Recent advances in cleanup of fats by sweep co-distillation. Part 1: Organochlorine residues.
A redesigned fractionation tube has resulted in development of a new, commercial sweep co-distillation unit. It is compact, reliable, cost-efficient, and permits cleanup of pesticides in up to 10 fat samples simultaneously. Recovery of several organochlorine residues (HCB, alpha-BHC, lindane, heptachlor epoxide, dieldrin, p,p'-DDE, p,p'-DDD, p,p'-DDT) at ppm and ppb levels in meat (beef) fat are 83-105%, with coefficients of variation between 4 and 6%. Cleaned up extracts are quantitated by gas chromatography using an electron capture detector with a vitreous silica capillary column containing a medium polarity bonded phase.
D000818:Animals; D002417:Cattle; D002849:Chromatography, Gas / Q000295:instrumentation / Q000379:methods; D004041:Dietary Fats / Q000032:analysis*; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides / Q000032:analysis*; D008460:Meat; D010573:Pesticide Residues / Q000032:analysis*
D004041:Dietary Fats; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides; D010573:Pesticide Residues