Mass analysed ion kinetic energy

A) MASS-ANALYSED ION KINETIC ENERGY SPECTROMETRY (MIKES)... 

Mass-analysed ion kinetic energy spectrometry (MIKES) A form of MS-MS product-ion scan that may be carried out on a reversed-geometry double-focusing mass spectrometer. 

MIKES Mass-analysed ion kinetic energy spectrometry... 

Identification of the different types of ions observed in a mass spectrum through peak-matching and metastable ion analysis allows the determination of molecular structure. Several newer mass spectrometric techniques Mass analysed ion kinetic energy (MIKE) or reversed Nier-Johnson geometry) can also be used in spectral interpretation. These techniques are described in specialised monographs. 

Mass analysed ion kinetic energy (MIKE) is the simplest observation method for metastable or collision-induced ions. It requires an instrument with a reverse BE geometry. 

MIKES Mass-analysed Ion Kinetic Energy Spectrometry CAR Collision-Activated Reaction... 

Gas-phase acid-base studies are usually performed by using one of the following techniques high-pressure mass spectrometry (HPMS), chemical ionization mass spectroscopy (CIMS) with mass-analysed ion kinetic energy spectroscopy/collision induced dissociation (MIKES/CID), flowing afterglow (FA) or ion cyclotron resonance (ICR) spectrometry. For a brief description of all methods, Reference 8 should be consulted. 

A similar technique applicable to reverse geometry mass spectrometers (magnetic sector before electrostatic analyser) is that of mass-analysed ion kinetic energy spectrometry (MIKES). In this technique the ion to be studied is isolated by the magnet and induced to fragment by collision activation in a small chamber filled with a gas such as helium. The product ions are then detected by scanning the electrostatic analyser voltage. 

Larger ionized cycloalkylamines show reactions involving DIs which represent extension of the chemistry of their acyclic counterparts. Thus, metastable ionized cyclohexy-lamine and ionized 2-methylcyclopentylamine undergo the same fragmentations, as is shown by the identical mass-analysed ion kinetic energy spectra of... 

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