS is demonstrated to be ideally suited for analytical and basic chemical physics studies. Studies of the formation of positive ions by electron ionization time-of-fiight mass speclroscopy have been responsible for many of the known ionization potentials of molecules and radicals, as well as accepted bond dissociation energies for ions and neutral molecules. Vie application of TOFMS has been particularly important in the area of negative ion physics and chemistry. A wide variety of negative ion properties have been discovered and studied by using these methods including: autodetachment lifetimes, metastab/e dissociation, Rydberg electron transfer reactions and field detachment, SFa Scavenger method for detecting temporary negative ion states, and many others.
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Matrix-assisted laser desorption/ionization (MALDI) mass spectra were obtained from single biological aerosol particles using an aerosol time-of-flight mass spectrometer (ATOFMS). The inlet to the ATOFMS was coupled with an evaporation/condensation flow cell that allowed the aerosol to be coated wit