Some Chemical and Biological Experiments with Thiodan1

Insecticide Analysis, Quantitative Determination of Thiodan by Gas Chromatography

“…Infrared Spectroscopy. Chromatographically pure Thiodan B when dissolved in carbon tetrachloride yielded an infrared spectrum identical to that published in the literature (3).…”

Persistence of endosulfan in soils

“…Technical endosulfan contains two isomers, viz., endosulfan A and endosulfan B in a 4:1 ratio, respectively (Lindquist and Dahm, 1957). The various metabolites of endosulfan that have been reported are endosulfan alcohol, endosulfan ether, endosulfan sulfate, endosulfan a-hydroxy ether, and endosulfan lactone (Maier-Bode, 1968).…”

Insecticide Residues, Microdetermination of Thiodan Residues

“…At present, analytical procedures such as chromatographic (4) and colorimetric Ammonium hydroxide, aluminum hydroxide, and barium hydroxide, when substituted for the sodium hydroxide, gave no color even when the heating time was increased. Sodium hydroxide and potassium hydroxide from 0.5 to 3.0AT produced the desired color, but a precipitate formed very quickly and this interfered w'ith the reading of the absorbance.…”

“…is slightly less. The slope of the curve of the Thiodandiol is midway between that of recrystallized technical Thiodan and isomer A. Absorption Characteristics of Thiodan, Thiodan Isomers, and Thiodandiol Commercial Thiodan is a mixture of two geometric isomers (4). Lindquist and coworkers (5) have suggested that Thiodan residues may contain Thiodandiol.…”