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Negative Ion Mass Spectra of Organic Nitriles

Volume 35, Number 1 (Feb. 1981) Page 85-88

Bush, Kenneth L.; Parker, Carol E.; Harvan, Donald J.; Bursey, Maurice M.; Hass, J. Ronald

Negative ion mass spectra organic nitriles have been determined using 1 Torr of methane moderator/reagent gas in a chemical ionization source. The spectra contain abundant (M - 1) ions, and fragmentations are minimal. Ion/molecule reactions with residual oxygen, methane, and between sample molecules and ions form diverse products with low abundances relative to the (M - 1). Detection limits are comparable with positive ion methods, and for selected compounds, can be several orders of magnitude lower.