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5361438 
Technical Report 
Parathion: persistence on cotton and identification of its photoalteration products 
Baetcke, KP; Joiner, RL 
1973 
3 
391-396 
HAPAB Parathion was found to be at least seven times more persistent than previously reported on cotton. ((SUP)14C)Parathion was applied four times in three successive weeks to cotton in four environmental situations: environmental growth chamber; greenhouse; controlled-exposure field; and open field. After 28 days, 11.2 to 15.4% of the total radioactivity applied was recovered by methanol extraction and was found to be 58 to 68% unchanged ((SUP)14C)parathion. There was a constant increase in photoalteration products, coupled with a consistent decrease in ((SUP)14C)parathion with time. Photoalteration products of parathion present included S-ethyl parathion, S-phenyl parathion, paraoxon, and p-nitrophenol. No previously unreported metabolites were found on cotton foliage. Procedures for the extraction, purification, identification, and quantitation of (SUP)14C-radioactivity on cotton are discussed. (Author abstract reprinted by permission of the American Chemical Society)==