Simple spectrophotometric method for determination of phosphine residues in wheat.

Rangaswamy, J. R. (1984) Simple spectrophotometric method for determination of phosphine residues in wheat. Journal of the Association of Official Analytical Chemists, 67 (1). 117-122, 22 ref..

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Abstract

A method was developed for detn. of phosphine residues in wheat, based on the reaction of phosphine with silver nitrate in aqueous solution to form an egg-yellow chromophore with an absorption max. at 400 nm. At this wavelength, there is a linear relationship between absorbance and concn. of phosphine in the range 10-100 ng/ml. Phosphine-fumigated wheat is soaked in a known volume of AgNO3 solution, and the absorbance of the filtrate is read against a blank at 400 nm. The method is sensitive, with lower detection and estimation limits of 0.008 and 0.01 mug PH3, resp. Recovery of added phosphine from a closed system was 85-100%. Accuracy for this method was compared with that for the gas chromatographic method.

Item Type:	Article
Uncontrolled Keywords:	FUMIGATION-; wheat, phosphine residues detn. in; SPECTROSCOPY-; WHEAT-; phosphine residues detn. in wheat
Subjects:	500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 10 Spectroscopic and Spectrometric analysis 500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 26 Pesticide Chemistry 600 Technology > 08 Food technology > 21 Cereals > 04 Wheat
Divisions:	Food Protectants and Infestation Control
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	13 Aug 2021 06:53
Last Modified:	13 Aug 2021 06:53
URI:	http://ir.cftri.res.in/id/eprint/6690

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