Enhanced supercritical fluid carbon dioxide extraction of pesticides from foods using pelletized diatomaceous earth.
Supercritical fluid carbon dioxide (SC-CO2), when used with an extraction enhancer, comprises a supercritical fluid extraction (SFE) system for extraction of pesticides and matrix components from fatty and nonfatty foods. After being mixed with the enhancer, samples ranging from 95% water to pure lipophilic oils can be extracted efficiently with SC-CO2. This extraction technique yields analyte recoveries in excess of 85% for over 30 types of pesticides at incurred levels ranging from 0.005 to 2 ppm in such diverse matrixes as carrots, lettuce, peanut butter, hamburger, and fortified butter fat and fortified potatoes. SC-CO2 provides a solvent medium that is nontoxic, nonflammable, and inexpensive while also eliminating the use and disposal of potentially carcinogenic organic solvents.
Food and Drug Administration, Total Diet Research Center, Kansas City, MO 64106.
M L
ML
Hopper
J W
JW
King
D002079:Butter / Q000032:analysis; D002245:Carbon Dioxide; D007692:Diatomaceous Earth; D005504:Food Analysis / Q000379:methods*; D008055:Lipids / Q000032:analysis; D008460:Meat / Q000032:analysis; D010575:Pesticides / Q000032:analysis*; D014867:Water
D008055:Lipids; D010575:Pesticides; D014867:Water; D002245:Carbon Dioxide; D007692:Diatomaceous Earth; D002079:Butter