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Spectrophotometric determination of carbaryl in grains.

Appaiah, K. M. and Rasamsetti, Ramakrishna. and Subba Rao, K. R. and Omprakash, Kapur. (1982) Spectrophotometric determination of carbaryl in grains. Journal of the Association of Official Analytical Chemists, 65 (1). 32-34, 5 ref..

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Abstract

A method for detn. of residues of the insecticide carbaryl [1-naphthyl N-methyl carbamate] in cereals and pulses is described. It is based on hydrolysis of carbaryl with methanolic KOH to give 1-naphthol, which is then reacted with 4-aminophenazone in the presence of K3Fe(CN)6 under alkaline conditions to give a reaction product which is determined by spectrophotometry at 475 nm. Absorbance is linearly related to concn. over the range 0.5-20 mug/ml. Recovery studies were conducted on rice, wheat, sorghum, pigeon peas, black gram and green gram; % recovery ranged from 94.0 to 100.0. Detection limit is 0.3 p.p.m.

Item Type: Article
Uncontrolled Keywords: INSECTICIDES-; cereals, carbaryl residues spectrophotometric detn. in; pulses, carbaryl residues spectrophotometric detn. in; SPECTROSCOPY-; LEGUMES-; CEREALS-; carbaryl residues spectrophotometric detn. in cereals
Subjects: 500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 26 Pesticide Chemistry
600 Technology > 08 Food technology > 01 Analysis
600 Technology > 08 Food technology > 16 Nutritive value > 08 Grains
Divisions: Food Safety Analytical Quality Control Lab
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 25 Nov 2016 10:47
Last Modified: 11 Oct 2018 08:43
URI: http://ir.cftri.com/id/eprint/6807

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