P1: LLL/LLL P2: FJU Final Pages
Encyclopedia of Physical Science and Technology EN002C-80 May 25, 2001 20:18
impact
electron
(b)
methane,
in
ionization
chemical
Negative-ion methane.
(a) in ionization
disaccharide.
a chemical
of
spectra positive-ion
Mass (c)
12 and
FIGURE ionization,