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Atmospheric Pressure Chemical Ionisation (APCI)

A complementary atmospheric-pressure source that vaporises the LC eluent and uses a corona discharge to ionise a reagent gas, which transfers charge to less polar analytes that ESI does not ionise efficiently. Steroids, fat-soluble vitamins and most pesticides sit in the APCI sweet spot.

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Related terms

Electrospray ionisation (ESI)GC-MS interfaceHyphenated techniqueHyphenationICP plasmaInterfaceInternal standard / deuterated standardIsotope Ratio Mass Spectrometry (IRMS)Jet separatorMRM (multiple reaction monitoring)Vapour-phase IR spectrum

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