Distribution of organochlorine pesticides in a tropical waterway: HCH isomers

Authors :: Sujatha, C. H.
Nair, S. M.
Kumar, N. C.
Chacko, J.
Source :: Toxicological and Environmental Chemistry; November 1991, Vol. 39 Issue: 1-2 p103-111, 9p
Publication Year :: 1991
Abstract: Pesticide residue levels in the aquatic systems are scattered and fragmentory in India. A systematic analysis of the distribution pattern of the common organochlorine pesticide Hexachlorocyclohexane (HCH) and its isomers in the waters of the tropical positive estuarine system (the Cochin Estuarine System) has been carried out for the first time. The average concentrations of HCH ranged between 0.013 and 1.125 μg 1-1. α-HCH was found to be at an appreciable concentrations throughout the study area and formed the highest percentage (90%) of all isomers of the HCH family