Colorimetric method for the determination of ethylene dibromide residues in grains and air.

Rangaswamy, J. R. and Vijayashankar, Y. N. and Muthu, M. (1976) Colorimetric method for the determination of ethylene dibromide residues in grains and air. Journal of the Association of Official Analytical Chemists, 59 (6). 1262-1265, 16 ref..

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Abstract

A method based on the hydrolytic determination of ethylene dibromide (EDB) in the presence of an oxidizing agent was developed. Br liberated from inorganic bromide is used to brominate p-rosaniline. The intensity of the resulting violet-red bromo compound in chloroform is measured at 580 nm. The relationship between absorbance and concn. of EDB is linear in the range of 5-60 mug. The method is very sensitive and as little as 0.50 ppm unchanged EDB residue in a 20 g sample of fumigated grain and 1 ppm EDB in a 10 ml air sample can be detected. The method was applied to various grains (wheat, sorghum, paddy, green gram) which had been fumigated with EDB.

Item Type:	Article
Uncontrolled Keywords:	FUMIGANTS-; air, ethylene dibromide residues detn. in; AIR-; ethylene dibromide residues detn. in air; GRAIN-; ethylene dibromide residues detn. in grain; COLORIMETRY-; grain, ethylene dibromide residues detn. In
Subjects:	600 Technology > 01 Medical sciences > 17 Toxicology 600 Technology > 08 Food technology > 16 Nutritive value > 08 Grains
Divisions:	Food Protectants and Infestation Control
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	10 Feb 2015 06:58
Last Modified:	10 Feb 2015 06:58
URI:	http://ir.cftri.res.in/id/eprint/3522

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