Fate of iprovalicarb, indoxacarb, and boscalid residues in grapes and wine by GC-ITMS analysis

J Agric Food Chem. 2011 Jun 22;59(12):6806-12. doi: 10.1021/jf2011672. Epub 2011 May 25.

Abstract

The behavior in field and the transfer from grapes to wine during winemaking of iprovalicarb, indoxacarb, and boscalid was studied. The residue levels found in grapes were far below the MRLs set for grapes in EU, accounting at harvest time 0.81, 0.43, and 4.23 mg/kg for iprovalicarb, indoxacarb, and boscalid, respectively. The residue levels in the samples treated with boscalid may have residual problems (due to an accumulation effect) if repeated field treatments will be performed. Winemaking experiments showed a complete transfer of all pesticide from grapes to the must, while in wine the residues were low or negligible due to the adsorbing effect of lees and pomace. The clarification experiments showed a good removal of pesticide residues from the wine media, for all pesticides. The GC-ITMS method showed good performance with adequate recoveries ranging from 75 to 115%, and good method limits of quantitation (LOQs) and of determination (LODs) far below MRLs.

Publication types

  • Evaluation Study

MeSH terms

  • Biphenyl Compounds / analysis*
  • Carbamates / analysis*
  • Food Contamination / analysis
  • Gas Chromatography-Mass Spectrometry / methods*
  • Niacinamide / analogs & derivatives*
  • Niacinamide / analysis
  • Oxazines / analysis*
  • Pesticide Residues / analysis*
  • Valine / analogs & derivatives*
  • Valine / analysis
  • Vitis / chemistry*
  • Wine / analysis*

Substances

  • Biphenyl Compounds
  • Carbamates
  • Oxazines
  • Pesticide Residues
  • Niacinamide
  • 2-chloro-N-(4-chlorobiphenyl-2-yl)nicotinamide
  • indoxacarb
  • iprovalicarb
  • Valine