Analysis of triallate residues in cereals and soil by gas chromatography with ion-trap detection.
Triallate residues in barley seedlings and soil samples were determined by gas chromatography with ion-trap detection. Soil was extracted with methanol on a mechanical shaker, and plants were extracted with acetonitrile in a Sorvall homogenizer. After evaporation of the organic solvents, the residue was dissolved in hexane, and plants extracts were cleaned-up on an alumina column. Gas chromatographic analysis was carried out using a BP-1 fused-silica capillary column with helium as carrier gas. To quantitate residues the total-ion chromatogram was obtained and then the selected-ion monitoring chromatograms were displayed at m/z 86 for triallate and at m/z 154 for the internal standard, methyl-(4-amino-2-chloro)-benzoate. The average recovery through the method from barley and soil samples was always higher than 80%. The limit of detection in the selected-ion mode was 0.01 mg/kg. Barley and soil samples treated with triallate were also analysed. A good agreement was observed between results obtained by this method and by gas chromatography with nitrogen-phosphorus detection.
Sanchez-Brunete
C
C
Departamento de Proteccion Vegetal CIT-INIA, Madrid, Spain.
Salto
T
T
Garcia-Baudin
J M
JM
Tadeo
J L
JL
D002849:Chromatography, Gas; D002523:Edible Grain / Q000032:analysis*; D001467:Hordeum / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis*; D012015:Reference Standards; D012989:Soil Pollutants / Q000032:analysis*; D014214:Triallate / Q000032:analysis*
D010573:Pesticide Residues; D012989:Soil Pollutants; D014214:Triallate