Extraction and Cleanup of 14C-Chlorinated Insecticides from Cotton Grown in Treated Soils
- R. G. Nash and
- M. L. Beall2
Dry cotton hay or seed samples from plants grown in 0.5 ppm 14MC-DDT, -dieldrin, -endrin, and -heptachlor treated soils were subjected to exhaustive Soxhlet extraction with chloroform/methanol (CM), hexane/acetone (HA), hexane/acetone/methanol (HAM), or hexane/acetone/ methanol/water (HAMW). Extracts further were fractionated by selective elution from Florisil columns and the 14C-insecticide residues determined.
The relative extracting power of the solvents was HAMW>HAM=CM>HA; this applied to all insecticides except DDT, whose residue was too low for reliable comparison. No solution removed all the 14C-residue from plant tissue. HAM afforded greater simplicity and less time in cleanup compared to CM.
One dieldrin degradation product, three endrin degradation products, and three heptachlor degradation products, which includes heptachlor epoxide, were believed extracted from cotton hay with HAMW.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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