Editing Chemical ionization (section)

== Applications ==
[[File:NOAA PAN CIMS.jpg|thumb|250px|Peroxynitrate chemical ionization mass spectrometer at the US [[National Oceanic and Atmospheric Administration]]]]
CI mass spectrometry is a useful tool in structure elucidation of organic compounds.<ref name=":2" /> This is possible with CI, because formation of [M+1]<sup>+</sup> eliminates a stable molecule, which can be used to guess the functional groups present.<ref name=":2" /> Besides that, CI facilitates the ability to detect the molecular ion peak, due to less extensive fragmentation.<ref name=":2" /> Chemical ionization can also be used to identify and quantify an analyte present in a sample, by coupling chromatographic separation techniques to CI<ref name=":2" /> such as [[Gas chromatography|gas chromatography (GC)]], [[High-performance liquid chromatography|high performance liquid chromatography (HPLC)]] and [[Capillary electrophoresis|capillary electrophoresis (CE)]]. This allows selective ionization of an analyte from a mixture of compounds, where accurate and precised results can be obtained.