Spectrophotometric determination of the fungicides captan and folpet in their commercial formulations
نویسنده
چکیده
Captan and folpet react with thiophenol in the presence of triethylamine in acetonitrile to form a bis (phenyl) trithiocarbonate which reacts with 2, 4dinitrophenyl hydrazine in the presence of hydrochloric acid to form corresponding hydrazone. The latter is transformed into an intense red quinoidal ion immediately on making solution alkaline. This observation have been made the basis of a simple spectrophotometric method for the determination of above fungicides. The red colour is stable for at least 6 hrs and shows ë max at 510 nm using either fungicide. The method has been successfully applied to the analysis of above fungicides in their commercial formulations samples. Global Scientific Inc.
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