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Title: Method for selective detection of explosives in mass spectrometer or ion mobility spectrometer at parts-per-quadrillion level

A method for selective detection of volatile and non-volatile explosives in a mass spectrometer or ion mobility spectrometer at a parts-per-quadrillion level without preconcentration is disclosed. The method comprises the steps of ionizing a carrier gas with an ionization source to form reactant ions or reactant adduct ions comprising nitrate ions (NO.sub.3.sup.-); selectively reacting the reactant ions or reactant adduct ions with at least one volatile or non-volatile explosive analyte at a carrier gas pressure of at least about 100 Ton in a reaction region disposed between the ionization source and an ion detector, the reaction region having a length which provides a residence time (tr) for reactant ions therein of at least about 0.10 seconds, wherein the selective reaction yields product ions comprising reactant ions or reactant adduct ions that are selectively bound to the at least one explosive analyte when present therein; and detecting product ions with the ion detector to determine presence or absence of the at least one explosive analyte.
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Issue Date:
OSTI Identifier:
Battelle Memorial Institute (Richland, WA) ORO
Patent Number(s):
Application Number:
Contract Number:
Resource Relation:
Patent File Date: 2012 Apr 02
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
Country of Publication:
United States

Works referenced in this record:

Characterization of a distributed plasma ionization source (DPIS) for ion mobility spectrometry and mass spectrometry
journal, October 2008

Resolving interferences in negative mode ion mobility spectrometry using selective reactant ion chemistry
journal, April 2001