Selective Reagents for Chemical Ionization Mass Spectrometry
In chemical ionization mass spectrometry1 (CIMS) a set of reagent ions is generated by bombarding a suitable gas at a pressure of ca. 1 torr with high energy electrons (300-1000eV). Sample molecules are introduced in the usual manner and are ionized by ion-molecule reactions with the reagent ions. Because the sample concentration in the ion source is always maintained at less than 1% that of the reagent gas, ionization of sample molecules by electron impact is not observed.
KeywordsNitric Oxide Schiff Base Deuterium Oxide Organic Functional Group Tertiary Alcohol
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- 1.For recent reviews see: (a) F. H. Field, “Ion-Molecule Reactions”, J. L. Franklin, Ed., Plenum Press, New York (1972) pp. 261–312, (b) F. H. Field, “MEP International Review of Science, Physical Chemistry, Series One” Vol. 5, A. Macooll, Ed., Buttersworth (1972) pp. 133182, (c) M. S. B. Munson, Anal. Chem., 43, 28A (1971)Google Scholar
- 6.a) D. F. Hunt, C. N. McEwen, and R. A. Upham, Tetra-hedron Lett, 4539(1971);Google Scholar
- 9.D. Beggs, Abstracts of Papers, Twentieth Annual Conference on Mass Spectrometry and Allied Topics, Dallas, Texas, June 1972, Paper No. N4Google Scholar
- 10.D. F. Hunt and C. N. McEwen, unpublished resultsGoogle Scholar
- 11.A. M. Hogg and T. L. Nagabhushan, Abstracts of Papers, Twentieth Annual Conference on Mass Spectrometry and Allied Topics, Dallas, Texas, June 1972, Paper No. P2Google Scholar
- 12.D. F. Hunt and J. F. Ryan, J. C. S. Chem Comm. 620 (1972)Google Scholar