HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Nash, R. G. Articles by Beall, M. L. Search for Related Content PubMed Articles by Nash, R. G. Articles by Beall, M. L., Jr. Agricola Articles by Nash, R. G. Articles by Beall, M. L.

Extraction and Cleanup of ¹⁴C-Chlorinated Insecticides from Cotton Grown in Treated Soils

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.

Key Words: DDT • Dieldrin • Endrin • Heptachlor • Residues • Degradation

Received for publication October 8, 1969.