Recovery of Ethylene Chlorobromide from Agricultural Products

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A quantitative method has been developed to determine residual ethylene chlorobromide in agricultural and food commodities that have been fumigated for insect infestations. The ethylene chlorobromide was separated from the commodities by steam distillation, hydrolyzed in alcoholic alkali and determined as bromine by iodometry. When ethylene chlorobromide, varying in amounts between 0.2 mg and 5.35 mg, was added to water and to macerated orange, lemon, and avocado tissues and ground corn and wheat, the recoveries varied from 93.9% in corn to 100.3% in water. Experiments performed with the macerated tissues, to which known amounts of ethylene chlorobromide were added and allowed to stand at approximately 70°F for 10 days, indicated that the fumigant reacted with the chemical constituents of these commodities. Under experimental conditions wheat retained 2.7 ppm ethylene chlorobromide and 0.8 ppm bromine as a degradation product 14 days after fumigation, and Valencia oranges retained 1.0 ppm ethylene ehlorohromide in the whole fruit and 11.2 ppm bromine in the peel 9 days after fumigation.

Document Type: Research Article

Publication date: June 1, 1964

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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