Determination of residues of endosulfan and endosulfan sulfate on eggplant, mustard and chickpea

Abstract
Extractable residues of endosulfan stereoisomers and its toxic metabolite, endosulfan sulfate, on a vegetable, an oilseed and a pulse crop were determined by gas‐liquid chromatography. The study revealed that the alpha isomer degraded faster than the beta isomer. Beta‐endosulfan accumulated during the first three days following the treatment. Endosulfan sulfate residues appeared a few days after application and decreased with time. The total endosulfan residues in the seeds from treated mustard ranged from 0.08 to 0.12 mg kg−1 and were at or below the limit of determination (0.02 mg kg−1) in chickpea seeds following harvest.