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Stabilization of oversaturated aqueous solutions of deltamethrin, a highly lipophilic molecule
B Lefebvre1, C Chaillou, P Roubaud
1Laboratoire de Cytophysiologie et Toxicologie Cellulaire, Université Paris, France.
Abstract:
The stability of oversaturated solutions of the highly lipophilic molecule deltamethrin under the conditions of continuous agitation and oxygenation by air bubble flow in a toxicologic test on fish embryos was studied. In polyethylene, glass, and Teflon containers, the 24-hr adsorption rate of 1 mg/l solutions was over 80%. Improvement by Sharon and Solomon's PEG-glass pretreatment did not exceed a small percentage. After agarose precoating, the adsorption rate in the glass or polyethylene containers was reduced to about 20%. The stabilizing effect of precoating agarose containers diminished with the concentration of the solution.
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