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'''Chemical ionization''' ('''CI''') is an ] technique used in ]. '''Chemical ionization''' ('''CI''') is an ] technique used in ].


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. This is a less energetic procedure than ] and the ions produced are, for example, protonated molecules (<sup>+</sup>). These ions are often relatively stable, tending not to fragment as readily as ions produced by ]. 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. This is a less energetic procedure than ] and the ions produced are, for example, protonated molecules: <sup>+</sup>. These ions are often relatively stable, tending not to fragment as readily as ions produced by ].

== External links ==

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== References ==

*Munson, M.S.B.; Field, F.H. ''J. Am. Chem. Soc.'' '''1966''', ''88'', 2621-2630. .

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Revision as of 03:30, 5 January 2006

Chemical ionization (CI) is an ionization technique used in mass spectrometry.

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. This is a less energetic procedure than electron ionization and the ions produced are, for example, protonated molecules: . These ions are often relatively stable, tending not to fragment as readily as ions produced by electron ionization.

External links

References

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