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

  • R. V. Hoffman

Abstract

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.

Keywords

Detector Response Electron Capture Detector Ionization Efficiency Methyl Parathion Organophosphate Pesticide 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    L. Giuffrida, “A Flame Ionization Detector Highly Selective and Sensitive to Phosphorus—A Sodium Thermionic Detector,” J. Assoc. Off. Agr. Chem. 47:293, 1964.Google Scholar
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    A Karmen, Anal. Chem. 36:1416, 1964.CrossRefGoogle Scholar
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    L. Giuffrida and N.F. Ives, J. Assoc. Off. Agr. Chem. 47:1112, 1964.Google Scholar
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    L. Giuffrida, N.F. Ives, and D.C. Bostwick, J. Assoc. Off. Anal. Chem. 49:8, 1966.Google Scholar
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    J.C. Sternberg, W.S. Gallaway, and T. L. Jones, “The Mechanism of Response of Flame Ionization Detectors,” in: Gas Chromatography, Third International Symposium, Academic Press, New York, 1962.Google Scholar

Copyright information

© Plenum Press 1967

Authors and Affiliations

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

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