Determination of Imidacloprid in Vegetable Samples by Gas Chromatography–Mass Spectrometry

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Alberto Navalón, Antonio González-Casado, Rachid El-Khattabi, Jose Luis Vilchez and Amadeo R. Fernández-Alba


Abstract

A method for the determination of imidacloprid involving hydrolysis in basic medium followed by gas chromatography–mass spectrometry and selected ion monitoring was developed. The hydrolysis product which was extracted with chloroform was found to be suitable for gas chromatographic analysis. Further, clean-up is not necessary using the selected ion monitoring mode. [2H10]Anthracene was used as an internal standard. The applicable concentration range was 12.5–250.0 µg kg-1, the detection limit was 2.5 µg kg-1 (98 pg) and the relative standard deviation at the 125.0 µg kg-1 level was 0.7%. The method was applied to the determination of the imidaclorpid in vegetable samples (tomato, cucumber, pepper and green beans). Recovery levels were between 94.3% and 105.8%.


References

  1. C. De Liñan, Vademecum de Productos Fitosanitarios y Nutricionales, Embajadores, Madrid, 1995 Search PubMed.
  2. W. Leicht, Plfanzenschutz Nachr. Bayer, 1993, 4(3), 17 Search PubMed.
  3. C. Tomlin, The Pesticide Manual: a World Compendium, British Crop Protection Council, Croydon, 10th edn., 1994 Search PubMed.
  4. Code of Spanish Pesticide Residues Regulations, Real Decreto 280/94, B.O.E. No. 58, 1994 Search PubMed.
  5. F. J. Placke and E. Weber, Plfanzenschutz Nachr. Bayer, 1993, 46(64), 109 Search PubMed.
  6. A. R. Fernández-Alba, A. Valverde, A. Agüera, M. Contreras and A. Chiron, J. Chromatogr. A, 1996, 725, 93 CrossRef CAS.
  7. Statgraphics version 6.0, Manugistics and Statistical Graphics, Rockville, MD, USA, ( 1992) Search PubMed.
  8. J. L. Vilchez, R. El-Khattabi, J. Fernández, A. González-Casado and A. Navalón, J. Chromatogr. A, 1996, 746, 289 CrossRef CAS.
  9. Analytical Methods Committee, Analyst, 1994, 119, 2363 Search PubMed.
  10. A. González-Casado, L. Cuadros-Rodríguez, E. J. Alonso and J. L. Vilchez, J. Chromatogr. A, 1996, 726, 133 CrossRef.
  11. K. Doerffel, Fresenius' J. Anal. Chem., 1994, 348, 183 CrossRef CAS.
  12. Analytical Methods Committee, Analyst, 1995, 120, 29 Search PubMed.
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