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Fresenius' Journal of Analytical Chemistry

, Volume 371, Issue 2, pp 182–189 | Cite as

Determination of imidacloprid, metalaxyl, myclobutanil, propham, and thiabendazole in fruits and vegetables by liquid chromatography–atmospheric pressure chemical ionization–mass spectrometry

  • Ximo Pous
  • Mª Ruíz
  • Yolanda Picó
  • Guillermina Font
Special Issue Paper

Abstract.

Imidacloprid, metalaxyl, myclobutanil, propham, and thiabendazole have been simultaneously determined in strawberries, oranges, potatoes, pears, and melons by matrix solid-phase dispersion (MSPD) followed by liquid chromatography–atmospheric pressure chemical ionization–mass spectrometry (LC–APCI–MS) in positive-ion mode. The samples were homogenized with C8 bonded silica as MSPD sorbent, placed in a glass column, and eluted with dichloromethane. Chromatographic separation of the compounds was achieved on a reversed-phase LC column using a methanol–ammonium formate (50 mmol L–1) gradient as a mobile phase. Samples were screened by monitoring the protonated molecular ion at m/z 256 for imidacloprid, 280 for metalaxyl, 289 for myclobutanil, and 202 for thiabendazole, and the main fragment at m/z 138 for propham. Positive samples were confirmed by multiple-ion monitoring. The repeatability (<20%) and recovery (>57%) of the method were good, and limits of detection (<0.05 mg kg–1) were adequate.

Keywords

Melon Imidacloprid Ammonium Formate Metalaxyl Thiabendazole 
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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Copyright information

© Springer-Verlag 2001

Authors and Affiliations

  • Ximo Pous
    • 1
  • Mª Ruíz
    • 1
  • Yolanda Picó
    • 1
  • Guillermina Font
    • 1
  1. 1.Laboratori de Bromatologia i Toxicologia, Facultat de Farmàcia, Universitat de València, Av. Vicent Andrés Estellés s/n 46100 Burjassot, València, SpainSpain

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