atmospheric pressure chemical ionisation

atmospheric pressure chemical ionisation

A method of mass spectrometry ionisation in which an aerosolised sample is sprayed at atmospheric pressure into a heated region where a metal pin held at a high electric potential sustains a corona discharge. The solvent discharge creates reagent ions that react with neutral sample molecules, resulting in protonated ions which then pass through a sampling aperture into the spectrometer’s mass analyser.
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The instrument must be capable of electrospray and atmospheric pressure chemical ionisation analyses.
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