Recovery of 1,3-, 2,3-dichloropropenes, 1,2-dibromo-3-chloropropane, and o-, p-dichlorobenzenes from fatty and non-fat foodstuffs by liquid extraction technique.
Food samples including fatty, non-fatty, grain-based, and nongrain-based types were fortified with the following five nematocides and fumigants: 1,3-dichloropropene, 2,3-dichloropropene, 1,2-dibromo-3-chloropropane, o-dichlorobenzene, and p-dichlorobenzene. Then, depending on sample consistency and type, the samples were diluted in, or extracted with organic solvent such as isooctane. A few of the high-fat extracts were passed through Florisil to remove excess fat or endogenous interferences. Analysis of the initial or cleaned up extracts was done by gas chromatography (GC) at 90 degrees C. The dichloropropenes were determined on 20% OV-101 columns with electron-capture and Hall electroconductivity detectors. The dichlorobenzenes and 1,2-dibromo-3-chloropropane, which elute beyond 30 min on the above columns, were determined on 5%-loaded columns using the same detectors. All five analytes were recovered from these techniques. Mean analyte recovery following a direct dilution or extraction was 83%, and following the Florisil cleanup step, was 52%. In 1986, a fumigant survey of about 200 foodstuffs by using this overall technique gave no findings of the five compounds studied here.
Daft
J L
JL
U.S. Department of Health and Human Services, Food and Drug Administration, Kansas City, Missouri 64106.
D000498:Allyl Compounds / Q000032:analysis*; D002722:Chlorobenzenes / Q000032:analysis*; D004041:Dietary Fats / Q000032:analysis*; D005504:Food Analysis; D005506:Food Contamination; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides; D011407:Propane / Q000031:analogs & derivatives* / Q000032:analysis
D000498:Allyl Compounds; D002722:Chlorobenzenes; D004041:Dietary Fats; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides; C004726:2-dichlorobenzene; C007318:1,2-dibromo-3-chloropropane; C023891:1,3-dichloro-1-propene; C018511:4-dichlorobenzene; D011407:Propane