A Modified Hydrogen Flame-Ionization Detector, Highly Sensitive and Selective for Phosphates

  • R. V. Hoffman


Microcoulometric and electron capture detectors have been routinely used for many years in pesticide residue analysis. With the microcoulometric systems one is capable of detecting halogens, sulfur, and phosphorus with high specificity but with somewhat low sensitivity, while with the electron capture detector one can detect compounds containing strong electronegative groups with high sensitivity but with low specificity. While in most cases the electron capture mode of detection is relatively sensitive to most organic phosphate pesticides, its lack of selectivity tends to limit the usefulness of this detector. It was fortunate that a detector was developed for these organophosphate pesticides. This detector was the sodium thermionic detector.


Detector Response Electron Capture Detector Ionization Efficiency Methyl Parathion Organophosphate Pesticide 
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Copyright information

© Plenum Press 1967

Authors and Affiliations

  • R. V. Hoffman
    • 1
  1. 1.Food and Drug AdministrationBuffaloUSA

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