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Forced Volatilization Cleanup for Gas Chromatographic Assay of Pesticide Residues

  • F. A. Gunther
  • R. C. Blinn
  • D. E. Ott

Abstract

A major deterrent to the widespread routine application of gas chromatographic segregative techniques and selective detectors to qualitative and quantitative pesticide and other residue evaluation has been “poisoning” of volatilization chamber and column by extraneous extractives. This present note is prompted by the recent publication by STORHERR and WATTS (1) of their “sweep co-distillation” cleanup method, which is a version of our “forced volatilization” cleanup technique [OTT and Gunther (2)] as applied to butterfat. The final versions of our apparatus were best suited to cleanup of certain pesticides in butterfat, but the intermediate versions, described herein and in part by Gunther (3) were applicable with good recoveries to a variety of substrate extractives including the very intractable extractives mixture from alfalfa. All these devices physically separate gas chromatographable compounds from those compounds not gas chromatographable and provide a simple and versatile approach to the cleanup of stripping solutions to eliminate many extraneous extractives for almost any subsequent analytical operations.

Keywords

Glass Wool Substrate Extractive Cleanup Technique Major Deterrent Intermediate Version 
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.
    R. W. STORHERR and R. R. WATTS, J. Assoc. Official Agr. Chemists 48, 1154 (1965).Google Scholar
  2. 2.
    D. E. OTT and F. A. GUNTHER, J. Agr. Food Chem. 12, 239 (1964).CrossRefGoogle Scholar
  3. 3.
    F. A. GUNTHER, Adv. Pest Control Research 5, 191 (1962).Google Scholar
  4. 4.
    F. A. GUNTHER and R. C. BLINN, Analysis of Insecticides and Acaricides, pp. 231–233 (1955), Interscience, New York.Google Scholar
  5. 5.
    D. E. OTT and F. A. GUNTHER, Residue Reviews 10, 70 (1965).Google Scholar
  6. 6.
    F. A. GUNTHER, J. H. BARKLEY, R. C. BLINN, and D. E. OTT, S.R.I. Pesticide Research Bull. 2 (No. 2), 3 (1962). Paper No. 1682, University of California Citrus Research Center and Agricultural Experiment Station, Riverside, Calif.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1966

Authors and Affiliations

  • F. A. Gunther
    • 1
    • 2
  • R. C. Blinn
    • 1
    • 2
  • D. E. Ott
    • 1
    • 2
  1. 1.Department of EntomologyUniversity of California Citrus Research CenterRiversideUSA
  2. 2.Department of EntomologyAgricultural Experiment StationRiversideUSA

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