01322naa a2200205 a 450000100080000000500110000800800410001910000160006024500770007626000090015352007460016265000230090865000130093165300140094465300130095870000200097170000230099170000210101477300810103518129032017-07-20       2008    bl uuuu     u00u1 u    #d1 aMIRANDA, K.  aPesticide residues in river sediments from the Pantanal Wetland, Brazil.  c2008  aSediment samples from 25 sites in 17 rivers of the Pantanal (Brazil) were analyzed with the objective of evaluating pesticide contamination in sediments. Samples were extracted with an acetone, ethylacetate, and water mixture 2:2:1 (v/v/v). The extract was purified by flash chromatography with aluminum oxide and florisil. A multiresidue gas chromatography-mass spectrometry method was applied to monitor 23 pesticides of different chemical classes (organochlorine, organophosphorus, triazines, anilides and pyrethroids) with some of their degradation products. Compounds identified in sediment samples included ë-cyhalothrin (1.0 to 5.0 ìg kg.1), p,p-DDT (3.6 ìg kg.1), deltamethrin (20.0 ìg kg.1) and permethrin (1.0 to 7.0 ìg kg.1).  agas chromatography  aPantanal  aPesticide  asediment1 aCUNHA, M. L. F.1 aDORES, E. F. G. C.1 aCALHEIROS, D. F.  tJournal of Environmental Science and Health Part Bgn. 43, p. 717-722, 2008.