chemical ionisation

chemical ionisation

A process of ionisation involving the reaction of a reagent ion and a neutral molecule to yield a charged ionic form of the molecule.
The first step in chemical ionisation is the creation of the reagent ion by electronically ionising reagent gas molecules, which are present in great excess. A stable population of reagent ions is formed through ion–molecule reactions, which eventually react with the neutral gas-phase molecules. In a common example, methane gas is ionised to form predominantly CH5, which then reacts with the neutral sample molecule in a process of protonation to form MH.
References in periodicals archive ?
X-rays can be tuned to atomic spectroscopic levels, such as those used in the absorption spectroscopic method to investigate specific chemical ionisation states and local atomic environment in complex materials, including electrochemical applications and substances under high pressure.
Contract notice for Supply of High-Resolution Time-of-Flight Mass Spectrometer with Atmospheric Pressure Sampling Inlet and Flow-Tube Chemical Ionisation Source
Subject of this procurement is a high-resolution time-of using chemical ionisation (high-resolution time-of-flight mass spectrometer chemical ionization, HRToF-CIMS).
Capabilities such as MS/MS, Chemical Ionisation, Field Ionisation or the ability to perform GCxGC-MS are considered highly desirable.

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