| Chemical Ionization |
Article Index for Chemical |
Website Links For Chemical |
Information AboutChemical Ionization |
| CATEGORIES ABOUT CHEMICAL IONIZATION | |
| ion source | |
|
Ionization of sample (analyte) is achieved by interaction of its molecules with reagent ions. The analyte is ionized by chemical ion-molecule reactions during collisions in the source. The process may involve transfer of an electron, a proton or other charged species between the reactants. This is a less energetic procedure than . HOW IT WORKS Typical reagent gases such as Methane , Isobutane , or Ammonia are present in a millionfold excess with respect to the analyte. The analyte is ionized by ion-molecule Chemical Reaction s during collisions in the Ion Source . Some Chemical Reaction s of Methane reagent gas are shown below: Primary Ion Formation: : Secondary Reagent Ions: : : Product Ion Formation: : (protonation) : ( abstraction) : (adduct formation) : (charge exchange) Chemical ionization in an atmospheric pressure electric discharge is called Atmospheric Pressure Chemical Ionization . EXTERNAL LINKS
REFERENCES |
|
|