J. Velasco et al., EXTRACTION FROM WATER AND PURIFICATION OF ORGANOPHOSPHATE PESTICIDES, Toxicological and environmental chemistry, 43(1-2), 1994, pp. 19-22
Pesticide residues have been extracted from water using an XAD-2 amber
lite column and analysed by colorimetry. Acetone and hexane were used
as eluants. The best results were obtained with malathion.