01848naa a2200205 a 450000100080000000500110000800800410001902400380006010000210009824501490011926000090026852011090027765000170138665000320140365300580143570000210149370000200151470000260153477300820156021518492023-02-17       2011    bl uuuu     u00u1 u    #d7 a10.1080/03601234.2012.5920582DOI1 aBRONDI, S. H. G.  aApplication of QuEChERS method and gas chromatography-mass spectrometry for the analysis of cypermethrin residue in milk.h[electronic resource]  c2011  aAnalytical methods for the isolation and determination of cypermethrin in milk, based on the solid-phase microextraction (SPME) and QuEChERS methods (Quick, Easy, Cheap, Effective, Rugged, and Safe) are presented. The SPME technique was not appropriate to analyse cypermethrin in milk, even establishing the best extraction conditions, polydimethylsiloxane fiber, 60 min time extraction, 60 ◦C temperature extraction, addition of salt (NaCl) and stirring rate. The extraction efficiency was low probably because of the matrix constituents. The QuEChERS method involves the extraction of the analyte with acetonitrile and simultaneous liquid-liquid partitioning formed by adding anhydrous MgSO4 plus NaCl, followed by the removal of residual water and cleanup using a procedure called dispersive solid-phase extraction, in which anhydrous MgSO4 plus PSA and C18 are mixed with 1 mL of acetonitrile extract. The detection and quantification limits were 0.01 and 0.04 mg kg−1 , respectively, and the percentage recovery obtained ranged from 92 to 105% with relative standard deviations below 7%.  aCypermethrin  aSolid phase microextraction  aQuick Easy Cheap Effective Rugged and Safe (QuEChERS)1 aMACEDO, A. N. DE1 aSOUZA, G. B. de1 aNOGUEIRA, A. R. de A.  tJournal of Environmental Science and Health, Part Bgv. 46, p. 671?677, 2011.