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.
Hopper
M L
ML
Food and Drug Administration, Total Diet Research Center, Kansas City, MO 64106.
King
J W
JW
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