Skip to main content

Determination of paraquat residues in food crops by gas chromatography

Summary

A method is described for determining paraquat residues in lettuce, carrots and onions. The procedure is based on the extraction of the sample with 5N H2SO4 and catalytic hydrogenation of the acid extract. This is followed by column cleanup on alumina and subsequent determination by gas chromatography. Recoveries of paraquat added to lettuce, carrots and onion at 0.5, 0.1, and 0.05 ppm were between 75 to 86%, with maximum standard error of 4%. The lower limit of this method is in the 0.05 ppm range.

This is a preview of subscription content, access via your institution.

References

  1. ASHTON, F.M., and A.S. CRAFTS: “Mode of Action of Herbicides”, John Wiley & Sons, New York, 1973, pp 185–199.

    Google Scholar 

  2. CALDERBANK, A., and S.H. YUEN: Analyst (London)90, 99 (1965).

    Google Scholar 

  3. COATS, G.E., H.H. FUNDERBURK, J.M. LAWRENCE, and D.E. DAVIS: Proc. 18th Southern Weed Control Conf., p 164 (1965).

  4. CORWIN, A.H., R.R. ARELLANO, and A.B. CHIVVIS: Biochim. Biophys. Acta162, 533 (1968).

    PubMed  Google Scholar 

  5. DAMANAKIS, M., D.S.H. DRENNAN, J.D. FRYER, and K. HOLLY: Weed Res.10, 278 (1970).

    Google Scholar 

  6. KHAN, S.U.: J. Agr. Food Chem.,22, 863 (1974).

    Google Scholar 

  7. SODERQUIST, C.J., and D.G. CROSBY: Bull. Environ. Contain. Toxicol.8, 363 (1972).

    Google Scholar 

Download references

Author information

Affiliations

Authors

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Khan, S.U. Determination of paraquat residues in food crops by gas chromatography. Bull. Environ. Contam. Toxicol. 14, 745–749 (1975). https://doi.org/10.1007/BF01685252

Download citation

Keywords

  • Hydrogenation
  • Alumina
  • Chromatography
  • Waste Water
  • Standard Error