02073naa a2200265 a 450000100080000000500110000800800410001902400380006010000220009824501840012026000090030452012140031365000140152765000230154165000220156465000090158665000150159565300080161065300130161870000210163170000200165270000260167270000210169877300880171919438142023-02-23       2012    bl uuuu     u00u1 u    #d7 a10.1080/10826076.2011.6276092DOI1 aSARTARELLI, N. C.  aDetermination of chlorfenvinphos, fipronil, and cypermethrin residues in meat and bovine fat using Quechers methods and gas chromatography-mass spectromety.h[electronic resource]  c2012  analytic methods were applied and validated to measure residues of chlorfenvinphos, fipronil, and cypermethrin in meat and bovine fat, using the QuEChERS method and gas chromatography-mass spectrometry. For the meat, 2 g of sample, 4 mL of acetonitrile, 1.6 g of MgSO 4 , and 0.4 g of NaCl were used in the liquid-liquid partition, while 80 mg of C18, 80 mg of primary and secondary amine and 150 mg of MgSO 4 were employed in the dispersive solid-phase extraction. For the fat, 1 g of sample, 5 mL of hexane, 10 mL of water, 10 mL of acetonitrile, 4 g of MgSO 4 , and 0.5 g of NaCl were used in the liquid-liquid partition and 50 mg of primary and secondary amine and 150 mg of MgSO 4 were used in the dispersive solid-phase extraction. The recovery percentages obtained for the pesticides in meat at different concentrations ranged from 81 to 129% with relative standard deviation below 27%. The corresponding results from the fat ranged from 70 to 123% with relative standard deviation below 25%. The methods showed sensitivity, precision, and accuracy according to EPA standards and quantification limits below the maximum residue limit established by European Union, except for chlorfenvinphos in the fat.  achemistry  agas chromatography  amass spectrometry  ameat  apesticides  aFat  aQuECHERS1 aMACEDO, A. N. de1 aSOUSA, J. P. de1 aNOGUEIRA, A. R. de A.1 aBRONDI, S. H. G.  tJournal of Liquid Chromatography & Related Tecnologuiesgv. 35, p. 1895-1908, 2012.