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Published July 1, 1990 | public
Journal Article

Application of reversal electron attachment for ultrasensitive detection of thermal electron-attaching molecules: CCI_4 and C_6H_5NO_2

Abstract

A standard gas dilution method was used to determine the selective response of the reversal electron attachment detector (READ) to carbon tetrachloride concentrations In nitrogen. Data are provided that determine the lowest concentration of sample detectable with the present instrumental configuration as being below 1.0 pptrv (part per trillion by volume). The Incorporation of a 90˚ electrostatic deflector with the quadrupole mass spectrometer is shown to be vital, and with it, negative-ion quadrupole mass spectrometry is used to characterize the ionization process. Observations are also made of the reversal electron attachment response to nitrobenzene. The analytical potential of reversal electron capture negative-ion mass spectrometry is examined, and areas for future development are discussed.

Additional Information

© 1990 American Chemical Society. Received for review March 5, 1990. Accepted March 5, 1990. This work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, and was supported by the Department of Transportation through agreement with the National Aeronautics and Space Administration. We thank T. Tombrello (Caltech), J. Hobbs (U.S. Department of Transportation) and O. Orient (JPL) for helpful discussions.

Additional details

Created:
August 19, 2023
Modified:
October 18, 2023