Control of the reactant ion chemistry for the analysis of explosives by ion mobility spectroscopy

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Description

Changes in the reactant ion composition in the ion mobility spectrometer (IMS) can result in a change in the ionization processes occurring in the ionization region, ultimately leading to an altered instrumental response for the analyte, and exacerbating the problem of qualitative and quantitative analysis. Some species are very susceptible to changes in reactant ions, while other species are relatively unaffected. These types of behavior are observed for two common explosives, namely, hexahydro-1,3,5-trinitrol,3,5-triazine (RDX) and 1,3,5-trinitrotoluene (TNT), respectively. To control the reactant ion composition, and hence the gas phase chemistry, it is necessary to control the composition of gases present ... continued below

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19 p.

Creation Information

Rodacy, P.J. & Ingersoll, D. July 1, 1995.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Changes in the reactant ion composition in the ion mobility spectrometer (IMS) can result in a change in the ionization processes occurring in the ionization region, ultimately leading to an altered instrumental response for the analyte, and exacerbating the problem of qualitative and quantitative analysis. Some species are very susceptible to changes in reactant ions, while other species are relatively unaffected. These types of behavior are observed for two common explosives, namely, hexahydro-1,3,5-trinitrol,3,5-triazine (RDX) and 1,3,5-trinitrotoluene (TNT), respectively. To control the reactant ion composition, and hence the gas phase chemistry, it is necessary to control the composition of gases present in the ionization region of the IMS. A series of modifications are described for the PCP Phemto-Chem 100 IMS that afford the requisite control. The effectiveness of these modifications for analysis of RDX and TNT are described and contrasted with that observed for the unmodified system.

Physical Description

19 p.

Notes

OSTI as DE95014533

Source

  • Other Information: PBD: Jul 1995

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  • Other: DE95014533
  • Report No.: SAND--95-1126
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/93458 | External Link
  • Office of Scientific & Technical Information Report Number: 93458
  • Archival Resource Key: ark:/67531/metadc793302

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • July 1, 1995

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

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  • June 27, 2016, 12:41 p.m.

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Rodacy, P.J. & Ingersoll, D. Control of the reactant ion chemistry for the analysis of explosives by ion mobility spectroscopy, report, July 1, 1995; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc793302/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.