Application of porous carbon for solid-phase extraction of dicarboxyimide fungicide residues from wines in combination with high-resolution capillary gas chromatography and gas chromatography-mass spectrometry

J Chromatogr A. 1996 Nov 22;754(1-2):445-54. doi: 10.1016/s0021-9673(96)00326-3.

Abstract

Solid-phase extraction with a novel porous carbon sorbent CARB GR was used for the clean-up step of dicarboxyimide fungicides residues from variety of Slovak grape wines with subsequent capillary gas chromatography-flame ionization detection, -electron-capture detection (ECD) and -mass spectrometry-ion-trap detection (MS-ITD) analysis. Recovery was tested at various concentration levels of vinclozolin and iprodione in standard solutions (R = 80-97%, R.S.D. < or = 5). The value of recovery in spiked wines is dependent on concentration level (studied in the range of 5.9 micrograms/1-1.96 mg/l) and on the variety of wine (R = 80-96%; R.S.D. = 3-5%). Limits of quantitation (for sample volume 50 ml) were determined to be with GC-ECD for both fungicides in ppt range and with GC-MS-ITD in the multiple ion detection mode monitoring in ptt range for vinclozolin and ppb range for iprodione. Concentration levels of vinclozolin residues were determined in treated wines (with 0.1% Ronilan 50 WP) as well as iprodione residues (with 0.15% Rovral 50 WP) and a strong dependence on the protective term before the harvest is shown.

Publication types

  • Comparative Study

MeSH terms

  • Aminoimidazole Carboxamide / analogs & derivatives
  • Aminoimidazole Carboxamide / analysis
  • Aminoimidazole Carboxamide / isolation & purification
  • Carbon / chemistry*
  • Chromatography, Gas / methods*
  • Fungicides, Industrial / analysis*
  • Fungicides, Industrial / isolation & purification
  • Gas Chromatography-Mass Spectrometry
  • Hydantoins*
  • Osmolar Concentration
  • Oxazoles / analysis
  • Oxazoles / isolation & purification
  • Pesticide Residues / analysis*
  • Pesticide Residues / isolation & purification
  • Reproducibility of Results
  • Wine / analysis*
  • Wine / classification

Substances

  • Fungicides, Industrial
  • Hydantoins
  • Oxazoles
  • Pesticide Residues
  • Aminoimidazole Carboxamide
  • Carbon
  • vinclozolin
  • iprodione