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Deuterium Ion Source for the Plasma Chromatograph/Mass Spectrometer Disclosure Number: IPCOM000060857D
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09

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Needham, CD [+details]


Ambiguities may exist in identifying the parent ion mass in a plasma chromatograph/mass spectrometer where proton donation or hydride abstraction is the mechanism for ion formation. Disclosed herein is a process which introduces a supply of heavy water into the flowing gas so that comparisons may be made to correctly determine the parent mass. The plasma chromatograph is highly sensitive, but its selectivity is rather poor. Organic vapors from the test sample are carried in a stream of nitrogen into a reaction zone where the neutral molecules undergo collision with the reactant ions formed from trace amounts of water in the carrier.