George A. Keenan

The utility of ultra‐performance liquid chromatography/electrospray ionisation time‐of‐flight mass spectrometry for multi‐residue determination of pesticides in strawberry

Michael J. Taylor, George A. Keenan, Kirsty B. Reid et al. · Rapid Communications in Mass Spectrometry · 2008 · 54 citations

Engineering, Pesticide-residue Analysis, Agricultural Economics +17

Near-threshold electron impact ionisation of helium

George A. Keenan, Isobel C. Walker, Donald F. Dance · Journal of Physics B Atomic and Molecular Physics · 1982 · 37 citations

Engineering, Physics, Electron Spectroscopy +9

A novel spectrometer, incorporating an electric sector and quadrupole mass filter, for studying dissociations of ions

F.M. Harris, George A. Keenan, P. D. Bolton et al. · International Journal of Mass Spectrometry and Ion Processes · 1984 · 30 citations

Quadrupole Mass Filter, Electric Sector, Physics +12

The dependence of double-ionization energies of diatomic neutral species on the atomic ionization energies

M. Rabrenović, F.M. Harris, George A. Keenan et al. · Chemical Physics Letters · 1983 · 16 citations

Engineering, Physics, Diatomic Neutral Species +12

Photoionisation and photodissociation of laser-vaporised metallotetraphenylporphyrins

Anita C. Jones, Michael J. Dale, George A. Keenan et al. · Chemical Physics Letters · 1994 · 12 citations

Photochromism, Photochemistry, Laser Photochemistry +5