IUPAC Mass Spectrometry Nomenclature (NOT LISTED ON THE ASMS WEBSITE OF DEFINITIONS)
Analyzers
Mass Spectrograph - An instrument in which beams of ions are separated according to their mass-to-charge ratio, and in which the deflection and intensity of the beams are recorded directly on a photographic plate or film.
Single-Focusing Mass Spectrometer - An instrument in which ions with a given mass-to-charge ratio are brought to a focus although the initial directions of the ions diverge.
Nier-Johnson Geometry - An arrangement for a double-focusing mass spectrometer in which a deflection of p /2 radians in a radial electrostatic field analyzer is followed by a magnetic deflection of p /3 radians. The electrostatic analyzer uses a symmetrical object-image arrangement and the magnetic analyzer is used asymmetrically.
Mattauch-Herzog Geometry - An arrangement for a double-focusing mass spectrometer in which a deflection of p /4Ö 2 radians in a radial electrostatic field is followed by a magnetic deflection of p /2 radians. ......... ......... .........
IUPAC Mass Spectrometry Nomenclature
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