Chemical ionization in Fourier transform mass spectrometry

Fourier Transform Mass Spectrometry

“…Following the lead of Hunter and McIver (49), who showed the advantages of chemical ionization with ICR mass spectrometry, Ghaderi et al (50) conducted a systematic investigation of usual CI reagent gases and FTMS. The concept of reagentless CI or "self-Cl" was also introduced.…”

Use of a hand-portable gas chromatograph–toroidal ion trap mass spectrometer for self-chemical ionization identification of degradation products related to O-ethyl S-(2-diisopropylaminoethyl) methyl phosphonothiolate (VX)

“…The phenomenon of self-chemical ionization (self-CI) in mass spectrometers which employ ion storage was described by Ghaderi et al [8]. These researchers used an ion cyclotron resonance mass spectrometer and showed production of [M+H] + ions, with small relatively acidic fragments obtained from the precursor molecules serving as proton donors.…”

Hyphenated Techniques for Analysis of Complex Organic Mixtures

“…Table 1 [From (30), with permission of the copyright holder] this analysis. Because there was no difficulty in collecting both electron impact (EI) and methane chemical ionization (CI) mass spectra with the FTMS instrument (11,33) all three measurements, EI and CI mass spectra and FTIR spectra, were used in a complementary'fashion to make compound identifications. Therefore, in cases where there was no match between the infrared and mass spectral search lists and where closely related compounds appeared in each, the molecular weight obtained by CI was used to resolve ambiguities.…”