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Colorimetric method for estimation of methyl iodide residues on jowar (sorghum) and rice.

Rangaswamy, J. R. and Majumder, S. K. and Poornima, P. (1972) Colorimetric method for estimation of methyl iodide residues on jowar (sorghum) and rice. Journal of the Association of Official Analytical Chemists, 55 (4). 800-801, 3 ref..

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Abstract

A new colorimetric method based on the catalytic action of iodide on oxidation of As(III) by Ce(IV) has been developed for the estimation of methyl iodide residues on grains. Methyl iodide residues, in methanolic KOH, are converted to potassium iodide which acts as a catalyst in the timed oxidation of As(III) by Ce(IV). Unreduced ceric salt is measured colorimetrically and the iodide in the samples is calculated. The method is sensitive in the range 0.01 to 0.1 mug iodide.

Item Type: Article
Uncontrolled Keywords: IODOPHORS-; Detn. of methyl iodide residues by colorimetry; RESIDUES-; COLORIMETRY-; RICE-; Detn. of methyl iodide in /rice/; SORGHUM-; Detn. of methyl iodide in /sorghum/
Subjects: 500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 26 Pesticide Chemistry
600 Technology > 08 Food technology > 21 Cereals > 01 Rice
Divisions: Food Protectants and Infestation Control
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 19 Dec 2016 12:59
Last Modified: 19 Dec 2016 12:59
URI: http://ir.cftri.com/id/eprint/3518

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