title: Cleanup with two Florisil columns for gas chromatographic determination of multiple pyrethroid insecticides in products of animal origin.
abstract: A gas chromatographic method was developed for the simultaneous determination of 9 pyrethroid insecticides in products of animal origin. The multiresidues of the pyrethroids in different samples were extracted with acetone-petroleum ether (1 + 1), and extracts were cleaned up on a Florisil partition column and a Florisil adsorption column. Four animal tissue samples were examined at 0.05-0.25 ppm fortification levels. The average recoveries of all insecticides were 76.9-88.0%, and the coefficients of variation were < 4.6% for all insecticides except permethrin. The detection limits of the method were ca 5 ppb for all insecticides but permethrin, which had a detection limit of ca 10 ppb.
authors: Qinhuangdao Import and Export Commodity Inspection Bureau, Qinhuangdao, Hebei, People's Republic of China, P.C.
authors: G F
authors: GF
authors: Pang
authors: T S
authors: TS
authors: Zhao
authors: Y Z
authors: YZ
authors: Chao
authors: C L
authors: CL
authors: Fan
mesh_terms: D000818:Animals; D002417:Cattle; D002645:Chickens; D002849:Chromatography, Gas / Q000379:methods*; D017633:Magnesium Silicates; D008460:Meat / Q000032:analysis*; D011722:Pyrethrins / Q000032:analysis*; D012680:Sensitivity and Specificity; D012756:Sheep; D013552:Swine; D014481:United States; D014486:United States Food and Drug Administration
chemical_list: D017633:Magnesium Silicates; D011722:Pyrethrins; C005013:Florisil