Abstract

The value of isotope labeling in probing the chemistry underlying mass spectra is well established. The usefulness of this approach and the reliability of conclusions reached thereby can be greatly increased by checking dependence of label retentions in fragment ions on operating conditions. For example, varying the ionizing voltage, source temperature, or repeller potential alters the relative contributions of the two competing processes by which methylcyclopentane loses a methyl radical to form isomeric C₅H₉⁺ ions. The ions resulting from the two processes are derived from different parts of the original molecule and so can be distinguished by appropriate labeling.

Chemical ionization Fourier transform mass spectrometry of chemical warfare agent simulants using laser-produced metal ions

Chih-Cong Chou and S. Randolph Long
Appl. Opt. 29(33) 4981-4986 (1990)

Detection of neutral and ionic reaction mechanisms in molecular clusters

Jhobe Steadman, Eric W. Fournier, and Jack A. Syage
Appl. Opt. 29(33) 4962-4968 (1990)

Photoionization Analysis by Mass Spectroscopy

G. L. Weissler, J. A. R. Samson, M. Ogawa, and G. R. Cook
J. Opt. Soc. Am. 49(4) 338-349 (1959)

Probing argon–benzene van der Waals molecules and isotopically substituted benzene with laser-ionization mass spectrometry

Kevin G. Owens and James P. Reilly
J. Opt. Soc. Am. B 2(9) 1589-1593 (1985)

Measurement of the isotope selectivity of the strontium magneto-optical trap by a time-of-flight mass spectrometer

Kwang-Hoon Ko, You-Kyoung Lim, Do-Young Jeong, Hyunmin Park, Taek-Soo Kim, Gwon Lim, and Hyung Ki Cha
J. Opt. Soc. Am. B 23(12) 2465-2469 (2006)