title: Simultaneous analysis of grain and grain-based products for ethylene dibromide, carbon tetrachloride, and ethylene dichloride.
abstract: A method is described for the simultaneous measurement of parts per billion levels of the fumigants ethylene dibromide, carbon tetrachloride, and ethylene dichloride in grain and grain-based products. The fumigants are isolated by hexane co-distillation, separated by capillary gas chromatography, and detected with a mass spectrometer in the selected ion monitoring mode. Recoveries are greater than 90% and standard deviations are approximately 10% of the quantity measured. The method is free of interferences and its precision and accuracy are enhanced by the use of tetradeuterated ethylene dibromide and ethylene dichloride as internal standards.
mesh_terms: D002251:Carbon Tetrachloride / Q000032:analysis*; D002523:Edible Grain / Q000032:analysis*; D015946:Ethylene Dibromide / Q000032:analysis*; D005025:Ethylene Dichlorides / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D006842:Hydrocarbons, Brominated / Q000032:analysis*; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D014908:Triticum / Q000032:analysis
chemical_list: D005025:Ethylene Dichlorides; D006842:Hydrocarbons, Brominated; D006843:Hydrocarbons, Chlorinated; D015946:Ethylene Dibromide; C024565:ethylene dichloride; D002251:Carbon Tetrachloride