Otro
Avaliação dos parâmetros de solubilidade de Hildebrand/Hansen na seleção de solventes para a extração de pesticidas organoclorados do solo
Registro en:
Química Nova. Sociedade Brasileira de Química, v. 34, n. 9, p. 1501-1506, 2011.
0100-4042
10.1590/S0100-40422011000900004
S0100-40422011000900004
WOS:000297313200004
S0100-40422011000900004.pdf
Autor
Villa, Ricardo D
de Oliveira, Adriana P
Nogueira, Raquel Fernandes Pupo
Resumen
This work evaluated the use of the Hildebrand/Hansen solubility parameters for selection of solvents for extraction of the organochlorine pesticides pp' DDT, pp' DDE, Aldrin and a-Endossulfan from soil using columns packed with Al2O3. The mixtures hexane:dichloromethane (7:3; v/v), hexane:acetonitrile (1:1; v/v), hexane:acetone (1:1; v/v) and pure hexane were chosen as extracting solutions. In the addition and recovery tests, different extraction solutions provided high recoveries percentages (>75%) with coefficients of variation below 15%. The recoveries are in agreement with the Hildebrand/Hansen parameters, demonstrating its applicability in the selection of extracting solution and in the replacement of toxic solvents, as dichloromethane