A method for immunoassay analysis of the organochlorine insecticide, hexachlorocyclohexane (HCH) has been developed, based upon alkaline conversion in standards and samples to trichlorobenzenes. The trichlorobenzenes were detected through antisera developed to haptens containing either a trichlorobenzene or trichlorpyridine moiety, developed using the herbicides, 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) and triclopyr, respectively. An enzyme conjugate based on 2,4,5-trichlorophenol provided most sensitive and specific detection. Although the assays cross-reacted with the herbicides, they did not suffer from the major disadvantage of extremely strong cross-reaction with cyclodiene organochlorines reported for a commercial HCH assay. The most sensitive assay had a lower detection limit of 20 g l–1 in drinking water and was applied to water and soil matrices.
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Document Type: Research Article
CSIRO Plant Industry, PO Box 7, North Ryde, NSW 1670, Australia
CSIRO Plant Insdustry, PO Box 7, North Ryde, NSW 1670, Australia
Central Food Technological Research Institute, Food Protectants and Infestation Control Department, Mysore, 570013 India
CSIRO Plant Industry, GPO Box 1600, Canberra, ACT 2601, Australia
September 1, 2000
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