Accession Number : ADD011010

Title :   Organophosphorus Selective Ion Mobility Spectrometer.

Descriptive Note : Patent Application,


Personal Author(s) : Wohltjen,H

Report Date : 17 Feb 1984

Pagination or Media Count : 25

Abstract : This abstract discloses an ion mobility spectrometer for analysis of a gaseous sample wherein only nitrogen and phosphorus containing molecules of the sample are ionized. The spectrometer is of the type having an ion source for ionizing the sample gas and a shutter for gating ions into a drift region, wherein an electric field gradient exists. The ion source includes a bead which comprises a thermally stable material, such as a ceramic or glass, having an alkali metal compound on its surface. The bead is immersed in a gaseous mixture of hydrogen and air, and is heated to a temperature of 200-1000 C. The bead selectively ionizes phosphorus and nitrogen containing molecules of the sample upon contact with the bead.

Descriptors :   *Patent applications, *Spectrometers, *Ions, *Organic phosphorus compounds, Ionization, Mobility, Gases, Nitrogen, Phosphorus, Ion sources, Shutters(Optics), Drift, Electric fields, Gradients, Beads, Ceramic materials, Glass, Alkali metal compounds, Hydrogen, Air, Mixtures, Heating

Subject Categories : Organic Chemistry
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE